AyeCode / invoicing

widgets/getpaid.php

Indentation +97 added lines, -97 removed lines

@@ -36,36 +36,36 @@ 
                     'desc_tip'    => true,
                     'default'     => '',
                     'advanced'    => false
-				),
+                ),
 
                 'form'  => array(
-	                'title'       => __( 'Form', 'invoicing' ),
-	                'desc'        => __( 'Enter a form id in case you want to display a specific payment form', 'invoicing' ),
-	                'type'        => 'text',
-	                'desc_tip'    => true,
-	                'default'     => '',
-	                'placeholder' => __('1','invoicing'),
-	                'advanced'    => false
-				),
-
-				'item'  => array(
-	                'title'       => __( 'Items', 'invoicing' ),
-	                'desc'        => __( 'Enter comma separated list of invoicing item id and quantity (item_id|quantity). Ex. 101|2. This will be ignored in case you specify a form above. Enter 0 as the quantity to let users select their own quantities', 'invoicing' ),
-	                'type'        => 'text',
-	                'desc_tip'    => true,
-	                'default'     => '',
-	                'placeholder' => __('1','invoicing'),
-	                'advanced'    => false
-				),
+                    'title'       => __( 'Form', 'invoicing' ),
+                    'desc'        => __( 'Enter a form id in case you want to display a specific payment form', 'invoicing' ),
+                    'type'        => 'text',
+                    'desc_tip'    => true,
+                    'default'     => '',
+                    'placeholder' => __('1','invoicing'),
+                    'advanced'    => false
+                ),
+
+                'item'  => array(
+                    'title'       => __( 'Items', 'invoicing' ),
+                    'desc'        => __( 'Enter comma separated list of invoicing item id and quantity (item_id|quantity). Ex. 101|2. This will be ignored in case you specify a form above. Enter 0 as the quantity to let users select their own quantities', 'invoicing' ),
+                    'type'        => 'text',
+                    'desc_tip'    => true,
+                    'default'     => '',
+                    'placeholder' => __('1','invoicing'),
+                    'advanced'    => false
+                ),
 
                 'button'  => array(
-	                'title'       => __( 'Button', 'invoicing' ),
-	                'desc'        => __( 'Enter button label in case you would like to display the forms in a popup.', 'invoicing' ),
-	                'type'        => 'text',
-	                'desc_tip'    => true,
-	                'default'     => '',
-	                'advanced'    => false
-				)
+                    'title'       => __( 'Button', 'invoicing' ),
+                    'desc'        => __( 'Enter button label in case you would like to display the forms in a popup.', 'invoicing' ),
+                    'type'        => 'text',
+                    'desc_tip'    => true,
+                    'default'     => '',
+                    'advanced'    => false
+                )
 
             )
 
@@ -75,91 +75,91 @@ 
         parent::__construct( $options );
     }
 
-	/**
-	 * The Super block output function.
-	 *
-	 * @param array $args
-	 * @param array $widget_args
-	 * @param string $content
-	 *
-	 * @return string
-	 */
+    /**
+     * The Super block output function.
+     *
+     * @param array $args
+     * @param array $widget_args
+     * @param string $content
+     *
+     * @return string
+     */
     public function output( $args = array(), $widget_args = array(), $content = '' ) {
 
-	    // Is the shortcode set up correctly?
-		if ( empty( $args['form'] ) && empty( $args['item'] ) ) {
-			return aui()->alert(
-				array(
-					'type'    => 'warning',
-					'content' => __( 'No payment form or item selected', 'invoicing' ),
-				)
-			);
-		}
-
-		// Payment form or button?
-		if ( ! empty( $args['form'] ) ) {
-			return $this->handle_payment_form(  $args );
-		} else {
-			return $this->handle_buy_item(  $args );
-		}
-
-	}
-
-	/**
-	 * Displaying a payment form
-	 *
-	 * @return string
-	 */
+        // Is the shortcode set up correctly?
+        if ( empty( $args['form'] ) && empty( $args['item'] ) ) {
+            return aui()->alert(
+                array(
+                    'type'    => 'warning',
+                    'content' => __( 'No payment form or item selected', 'invoicing' ),
+                )
+            );
+        }
+
+        // Payment form or button?
+        if ( ! empty( $args['form'] ) ) {
+            return $this->handle_payment_form(  $args );
+        } else {
+            return $this->handle_buy_item(  $args );
+        }
+
+    }
+
+    /**
+     * Displaying a payment form
+     *
+     * @return string
+     */
     protected function handle_payment_form( $args = array() ) {
 
-		if ( empty( $args['button'] ) ) {
-			return getpaid_display_payment_form( $args['form'] );
-		}
+        if ( empty( $args['button'] ) ) {
+            return getpaid_display_payment_form( $args['form'] );
+        }
 
-		return $this->payment_form_button( $args['form'], $args['button'] );
-	}
+        return $this->payment_form_button( $args['form'], $args['button'] );
+    }
 
-	/**
-	 * Displays a payment form button.
-	 *
-	 * @return string
-	 */
+    /**
+     * Displays a payment form button.
+     *
+     * @return string
+     */
     protected function payment_form_button( $form, $button ) {
-		return getpaid_get_payment_button( $button, $form );
-	}
-
-	/**
-	 * Selling an item
-	 *
-	 * @return string
-	 */
+        return getpaid_get_payment_button( $button, $form );
+    }
+
+    /**
+     * Selling an item
+     *
+     * @return string
+     */
     protected function handle_buy_item( $args = array() ) {
 
-		if ( empty( $args['button'] ) ) {
-			return $this->buy_item_form( $args['item'] );
-		}
+        if ( empty( $args['button'] ) ) {
+            return $this->buy_item_form( $args['item'] );
+        }
 
-		return $this->buy_item_button( $args['item'], $args['button'] );
+        return $this->buy_item_button( $args['item'], $args['button'] );
 
-	}
+    }
 
-	/**
-	 * Displays a buy item form.
-	 *
-	 * @return string
-	 */
+    /**
+     * Displays a buy item form.
+     *
+     * @return string
+     */
     protected function buy_item_form( $item ) {
-		$items = getpaid_convert_items_to_array( $item );
-		return getpaid_display_item_payment_form( $items );
-	}
-
-	/**
-	 * Displays a buy item button.
-	 *
-	 * @return string
-	 */
+        $items = getpaid_convert_items_to_array( $item );
+        return getpaid_display_item_payment_form( $items );
+    }
+
+    /**
+     * Displays a buy item button.
+     *
+     * @return string
+     */
     protected function buy_item_button( $item, $button ) {
-		return getpaid_get_payment_button( $button, null, $item );
+        return getpaid_get_payment_button( $button, null, $item );
     }
 
 }

Spacing +35 added lines, -35 removed lines

@@ -1,5 +1,5 @@ 
 <?php
-if ( ! defined( 'ABSPATH' ) ) {
+if (!defined('ABSPATH')) {
     exit;
 }
 
@@ -22,16 +22,16 @@ 
             'block-keywords'=> "['invoicing','buy', 'buy item', 'form']",
             'class_name'     => __CLASS__,
             'base_id'       => 'getpaid',
-            'name'          => __('GetPaid','invoicing'),
+            'name'          => __('GetPaid', 'invoicing'),
             'widget_ops'    => array(
                 'classname'   => 'getpaid bsui',
-                'description' => esc_html__('Show payment forms or buttons.','invoicing'),
+                'description' => esc_html__('Show payment forms or buttons.', 'invoicing'),
             ),
             'arguments'     => array(
 
                 'title'  => array(
-                    'title'       => __( 'Widget title', 'invoicing' ),
-                    'desc'        => __( 'Enter widget title.', 'invoicing' ),
+                    'title'       => __('Widget title', 'invoicing'),
+                    'desc'        => __('Enter widget title.', 'invoicing'),
                     'type'        => 'text',
                     'desc_tip'    => true,
                     'default'     => '',
@@ -39,28 +39,28 @@ 
 				),
 
                 'form'  => array(
-	                'title'       => __( 'Form', 'invoicing' ),
-	                'desc'        => __( 'Enter a form id in case you want to display a specific payment form', 'invoicing' ),
+	                'title'       => __('Form', 'invoicing'),
+	                'desc'        => __('Enter a form id in case you want to display a specific payment form', 'invoicing'),
 	                'type'        => 'text',
 	                'desc_tip'    => true,
 	                'default'     => '',
-	                'placeholder' => __('1','invoicing'),
+	                'placeholder' => __('1', 'invoicing'),
 	                'advanced'    => false
 				),
 
 				'item'  => array(
-	                'title'       => __( 'Items', 'invoicing' ),
-	                'desc'        => __( 'Enter comma separated list of invoicing item id and quantity (item_id|quantity). Ex. 101|2. This will be ignored in case you specify a form above. Enter 0 as the quantity to let users select their own quantities', 'invoicing' ),
+	                'title'       => __('Items', 'invoicing'),
+	                'desc'        => __('Enter comma separated list of invoicing item id and quantity (item_id|quantity). Ex. 101|2. This will be ignored in case you specify a form above. Enter 0 as the quantity to let users select their own quantities', 'invoicing'),
 	                'type'        => 'text',
 	                'desc_tip'    => true,
 	                'default'     => '',
-	                'placeholder' => __('1','invoicing'),
+	                'placeholder' => __('1', 'invoicing'),
 	                'advanced'    => false
 				),
 
                 'button'  => array(
-	                'title'       => __( 'Button', 'invoicing' ),
-	                'desc'        => __( 'Enter button label in case you would like to display the forms in a popup.', 'invoicing' ),
+	                'title'       => __('Button', 'invoicing'),
+	                'desc'        => __('Enter button label in case you would like to display the forms in a popup.', 'invoicing'),
 	                'type'        => 'text',
 	                'desc_tip'    => true,
 	                'default'     => '',
@@ -72,7 +72,7 @@ 
         );
 
 
-        parent::__construct( $options );
+        parent::__construct($options);
     }
 
 	/**
@@ -84,23 +84,23 @@ 
 	 *
 	 * @return string
 	 */
-    public function output( $args = array(), $widget_args = array(), $content = '' ) {
+    public function output($args = array(), $widget_args = array(), $content = '') {
 
 	    // Is the shortcode set up correctly?
-		if ( empty( $args['form'] ) && empty( $args['item'] ) ) {
+		if (empty($args['form']) && empty($args['item'])) {
 			return aui()->alert(
 				array(
 					'type'    => 'warning',
-					'content' => __( 'No payment form or item selected', 'invoicing' ),
+					'content' => __('No payment form or item selected', 'invoicing'),
 				)
 			);
 		}
 
 		// Payment form or button?
-		if ( ! empty( $args['form'] ) ) {
-			return $this->handle_payment_form(  $args );
+		if (!empty($args['form'])) {
+			return $this->handle_payment_form($args);
 		} else {
-			return $this->handle_buy_item(  $args );
+			return $this->handle_buy_item($args);
 		}
 
 	}
@@ -110,13 +110,13 @@ 
 	 *
 	 * @return string
 	 */
-    protected function handle_payment_form( $args = array() ) {
+    protected function handle_payment_form($args = array()) {
 
-		if ( empty( $args['button'] ) ) {
-			return getpaid_display_payment_form( $args['form'] );
+		if (empty($args['button'])) {
+			return getpaid_display_payment_form($args['form']);
 		}
 
-		return $this->payment_form_button( $args['form'], $args['button'] );
+		return $this->payment_form_button($args['form'], $args['button']);
 	}
 
 	/**
@@ -124,8 +124,8 @@ 
 	 *
 	 * @return string
 	 */
-    protected function payment_form_button( $form, $button ) {
-		return getpaid_get_payment_button( $button, $form );
+    protected function payment_form_button($form, $button) {
+		return getpaid_get_payment_button($button, $form);
 	}
 
 	/**
@@ -133,13 +133,13 @@ 
 	 *
 	 * @return string
 	 */
-    protected function handle_buy_item( $args = array() ) {
+    protected function handle_buy_item($args = array()) {
 
-		if ( empty( $args['button'] ) ) {
-			return $this->buy_item_form( $args['item'] );
+		if (empty($args['button'])) {
+			return $this->buy_item_form($args['item']);
 		}
 
-		return $this->buy_item_button( $args['item'], $args['button'] );
+		return $this->buy_item_button($args['item'], $args['button']);
 
 	}
 
@@ -148,9 +148,9 @@ 
 	 *
 	 * @return string
 	 */
-    protected function buy_item_form( $item ) {
-		$items = getpaid_convert_items_to_array( $item );
-		return getpaid_display_item_payment_form( $items );
+    protected function buy_item_form($item) {
+		$items = getpaid_convert_items_to_array($item);
+		return getpaid_display_item_payment_form($items);
 	}
 
 	/**
@@ -158,8 +158,8 @@ 
 	 *
 	 * @return string
 	 */
-    protected function buy_item_button( $item, $button ) {
-		return getpaid_get_payment_button( $button, null, $item );
+    protected function buy_item_button($item, $button) {
+		return getpaid_get_payment_button($button, null, $item);
     }
 
 }

includes/class-wpinv-ajax.php

Indentation +11 added lines, -11 removed lines

@@ -714,24 +714,24 @@
         }
 
         // Is the request set up correctly?
-		if ( empty( $_GET['form'] ) && empty( $_GET['item'] ) ) {
-			echo aui()->alert(
-				array(
-					'type'    => 'warning',
-					'content' => __( 'No payment form or item provided', 'invoicing' ),
-				)
+        if ( empty( $_GET['form'] ) && empty( $_GET['item'] ) ) {
+            echo aui()->alert(
+                array(
+                    'type'    => 'warning',
+                    'content' => __( 'No payment form or item provided', 'invoicing' ),
+                )
             );
             exit;
         }
 
         // Payment form or button?
-		if ( ! empty( $_GET['form'] ) ) {
+        if ( ! empty( $_GET['form'] ) ) {
             echo getpaid_display_payment_form( $_GET['form'] );
-		} else if( $_GET['invoice'] ) {
-		    echo getpaid_display_invoice_payment_form( $_GET['invoice'] );
+        } else if( $_GET['invoice'] ) {
+            echo getpaid_display_invoice_payment_form( $_GET['invoice'] );
         } else {
-			$items = getpaid_convert_items_to_array( $_GET['item'] );
-		    echo getpaid_display_item_payment_form( $items );
+            $items = getpaid_convert_items_to_array( $_GET['item'] );
+            echo getpaid_display_item_payment_form( $items );
         }
         
         exit;

Spacing +394 added lines, -394 removed lines

@@ -7,28 +7,28 @@ 
  */
  
 // MUST have WordPress.
-if ( !defined( 'WPINC' ) ) {
-    exit( 'Do NOT access this file directly: ' . basename( __FILE__ ) );
+if (!defined('WPINC')) {
+    exit('Do NOT access this file directly: ' . basename(__FILE__));
 }
 
 class WPInv_Ajax {
     public static function init() {
-        add_action( 'init', array( __CLASS__, 'define_ajax' ), 0 );
-        add_action( 'template_redirect', array( __CLASS__, 'do_wpinv_ajax' ), 0 );
+        add_action('init', array(__CLASS__, 'define_ajax'), 0);
+        add_action('template_redirect', array(__CLASS__, 'do_wpinv_ajax'), 0);
         self::add_ajax_events();
     }
 
     public static function define_ajax() {
-        if ( !empty( $_GET['wpinv-ajax'] ) ) {
-            if ( ! defined( 'DOING_AJAX' ) ) {
-                define( 'DOING_AJAX', true );
+        if (!empty($_GET['wpinv-ajax'])) {
+            if (!defined('DOING_AJAX')) {
+                define('DOING_AJAX', true);
             }
-            if ( ! defined( 'WC_DOING_AJAX' ) ) {
-                define( 'WC_DOING_AJAX', true );
+            if (!defined('WC_DOING_AJAX')) {
+                define('WC_DOING_AJAX', true);
             }
             // Turn off display_errors during AJAX events to prevent malformed JSON
-            if ( ! WP_DEBUG || ( WP_DEBUG && ! WP_DEBUG_DISPLAY ) ) {
-                /** @scrutinizer ignore-unhandled */ @ini_set( 'display_errors', 0 );
+            if (!WP_DEBUG || (WP_DEBUG && !WP_DEBUG_DISPLAY)) {
+                /** @scrutinizer ignore-unhandled */ @ini_set('display_errors', 0);
             }
             $GLOBALS['wpdb']->hide_errors();
         }
@@ -37,24 +37,24 @@ 
     public static function do_wpinv_ajax() {
         global $wp_query;
 
-        if ( !empty( $_GET['wpinv-ajax'] ) ) {
-            $wp_query->set( 'wpinv-ajax', sanitize_text_field( $_GET['wpinv-ajax'] ) );
+        if (!empty($_GET['wpinv-ajax'])) {
+            $wp_query->set('wpinv-ajax', sanitize_text_field($_GET['wpinv-ajax']));
         }
 
-        if ( $action = $wp_query->get( 'wpinv-ajax' ) ) {
+        if ($action = $wp_query->get('wpinv-ajax')) {
             self::wpinv_ajax_headers();
-            do_action( 'wpinv_ajax_' . sanitize_text_field( $action ) );
+            do_action('wpinv_ajax_' . sanitize_text_field($action));
             die();
         }
     }
     
     private static function wpinv_ajax_headers() {
         send_origin_headers();
-        /** @scrutinizer ignore-unhandled */ @header( 'Content-Type: text/html; charset=' . get_option( 'blog_charset' ) );
-        /** @scrutinizer ignore-unhandled */ @header( 'X-Robots-Tag: noindex' );
+        /** @scrutinizer ignore-unhandled */ @header('Content-Type: text/html; charset=' . get_option('blog_charset'));
+        /** @scrutinizer ignore-unhandled */ @header('X-Robots-Tag: noindex');
         send_nosniff_header();
         nocache_headers();
-        status_header( 200 );
+        status_header(200);
     }
     
     public static function add_ajax_events() {
@@ -81,39 +81,39 @@ 
             'buy_items' => true,
         );
 
-        foreach ( $ajax_events as $ajax_event => $nopriv ) {
-            add_action( 'wp_ajax_wpinv_' . $ajax_event, array( __CLASS__, $ajax_event ) );
+        foreach ($ajax_events as $ajax_event => $nopriv) {
+            add_action('wp_ajax_wpinv_' . $ajax_event, array(__CLASS__, $ajax_event));
             
-            if ( !defined( 'WPI_AJAX_' . strtoupper( $nopriv ) ) ) {
-                define( 'WPI_AJAX_' . strtoupper( $nopriv ), 1 );
+            if (!defined('WPI_AJAX_' . strtoupper($nopriv))) {
+                define('WPI_AJAX_' . strtoupper($nopriv), 1);
             }
 
-            if ( $nopriv ) {
-                add_action( 'wp_ajax_nopriv_wpinv_' . $ajax_event, array( __CLASS__, $ajax_event ) );
+            if ($nopriv) {
+                add_action('wp_ajax_nopriv_wpinv_' . $ajax_event, array(__CLASS__, $ajax_event));
 
-                add_action( 'wpinv_ajax_' . $ajax_event, array( __CLASS__, $ajax_event ) );
+                add_action('wpinv_ajax_' . $ajax_event, array(__CLASS__, $ajax_event));
             }
         }
     }
     
     public static function add_note() {
-        check_ajax_referer( 'add-invoice-note', '_nonce' );
+        check_ajax_referer('add-invoice-note', '_nonce');
 
-        if ( ! wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
 
-        $post_id   = absint( $_POST['post_id'] );
-        $note      = wp_kses_post( trim( stripslashes( $_POST['note'] ) ) );
-        $note_type = sanitize_text_field( $_POST['note_type'] );
+        $post_id   = absint($_POST['post_id']);
+        $note      = wp_kses_post(trim(stripslashes($_POST['note'])));
+        $note_type = sanitize_text_field($_POST['note_type']);
 
         $is_customer_note = $note_type == 'customer' ? 1 : 0;
 
-        if ( $post_id > 0 ) {
-            $note_id = wpinv_insert_payment_note( $post_id, $note, $is_customer_note );
+        if ($post_id > 0) {
+            $note_id = wpinv_insert_payment_note($post_id, $note, $is_customer_note);
 
-            if ( $note_id > 0 && !is_wp_error( $note_id ) ) {
-                wpinv_get_invoice_note_line_item( $note_id );
+            if ($note_id > 0 && !is_wp_error($note_id)) {
+                wpinv_get_invoice_note_line_item($note_id);
             }
         }
 
@@ -121,16 +121,16 @@ 
     }
 
     public static function delete_note() {
-        check_ajax_referer( 'delete-invoice-note', '_nonce' );
+        check_ajax_referer('delete-invoice-note', '_nonce');
 
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
 
-        $note_id = (int)$_POST['note_id'];
+        $note_id = (int) $_POST['note_id'];
 
-        if ( $note_id > 0 ) {
-            wp_delete_comment( $note_id, true );
+        if ($note_id > 0) {
+            wp_delete_comment($note_id, true);
         }
 
         die();
@@ -143,8 +143,8 @@ 
     }
     
     public static function checkout() {
-        if ( ! defined( 'WPINV_CHECKOUT' ) ) {
-            define( 'WPINV_CHECKOUT', true );
+        if (!defined('WPINV_CHECKOUT')) {
+            define('WPINV_CHECKOUT', true);
         }
 
         wpinv_process_checkout();
@@ -153,53 +153,53 @@ 
     
     public static function add_invoice_item() {
         global $wpi_userID, $wpinv_ip_address_country;
-        check_ajax_referer( 'invoice-item', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('invoice-item', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $item_id    = sanitize_text_field( $_POST['item_id'] );
-        $invoice_id = absint( $_POST['invoice_id'] );
+        $item_id    = sanitize_text_field($_POST['item_id']);
+        $invoice_id = absint($_POST['invoice_id']);
         
-        if ( !is_numeric( $invoice_id ) || !is_numeric( $item_id ) ) {
+        if (!is_numeric($invoice_id) || !is_numeric($item_id)) {
             die();
         }
         
-        $invoice    = wpinv_get_invoice( $invoice_id );
-        if ( empty( $invoice ) ) {
+        $invoice = wpinv_get_invoice($invoice_id);
+        if (empty($invoice)) {
             die();
         }
         
-        if ( $invoice->is_paid() || $invoice->is_refunded() ) {
+        if ($invoice->is_paid() || $invoice->is_refunded()) {
             die(); // Don't allow modify items for paid invoice.
         }
         
-        if ( !empty( $_POST['user_id'] ) ) {
-            $wpi_userID = absint( $_POST['user_id'] ); 
+        if (!empty($_POST['user_id'])) {
+            $wpi_userID = absint($_POST['user_id']); 
         }
 
-        $item = new WPInv_Item( $item_id );
-        if ( !( !empty( $item ) && $item->post_type == 'wpi_item' ) ) {
+        $item = new WPInv_Item($item_id);
+        if (!(!empty($item) && $item->post_type == 'wpi_item')) {
             die();
         }
         
         // Validate item before adding to invoice because recurring item must be paid individually.
-        if ( !empty( $invoice->cart_details ) ) {
+        if (!empty($invoice->cart_details)) {
             $valid = true;
             
-            if ( $recurring_item = $invoice->get_recurring() ) {
-                if ( $recurring_item != $item_id ) {
+            if ($recurring_item = $invoice->get_recurring()) {
+                if ($recurring_item != $item_id) {
                     $valid = false;
                 }
-            } else if ( wpinv_is_recurring_item( $item_id ) ) {
+            } else if (wpinv_is_recurring_item($item_id)) {
                 $valid = false;
             }
             
-            if ( !$valid ) {
+            if (!$valid) {
                 $response               = array();
                 $response['success']    = false;
-                $response['msg']        = __( 'You can not add item because recurring item must be paid individually!', 'invoicing' );
-                wp_send_json( $response );
+                $response['msg']        = __('You can not add item because recurring item must be paid individually!', 'invoicing');
+                wp_send_json($response);
             }
         }
         
@@ -207,11 +207,11 @@ 
         
         $data                   = array();
         $data['invoice_id']     = $invoice_id;
-        $data['cart_discounts'] = $invoice->get_discounts( true );
+        $data['cart_discounts'] = $invoice->get_discounts(true);
         
-        wpinv_set_checkout_session( $data );
+        wpinv_set_checkout_session($data);
         
-        $quantity = wpinv_item_quantities_enabled() && !empty($_POST['qty']) && (int)$_POST['qty'] > 0 ? (int)$_POST['qty'] : 1;
+        $quantity = wpinv_item_quantities_enabled() && !empty($_POST['qty']) && (int) $_POST['qty'] > 0 ? (int) $_POST['qty'] : 1;
 
         $args = array(
             'id'            => $item_id,
@@ -224,21 +224,21 @@ 
             'fees'          => array()
         );
 
-        $invoice->add_item( $item_id, $args );
+        $invoice->add_item($item_id, $args);
         $invoice->save();
         
-        if ( empty( $_POST['country'] ) ) {
+        if (empty($_POST['country'])) {
             $_POST['country'] = !empty($invoice->country) ? $invoice->country : wpinv_get_default_country();
         }
-        if ( empty( $_POST['state'] ) ) {
+        if (empty($_POST['state'])) {
             $_POST['state'] = $invoice->state;
         }
          
-        $invoice->country   = sanitize_text_field( $_POST['country'] );
-        $invoice->state     = sanitize_text_field( $_POST['state'] );
+        $invoice->country   = sanitize_text_field($_POST['country']);
+        $invoice->state     = sanitize_text_field($_POST['state']);
         
-        $invoice->set( 'country', sanitize_text_field( $_POST['country'] ) );
-        $invoice->set( 'state', sanitize_text_field( $_POST['state'] ) );
+        $invoice->set('country', sanitize_text_field($_POST['country']));
+        $invoice->set('state', sanitize_text_field($_POST['state']));
         
         $wpinv_ip_address_country = $invoice->country;
 
@@ -246,7 +246,7 @@ 
         
         $response                       = array();
         $response['success']            = true;
-        $response['data']['items']      = wpinv_admin_get_line_items( $invoice );
+        $response['data']['items']      = wpinv_admin_get_line_items($invoice);
         $response['data']['subtotal']   = $invoice->get_subtotal();
         $response['data']['subtotalf']  = $invoice->get_subtotal(true);
         $response['data']['tax']        = $invoice->get_tax();
@@ -258,41 +258,41 @@ 
         
         wpinv_set_checkout_session($checkout_session);
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
 
 
     public static function remove_invoice_item() {
         global $wpi_userID, $wpinv_ip_address_country;
         
-        check_ajax_referer( 'invoice-item', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('invoice-item', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $item_id    = sanitize_text_field( $_POST['item_id'] );
-        $invoice_id = absint( $_POST['invoice_id'] );
-        $cart_index = isset( $_POST['index'] ) && $_POST['index'] >= 0 ? $_POST['index'] : false;
+        $item_id    = sanitize_text_field($_POST['item_id']);
+        $invoice_id = absint($_POST['invoice_id']);
+        $cart_index = isset($_POST['index']) && $_POST['index'] >= 0 ? $_POST['index'] : false;
         
-        if ( !is_numeric( $invoice_id ) || !is_numeric( $item_id ) ) {
+        if (!is_numeric($invoice_id) || !is_numeric($item_id)) {
             die();
         }
 
-        $invoice    = wpinv_get_invoice( $invoice_id );
-        if ( empty( $invoice ) ) {
+        $invoice = wpinv_get_invoice($invoice_id);
+        if (empty($invoice)) {
             die();
         }
         
-        if ( $invoice->is_paid() || $invoice->is_refunded() ) {
+        if ($invoice->is_paid() || $invoice->is_refunded()) {
             die(); // Don't allow modify items for paid invoice.
         }
         
-        if ( !empty( $_POST['user_id'] ) ) {
-            $wpi_userID = absint( $_POST['user_id'] ); 
+        if (!empty($_POST['user_id'])) {
+            $wpi_userID = absint($_POST['user_id']); 
         }
 
-        $item       = new WPInv_Item( $item_id );
-        if ( !( !empty( $item ) && $item->post_type == 'wpi_item' ) ) {
+        $item = new WPInv_Item($item_id);
+        if (!(!empty($item) && $item->post_type == 'wpi_item')) {
             die();
         }
         
@@ -300,9 +300,9 @@ 
         
         $data                   = array();
         $data['invoice_id']     = $invoice_id;
-        $data['cart_discounts'] = $invoice->get_discounts( true );
+        $data['cart_discounts'] = $invoice->get_discounts(true);
         
-        wpinv_set_checkout_session( $data );
+        wpinv_set_checkout_session($data);
 
         $args = array(
             'id'         => $item_id,
@@ -310,21 +310,21 @@ 
             'cart_index' => $cart_index
         );
 
-        $invoice->remove_item( $item_id, $args );
+        $invoice->remove_item($item_id, $args);
         $invoice->save();
         
-        if ( empty( $_POST['country'] ) ) {
+        if (empty($_POST['country'])) {
             $_POST['country'] = !empty($invoice->country) ? $invoice->country : wpinv_get_default_country();
         }
-        if ( empty( $_POST['state'] ) ) {
+        if (empty($_POST['state'])) {
             $_POST['state'] = $invoice->state;
         }
          
-        $invoice->country   = sanitize_text_field( $_POST['country'] );
-        $invoice->state     = sanitize_text_field( $_POST['state'] );
+        $invoice->country   = sanitize_text_field($_POST['country']);
+        $invoice->state     = sanitize_text_field($_POST['state']);
         
-        $invoice->set( 'country', sanitize_text_field( $_POST['country'] ) );
-        $invoice->set( 'state', sanitize_text_field( $_POST['state'] ) );
+        $invoice->set('country', sanitize_text_field($_POST['country']));
+        $invoice->set('state', sanitize_text_field($_POST['state']));
         
         $wpinv_ip_address_country = $invoice->country;
         
@@ -332,7 +332,7 @@ 
         
         $response                       = array();
         $response['success']            = true;
-        $response['data']['items']      = wpinv_admin_get_line_items( $invoice );
+        $response['data']['items']      = wpinv_admin_get_line_items($invoice);
         $response['data']['subtotal']   = $invoice->get_subtotal();
         $response['data']['subtotalf']  = $invoice->get_subtotal(true);
         $response['data']['tax']        = $invoice->get_tax();
@@ -344,55 +344,55 @@ 
         
         wpinv_set_checkout_session($checkout_session);
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
     
     public static function create_invoice_item() {
-        check_ajax_referer( 'invoice-item', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('invoice-item', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $invoice_id = absint( $_POST['invoice_id'] );
+        $invoice_id = absint($_POST['invoice_id']);
 
         // Find the item
-        if ( !is_numeric( $invoice_id ) ) {
+        if (!is_numeric($invoice_id)) {
             die();
         }        
         
-        $invoice     = wpinv_get_invoice( $invoice_id );
-        if ( empty( $invoice ) ) {
+        $invoice = wpinv_get_invoice($invoice_id);
+        if (empty($invoice)) {
             die();
         }
         
         // Validate item before adding to invoice because recurring item must be paid individually.
-        if ( !empty( $invoice->cart_details ) && $invoice->get_recurring() ) {
+        if (!empty($invoice->cart_details) && $invoice->get_recurring()) {
             $response               = array();
             $response['success']    = false;
-            $response['msg']        = __( 'You can not add item because recurring item must be paid individually!', 'invoicing' );
-            wp_send_json( $response );
+            $response['msg']        = __('You can not add item because recurring item must be paid individually!', 'invoicing');
+            wp_send_json($response);
         }        
         
-        $save_item = wp_unslash( $_POST['_wpinv_quick'] );
+        $save_item = wp_unslash($_POST['_wpinv_quick']);
         
         $meta               = array();
         $meta['type']       = !empty($save_item['type']) ? sanitize_text_field($save_item['type']) : 'custom';
-        $meta['price']      = !empty($save_item['price']) ? wpinv_sanitize_amount( $save_item['price'] ) : 0;
+        $meta['price']      = !empty($save_item['price']) ? wpinv_sanitize_amount($save_item['price']) : 0;
         $meta['vat_rule']   = !empty($save_item['vat_rule']) ? sanitize_text_field($save_item['vat_rule']) : 'digital';
         $meta['vat_class']  = !empty($save_item['vat_class']) ? sanitize_text_field($save_item['vat_class']) : '_standard';
         
         $data                   = array();
         $data['post_title']     = sanitize_text_field($save_item['name']);
         $data['post_status']    = 'publish';
-        $data['post_excerpt']   = ! empty( $save_item['excerpt'] ) ? wp_kses_post( $save_item['excerpt'] ) : '';
+        $data['post_excerpt']   = !empty($save_item['excerpt']) ? wp_kses_post($save_item['excerpt']) : '';
         $data['meta']           = $meta;
         
         $item = new WPInv_Item();
-        $item->create( $data );
+        $item->create($data);
         
-        if ( !empty( $item ) ) {
+        if (!empty($item)) {
             $_POST['item_id']   = $item->ID;
-            $_POST['qty']       = !empty($save_item['qty']) && $save_item['qty'] > 0 ? (int)$save_item['qty'] : 1;
+            $_POST['qty']       = !empty($save_item['qty']) && $save_item['qty'] > 0 ? (int) $save_item['qty'] : 1;
             
             self::add_invoice_item();
         }
@@ -400,15 +400,15 @@ 
     }
     
     public static function get_billing_details() {
-        check_ajax_referer( 'get-billing-details', '_nonce' );
+        check_ajax_referer('get-billing-details', '_nonce');
         
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
 
-        $user_id            = (int)$_POST['user_id'];
+        $user_id            = (int) $_POST['user_id'];
         $billing_details    = wpinv_get_user_address($user_id);
-        $billing_details    = apply_filters( 'wpinv_fill_billing_details', $billing_details, $user_id );
+        $billing_details    = apply_filters('wpinv_fill_billing_details', $billing_details, $user_id);
         
         if (isset($billing_details['user_id'])) {
             unset($billing_details['user_id']);
@@ -422,20 +422,20 @@ 
         $response['success']                    = true;
         $response['data']['billing_details']    = $billing_details;
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
     
     public static function admin_recalculate_totals() {
         global $wpi_userID, $wpinv_ip_address_country;
         
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('wpinv-nonce', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $invoice_id = absint( $_POST['invoice_id'] );        
-        $invoice    = wpinv_get_invoice( $invoice_id );
-        if ( empty( $invoice ) ) {
+        $invoice_id = absint($_POST['invoice_id']);        
+        $invoice    = wpinv_get_invoice($invoice_id);
+        if (empty($invoice)) {
             die();
         }
 
@@ -443,29 +443,29 @@ 
 
         $data                   = array();
         $data['invoice_id']     = $invoice_id;
-        $data['cart_discounts'] = $invoice->get_discounts( true );
+        $data['cart_discounts'] = $invoice->get_discounts(true);
 
-        wpinv_set_checkout_session( $data );
+        wpinv_set_checkout_session($data);
         
-        if ( !empty( $_POST['user_id'] ) ) {
-            $wpi_userID = absint( $_POST['user_id'] ); 
+        if (!empty($_POST['user_id'])) {
+            $wpi_userID = absint($_POST['user_id']); 
         }
         
-        if ( empty( $_POST['country'] ) ) {
+        if (empty($_POST['country'])) {
             $_POST['country'] = !empty($invoice->country) ? $invoice->country : wpinv_get_default_country();
         }
 
         $disable_taxes = 0;
-        if ( ! empty( $_POST['disable_taxes'] ) ) {
+        if (!empty($_POST['disable_taxes'])) {
             $disable_taxes = 1;
         }
-        $invoice->set( 'disable_taxes', $disable_taxes );
+        $invoice->set('disable_taxes', $disable_taxes);
 
-        $invoice->country = sanitize_text_field( $_POST['country'] );
-        $invoice->set( 'country', sanitize_text_field( $_POST['country'] ) );
-        if ( isset( $_POST['state'] ) ) {
-            $invoice->state = sanitize_text_field( $_POST['state'] );
-            $invoice->set( 'state', sanitize_text_field( $_POST['state'] ) );
+        $invoice->country = sanitize_text_field($_POST['country']);
+        $invoice->set('country', sanitize_text_field($_POST['country']));
+        if (isset($_POST['state'])) {
+            $invoice->state = sanitize_text_field($_POST['state']);
+            $invoice->set('state', sanitize_text_field($_POST['state']));
         }
         
         $wpinv_ip_address_country = $invoice->country;
@@ -474,7 +474,7 @@ 
         
         $response                       = array();
         $response['success']            = true;
-        $response['data']['items']      = wpinv_admin_get_line_items( $invoice );
+        $response['data']['items']      = wpinv_admin_get_line_items($invoice);
         $response['data']['subtotal']   = $invoice->get_subtotal();
         $response['data']['subtotalf']  = $invoice->get_subtotal(true);
         $response['data']['tax']        = $invoice->get_tax();
@@ -486,25 +486,25 @@ 
         
         wpinv_set_checkout_session($checkout_session);
 
-        wp_send_json( $response );
+        wp_send_json($response);
     }
     
     public static function admin_apply_discount() {
         global $wpi_userID;
         
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('wpinv-nonce', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $invoice_id = absint( $_POST['invoice_id'] );
-        $discount_code = sanitize_text_field( $_POST['code'] );
-        if ( empty( $invoice_id ) || empty( $discount_code ) ) {
+        $invoice_id = absint($_POST['invoice_id']);
+        $discount_code = sanitize_text_field($_POST['code']);
+        if (empty($invoice_id) || empty($discount_code)) {
             die();
         }
         
-        $invoice = wpinv_get_invoice( $invoice_id );
-        if ( empty( $invoice ) || ( !empty( $invoice ) && ( $invoice->is_paid() || $invoice->is_refunded() ) ) ) {
+        $invoice = wpinv_get_invoice($invoice_id);
+        if (empty($invoice) || (!empty($invoice) && ($invoice->is_paid() || $invoice->is_refunded()))) {
             die();
         }
         
@@ -512,49 +512,49 @@ 
         
         $data                   = array();
         $data['invoice_id']     = $invoice_id;
-        $data['cart_discounts'] = $invoice->get_discounts( true );
+        $data['cart_discounts'] = $invoice->get_discounts(true);
         
-        wpinv_set_checkout_session( $data );
+        wpinv_set_checkout_session($data);
         
         $response               = array();
         $response['success']    = false;
-        $response['msg']        = __( 'This discount is invalid.', 'invoicing' );
+        $response['msg']        = __('This discount is invalid.', 'invoicing');
         $response['data']['code'] = $discount_code;
         
-        if ( wpinv_is_discount_valid( $discount_code, $invoice->get_user_id() ) ) {
-            $discounts = wpinv_set_cart_discount( $discount_code );
+        if (wpinv_is_discount_valid($discount_code, $invoice->get_user_id())) {
+            $discounts = wpinv_set_cart_discount($discount_code);
             
             $response['success'] = true;
-            $response['msg'] = __( 'Discount has been applied successfully.', 'invoicing' );
-        }  else {
+            $response['msg'] = __('Discount has been applied successfully.', 'invoicing');
+        } else {
             $errors = wpinv_get_errors();
-            if ( !empty( $errors['wpinv-discount-error'] ) ) {
+            if (!empty($errors['wpinv-discount-error'])) {
                 $response['msg'] = $errors['wpinv-discount-error'];
             }
-            wpinv_unset_error( 'wpinv-discount-error' );
+            wpinv_unset_error('wpinv-discount-error');
         }
         
         wpinv_set_checkout_session($checkout_session);
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
     
     public static function admin_remove_discount() {
         global $wpi_userID;
         
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('wpinv-nonce', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $invoice_id = absint( $_POST['invoice_id'] );
-        $discount_code = sanitize_text_field( $_POST['code'] );
-        if ( empty( $invoice_id ) || empty( $discount_code ) ) {
+        $invoice_id = absint($_POST['invoice_id']);
+        $discount_code = sanitize_text_field($_POST['code']);
+        if (empty($invoice_id) || empty($discount_code)) {
             die();
         }
         
-        $invoice = wpinv_get_invoice( $invoice_id );
-        if ( empty( $invoice ) || ( !empty( $invoice ) && ( $invoice->is_paid() || $invoice->is_refunded() ) ) ) {
+        $invoice = wpinv_get_invoice($invoice_id);
+        if (empty($invoice) || (!empty($invoice) && ($invoice->is_paid() || $invoice->is_refunded()))) {
             die();
         }
         
@@ -562,38 +562,38 @@ 
         
         $data                   = array();
         $data['invoice_id']     = $invoice_id;
-        $data['cart_discounts'] = $invoice->get_discounts( true );
+        $data['cart_discounts'] = $invoice->get_discounts(true);
         
-        wpinv_set_checkout_session( $data );
+        wpinv_set_checkout_session($data);
         
         $response               = array();
         $response['success']    = false;
         $response['msg']        = NULL;
         
-        $discounts  = wpinv_unset_cart_discount( $discount_code );
+        $discounts = wpinv_unset_cart_discount($discount_code);
         $response['success'] = true;
-        $response['msg'] = __( 'Discount has been removed successfully.', 'invoicing' );
+        $response['msg'] = __('Discount has been removed successfully.', 'invoicing');
         
         wpinv_set_checkout_session($checkout_session);
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
     
     public static function check_email() {
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('wpinv-nonce', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $email = sanitize_text_field( $_POST['email'] );
+        $email = sanitize_text_field($_POST['email']);
         
         $response = array();
-        if ( is_email( $email ) && email_exists( $email ) && $user_data = get_user_by( 'email', $email ) ) {
+        if (is_email($email) && email_exists($email) && $user_data = get_user_by('email', $email)) {
             $user_id            = $user_data->ID;
             $user_login         = $user_data->user_login;
             $display_name       = $user_data->display_name ? $user_data->display_name : $user_login;
             $billing_details    = wpinv_get_user_address($user_id);
-            $billing_details    = apply_filters( 'wpinv_fill_billing_details', $billing_details, $user_id );
+            $billing_details    = apply_filters('wpinv_fill_billing_details', $billing_details, $user_id);
             
             if (isset($billing_details['user_id'])) {
                 unset($billing_details['user_id']);
@@ -609,54 +609,54 @@ 
             $response['data']['billing_details']    = $billing_details;
         }
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
     
     public static function run_tool() {
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
-        if ( !wpinv_current_user_can_manage_invoicing() ) {
+        check_ajax_referer('wpinv-nonce', '_nonce');
+        if (!wpinv_current_user_can_manage_invoicing()) {
             die(-1);
         }
         
-        $tool = sanitize_text_field( $_POST['tool'] );
+        $tool = sanitize_text_field($_POST['tool']);
         
-        do_action( 'wpinv_run_tool' );
+        do_action('wpinv_run_tool');
         
-        if ( !empty( $tool ) ) {
-            do_action( 'wpinv_tool_' . $tool );
+        if (!empty($tool)) {
+            do_action('wpinv_tool_' . $tool);
         }
     }
     
     public static function apply_discount() {
         global $wpi_userID;
         
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
+        check_ajax_referer('wpinv-nonce', '_nonce');
         
         $response = array();
         
-        if ( isset( $_POST['code'] ) ) {
-            $discount_code = sanitize_text_field( $_POST['code'] );
+        if (isset($_POST['code'])) {
+            $discount_code = sanitize_text_field($_POST['code']);
 
             $response['success']        = false;
             $response['msg']            = '';
             $response['data']['code']   = $discount_code;
             
             $invoice = wpinv_get_invoice_cart();
-            if ( empty( $invoice->ID ) ) {
-                $response['msg'] = __( 'Invalid checkout request.', 'invoicing' );
-                wp_send_json( $response );
+            if (empty($invoice->ID)) {
+                $response['msg'] = __('Invalid checkout request.', 'invoicing');
+                wp_send_json($response);
             }
 
             $wpi_userID = $invoice->get_user_id();
 
-            if ( wpinv_is_discount_valid( $discount_code, $wpi_userID ) ) {
-                $discount       = wpinv_get_discount_by_code( $discount_code );
-                $discounts      = wpinv_set_cart_discount( $discount_code );
-                $amount         = wpinv_format_discount_rate( wpinv_get_discount_type( $discount->ID ), wpinv_get_discount_amount( $discount->ID ) );
-                $total          = wpinv_get_cart_total( null, $discounts );
-                $cart_totals    = wpinv_recalculate_tax( true );
+            if (wpinv_is_discount_valid($discount_code, $wpi_userID)) {
+                $discount       = wpinv_get_discount_by_code($discount_code);
+                $discounts      = wpinv_set_cart_discount($discount_code);
+                $amount         = wpinv_format_discount_rate(wpinv_get_discount_type($discount->ID), wpinv_get_discount_amount($discount->ID));
+                $total          = wpinv_get_cart_total(null, $discounts);
+                $cart_totals    = wpinv_recalculate_tax(true);
             
-                if ( !empty( $cart_totals ) ) {
+                if (!empty($cart_totals)) {
                     $response['success']        = true;
                     $response['data']           = $cart_totals;
                     $response['data']['code']   = $discount_code;
@@ -665,29 +665,29 @@ 
                 }
             } else {
                 $errors = wpinv_get_errors();
-                $response['msg']  = $errors['wpinv-discount-error'];
-                wpinv_unset_error( 'wpinv-discount-error' );
+                $response['msg'] = $errors['wpinv-discount-error'];
+                wpinv_unset_error('wpinv-discount-error');
             }
 
             // Allow for custom discount code handling
-            $response = apply_filters( 'wpinv_ajax_discount_response', $response );
+            $response = apply_filters('wpinv_ajax_discount_response', $response);
         }
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
     
     public static function remove_discount() {
-        check_ajax_referer( 'wpinv-nonce', '_nonce' );
+        check_ajax_referer('wpinv-nonce', '_nonce');
         
         $response = array();
         
-        if ( isset( $_POST['code'] ) ) {
-            $discount_code  = sanitize_text_field( $_POST['code'] );
-            $discounts      = wpinv_unset_cart_discount( $discount_code );
-            $total          = wpinv_get_cart_total( null, $discounts );
-            $cart_totals    = wpinv_recalculate_tax( true );
+        if (isset($_POST['code'])) {
+            $discount_code  = sanitize_text_field($_POST['code']);
+            $discounts      = wpinv_unset_cart_discount($discount_code);
+            $total          = wpinv_get_cart_total(null, $discounts);
+            $cart_totals    = wpinv_recalculate_tax(true);
             
-            if ( !empty( $cart_totals ) ) {
+            if (!empty($cart_totals)) {
                 $response['success']        = true;
                 $response['data']           = $cart_totals;
                 $response['data']['code']   = $discount_code;
@@ -696,10 +696,10 @@ 
             }
             
             // Allow for custom discount code handling
-            $response = apply_filters( 'wpinv_ajax_discount_response', $response );
+            $response = apply_filters('wpinv_ajax_discount_response', $response);
         }
         
-        wp_send_json( $response );
+        wp_send_json($response);
     }
 
     /**
@@ -708,30 +708,30 @@ 
     public static function get_payment_form() {
 
         // Check nonce.
-        if ( ! isset( $_GET['nonce'] ) || ! wp_verify_nonce( $_GET['nonce'], 'getpaid_ajax_form' ) ) {
-            _e( 'Error: Reload the page and try again.', 'invoicing' );
+        if (!isset($_GET['nonce']) || !wp_verify_nonce($_GET['nonce'], 'getpaid_ajax_form')) {
+            _e('Error: Reload the page and try again.', 'invoicing');
             exit;
         }
 
         // Is the request set up correctly?
-		if ( empty( $_GET['form'] ) && empty( $_GET['item'] ) ) {
+		if (empty($_GET['form']) && empty($_GET['item'])) {
 			echo aui()->alert(
 				array(
 					'type'    => 'warning',
-					'content' => __( 'No payment form or item provided', 'invoicing' ),
+					'content' => __('No payment form or item provided', 'invoicing'),
 				)
             );
             exit;
         }
 
         // Payment form or button?
-		if ( ! empty( $_GET['form'] ) ) {
-            echo getpaid_display_payment_form( $_GET['form'] );
-		} else if( $_GET['invoice'] ) {
-		    echo getpaid_display_invoice_payment_form( $_GET['invoice'] );
+		if (!empty($_GET['form'])) {
+            echo getpaid_display_payment_form($_GET['form']);
+		} else if ($_GET['invoice']) {
+		    echo getpaid_display_invoice_payment_form($_GET['invoice']);
         } else {
-			$items = getpaid_convert_items_to_array( $_GET['item'] );
-		    echo getpaid_display_item_payment_form( $items );
+			$items = getpaid_convert_items_to_array($_GET['item']);
+		    echo getpaid_display_item_payment_form($items);
         }
         
         exit;
@@ -747,53 +747,53 @@ 
         global $invoicing, $wpi_checkout_id, $cart_total;
 
         // Check nonce.
-        if ( ! isset( $_POST['wpinv_payment_form'] ) || ! wp_verify_nonce( $_POST['wpinv_payment_form'], 'wpinv_payment_form' ) ) {
-            wp_send_json_error( __( 'Security checks failed.', 'invoicing' ) );
+        if (!isset($_POST['wpinv_payment_form']) || !wp_verify_nonce($_POST['wpinv_payment_form'], 'wpinv_payment_form')) {
+            wp_send_json_error(__('Security checks failed.', 'invoicing'));
         }
 
         // Prepare submitted data...
-        $data = wp_unslash( $_POST );
+        $data = wp_unslash($_POST);
 
         // ... form fields...
-        if ( empty( $data['form_id'] ) || 'publish' != get_post_status( $data['form_id'] ) ) {
-            wp_send_json_error( __( 'This payment form is no longer active.', 'invoicing' ) );
+        if (empty($data['form_id']) || 'publish' != get_post_status($data['form_id'])) {
+            wp_send_json_error(__('This payment form is no longer active.', 'invoicing'));
         }
 
-        if ( empty( $data['billing_email'] ) || ! is_email( $data['billing_email'] ) ) {
-            wp_send_json_error( __( 'Provide a valid billing email.', 'invoicing' ) );
+        if (empty($data['billing_email']) || !is_email($data['billing_email'])) {
+            wp_send_json_error(__('Provide a valid billing email.', 'invoicing'));
         }
 
         $prepared = array(
-            'billing_email'                    => sanitize_email( $data['billing_email'] ),
-            __( 'Billing Email', 'invoicing' ) => sanitize_email( $data['billing_email'] ),
-            __( 'Form Id', 'invoicing' )       => absint( $data['form_id'] ),
+            'billing_email'                    => sanitize_email($data['billing_email']),
+            __('Billing Email', 'invoicing') => sanitize_email($data['billing_email']),
+            __('Form Id', 'invoicing')       => absint($data['form_id']),
         );
 
-        $prepared['billing_email'] = sanitize_email( $data['billing_email'] );
+        $prepared['billing_email'] = sanitize_email($data['billing_email']);
 
-        $fields = $invoicing->form_elements->get_form_elements( $data['form_id'] );
+        $fields = $invoicing->form_elements->get_form_elements($data['form_id']);
 
         // ... and form items.
-        if ( ! empty( $data['invoice_id'] ) ) {
-            $invoice = wpinv_get_invoice( $data['invoice_id'] );
+        if (!empty($data['invoice_id'])) {
+            $invoice = wpinv_get_invoice($data['invoice_id']);
 
-            if ( empty( $invoice ) ) {
-                wp_send_json_error( __( 'Invalid invoice.', 'invoicing' ) );
+            if (empty($invoice)) {
+                wp_send_json_error(__('Invalid invoice.', 'invoicing'));
             }
 
-            if ( $invoice->is_paid() ) {
-                wp_send_json_error( __( 'This invoice has already been paid.', 'invoicing' ) );
+            if ($invoice->is_paid()) {
+                wp_send_json_error(__('This invoice has already been paid.', 'invoicing'));
             }
 
-            $items   = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
+            $items = $invoicing->form_elements->convert_checkout_items($invoice->cart_details, $invoice);
 
         } else {
 
-            if ( isset( $data['form_items'] ) ) {
-                $items = getpaid_convert_items_to_array( $data['form_items'] );
-                $items = $invoicing->form_elements->convert_normal_items( $items );
+            if (isset($data['form_items'])) {
+                $items = getpaid_convert_items_to_array($data['form_items']);
+                $items = $invoicing->form_elements->convert_normal_items($items);
             } else {
-                $items = $invoicing->form_elements->get_form_items( $data['form_id'] );
+                $items = $invoicing->form_elements->get_form_items($data['form_id']);
             }
 
             $invoice = 0;
@@ -802,44 +802,44 @@ 
         $prepared_items = array();
         $address_fields = array();
 
-        if ( ! empty( $data['wpinv-items'] ) ) {
+        if (!empty($data['wpinv-items'])) {
 
-            $selected_items = wpinv_clean( $data['wpinv-items'] );
+            $selected_items = wpinv_clean($data['wpinv-items']);
 
-            foreach ( $items as $item ) {
+            foreach ($items as $item) {
 
-                if ( ! empty( $item['required'] ) && ! isset( $selected_items[ $item['id'] ] ) ) {
-                    wp_send_json_error( __( 'A required item is missing.', 'invoicing' ) );
+                if (!empty($item['required']) && !isset($selected_items[$item['id']])) {
+                    wp_send_json_error(__('A required item is missing.', 'invoicing'));
                 }
 
-                if ( ! isset( $selected_items[ $item['id'] ] ) ) {
+                if (!isset($selected_items[$item['id']])) {
                     continue;
                 }
 
-                $quantity = empty( $item['quantity'] ) ? 1 : absint( $item['quantity'] );
+                $quantity = empty($item['quantity']) ? 1 : absint($item['quantity']);
 
-                if ( ! empty( $item['allow_quantities'] ) && ! empty( $data["wpinv-item-{$item['id']}-quantity"] ) ) {
+                if (!empty($item['allow_quantities']) && !empty($data["wpinv-item-{$item['id']}-quantity"])) {
 
-                    $_quantity = intval( $data["wpinv-item-{$item['id']}-quantity"] );
+                    $_quantity = intval($data["wpinv-item-{$item['id']}-quantity"]);
 
-                    if ( ! empty( $_quantity ) ) {
+                    if (!empty($_quantity)) {
                         $quantity = $_quantity;
                     }
                 }
 
                 // Custom pricing.
-                if ( ! empty( $item['custom_price'] ) ) {
+                if (!empty($item['custom_price'])) {
 
-                    $minimum_price = wpinv_sanitize_amount( $item['minimum_price'] );
-                    $set_price     = wpinv_sanitize_amount( $selected_items[ $item['id'] ] );
+                    $minimum_price = wpinv_sanitize_amount($item['minimum_price']);
+                    $set_price     = wpinv_sanitize_amount($selected_items[$item['id']]);
 
-                    if ( $set_price < $minimum_price ) {
-                        wp_send_json_error( __( 'The provided amount is less than the minimum allowed value.', 'invoicing' ) );
+                    if ($set_price < $minimum_price) {
+                        wp_send_json_error(__('The provided amount is less than the minimum allowed value.', 'invoicing'));
                     }
 
                     $prepared_items[] = array(
                         'id'           =>$item['id'],
-                        'item_price'   => wpinv_sanitize_amount( $item['price'] ),
+                        'item_price'   => wpinv_sanitize_amount($item['price']),
                         'custom_price' => $set_price,
                         'name'         => $item['title'],
                         'quantity'     => $quantity,
@@ -849,8 +849,8 @@ 
 
                     $prepared_items[] = array(
                         'id'           => $item['id'],
-                        'item_price'   => wpinv_sanitize_amount( $item['price'] ),
-                        'custom_price' => wpinv_sanitize_amount( $item['price'] ),
+                        'item_price'   => wpinv_sanitize_amount($item['price']),
+                        'custom_price' => wpinv_sanitize_amount($item['price']),
                         'name'         => $item['title'],
                         'quantity'     => $quantity,
                     );
@@ -861,68 +861,68 @@ 
 
         } else {
 
-            wp_send_json_error( __( 'You have not selected any items.', 'invoicing' ) );
+            wp_send_json_error(__('You have not selected any items.', 'invoicing'));
 
         }
 
         // Are all required fields provided?
-        foreach ( $fields as $field ) {
+        foreach ($fields as $field) {
 
-            if ( ! empty( $field['premade'] ) ) {
+            if (!empty($field['premade'])) {
                 continue;
             }
 
-            if ( ! empty( $field['required'] ) && empty( $data[ $field['id'] ] ) ) {
-                wp_send_json_error( __( 'Some required fields have not been filled.', 'invoicing' ) );
+            if (!empty($field['required']) && empty($data[$field['id']])) {
+                wp_send_json_error(__('Some required fields have not been filled.', 'invoicing'));
             }
 
-            if ( $field['type'] == 'address' ) {
+            if ($field['type'] == 'address') {
 
-                foreach ( $field['fields'] as $address_field ) {
+                foreach ($field['fields'] as $address_field) {
 
-                    if ( empty( $address_field['visible'] ) ) {
+                    if (empty($address_field['visible'])) {
                         continue;
                     }
 
-                    if ( ! empty( $address_field['required'] ) && empty( $data[ $address_field['name'] ] ) ) {
-                        wp_send_json_error( __( 'Some required fields have not been filled.', 'invoicing' ) );
+                    if (!empty($address_field['required']) && empty($data[$address_field['name']])) {
+                        wp_send_json_error(__('Some required fields have not been filled.', 'invoicing'));
                     }
 
-                    if ( isset( $data[ $address_field['name'] ] ) ) {
-                        $label = str_replace( 'wpinv_', '', $address_field['name'] );
-                        $address_fields[ $label ] = wpinv_clean( $data[ $address_field['name'] ] );
+                    if (isset($data[$address_field['name']])) {
+                        $label = str_replace('wpinv_', '', $address_field['name']);
+                        $address_fields[$label] = wpinv_clean($data[$address_field['name']]);
                     }
 
                 }
 
-            } else if ( isset( $data[ $field['id'] ] ) ) {
+            } else if (isset($data[$field['id']])) {
                 $label = $field['id'];
 
-                if ( isset( $field['label'] ) ) {
+                if (isset($field['label'])) {
                     $label = $field['label'];
                 }
 
-                $prepared[ wpinv_clean( $label ) ] = wpinv_clean( $data[ $field['id'] ] );
+                $prepared[wpinv_clean($label)] = wpinv_clean($data[$field['id']]);
             }
 
         }
 
-        $user = get_user_by( 'email', $prepared['billing_email'] );
+        $user = get_user_by('email', $prepared['billing_email']);
 
-        if ( empty( $user ) ) {
-            $user = wpinv_create_user( $prepared['billing_email'] );
+        if (empty($user)) {
+            $user = wpinv_create_user($prepared['billing_email']);
         }
 
-        if ( is_wp_error( $user ) ) {
-            wp_send_json_error( $user->get_error_message() );
+        if (is_wp_error($user)) {
+            wp_send_json_error($user->get_error_message());
         }
 
-        if ( is_numeric( $user ) ) {
-            $user = get_user_by( 'id', $user );
+        if (is_numeric($user)) {
+            $user = get_user_by('id', $user);
         }
 
         // Create the invoice.
-        if ( empty( $invoice ) ) {
+        if (empty($invoice)) {
 
             $invoice = wpinv_insert_invoice(
                 array(
@@ -950,34 +950,34 @@ 
         }
         
 
-        if ( is_wp_error( $invoice ) ) {
-            wp_send_json_error( $invoice->get_error_message() );
+        if (is_wp_error($invoice)) {
+            wp_send_json_error($invoice->get_error_message());
         }
 
-        if ( empty( $invoice ) ) {
-            wp_send_json_error( __( 'Could not create your invoice.', 'invoicing' ) );
+        if (empty($invoice)) {
+            wp_send_json_error(__('Could not create your invoice.', 'invoicing'));
         }
 
-        unset( $prepared['billing_email'] );
-        update_post_meta( $invoice->ID, 'payment_form_data', $prepared );
+        unset($prepared['billing_email']);
+        update_post_meta($invoice->ID, 'payment_form_data', $prepared);
 
         $wpi_checkout_id = $invoice->ID;
         $cart_total = wpinv_price(
             wpinv_format_amount(
-                wpinv_get_cart_total( $invoice->get_cart_details(), NULL, $invoice ) ),
+                wpinv_get_cart_total($invoice->get_cart_details(), NULL, $invoice) ),
                 $invoice->get_currency()
         );
 
         $data                   = array();
         $data['invoice_id']     = $invoice->ID;
-        $data['cart_discounts'] = $invoice->get_discounts( true );
+        $data['cart_discounts'] = $invoice->get_discounts(true);
 
-        wpinv_set_checkout_session( $data );
-        add_filter( 'wp_redirect', array( $invoicing->form_elements, 'send_redirect_response' ) );
-        add_action( 'wpinv_pre_send_back_to_checkout', array( $invoicing->form_elements, 'checkout_error' ) );
+        wpinv_set_checkout_session($data);
+        add_filter('wp_redirect', array($invoicing->form_elements, 'send_redirect_response'));
+        add_action('wpinv_pre_send_back_to_checkout', array($invoicing->form_elements, 'checkout_error'));
         
-        if ( ! defined( 'WPINV_CHECKOUT' ) ) {
-            define( 'WPINV_CHECKOUT', true );
+        if (!defined('WPINV_CHECKOUT')) {
+            define('WPINV_CHECKOUT', true);
         }
 
         wpinv_process_checkout();
@@ -995,51 +995,51 @@ 
     public static function get_payment_form_states_field() {
         global $invoicing;
 
-        if ( empty( $_GET['country'] ) || empty( $_GET['form'] ) ) {
+        if (empty($_GET['country']) || empty($_GET['form'])) {
             exit;
         }
 
-        $elements = $invoicing->form_elements->get_form_elements( $_GET['form'] );
+        $elements = $invoicing->form_elements->get_form_elements($_GET['form']);
 
-        if ( empty( $elements ) ) {
+        if (empty($elements)) {
             exit;
         }
 
         $address_fields = array();
-        foreach ( $elements as $element ) {
-            if ( 'address' === $element['type'] ) {
+        foreach ($elements as $element) {
+            if ('address' === $element['type']) {
                 $address_fields = $element;
                 break;
             }
         }
 
-        if ( empty( $address_fields ) ) {
+        if (empty($address_fields)) {
             exit;
         }
 
-        foreach( $address_fields['fields'] as $address_field ) {
+        foreach ($address_fields['fields'] as $address_field) {
 
-            if ( 'wpinv_state' == $address_field['name'] ) {
+            if ('wpinv_state' == $address_field['name']) {
 
                 $label = $address_field['label'];
 
-                if ( ! empty( $address_field['required'] ) ) {
+                if (!empty($address_field['required'])) {
                     $label .= "<span class='text-danger'> *</span>";
                 }
 
-                $states = wpinv_get_country_states( $_GET['country'] );
+                $states = wpinv_get_country_states($_GET['country']);
 
-                if ( ! empty( $states ) ) {
+                if (!empty($states)) {
 
                     $html = aui()->select(
                             array(
                                 'options'          => $states,
-                                'name'             => esc_attr( $address_field['name'] ),
-                                'id'               => esc_attr( $address_field['name'] ),
-                                'placeholder'      => esc_attr( $address_field['placeholder'] ),
+                                'name'             => esc_attr($address_field['name']),
+                                'id'               => esc_attr($address_field['name']),
+                                'placeholder'      => esc_attr($address_field['placeholder']),
                                 'required'         => (bool) $address_field['required'],
                                 'no_wrap'          => true,
-                                'label'            => wp_kses_post( $label ),
+                                'label'            => wp_kses_post($label),
                                 'select2'          => false,
                             )
                         );
@@ -1048,10 +1048,10 @@ 
 
                     $html = aui()->input(
                             array(
-                                'name'       => esc_attr( $address_field['name'] ),
-                                'id'         => esc_attr( $address_field['name'] ),
+                                'name'       => esc_attr($address_field['name']),
+                                'id'         => esc_attr($address_field['name']),
                                 'required'   => (bool) $address_field['required'],
-                                'label'      => wp_kses_post( $label ),
+                                'label'      => wp_kses_post($label),
                                 'no_wrap'    => true,
                                 'type'       => 'text',
                             )
@@ -1059,7 +1059,7 @@ 
 
                 }
 
-                wp_send_json_success( str_replace( 'sr-only', '', $html ) );
+                wp_send_json_success(str_replace('sr-only', '', $html));
                 exit;
 
             }
@@ -1078,35 +1078,35 @@ 
         global $invoicing;
 
         // Check nonce.
-        check_ajax_referer( 'wpinv_payment_form', 'wpinv_payment_form' );
+        check_ajax_referer('wpinv_payment_form', 'wpinv_payment_form');
 
         // Prepare submitted data...
-        $data = wp_unslash( $_POST );
+        $data = wp_unslash($_POST);
 
         // ... form fields...
-        if ( empty( $data['form_id'] ) || 'publish' != get_post_status( $data['form_id'] ) ) {
+        if (empty($data['form_id']) || 'publish' != get_post_status($data['form_id'])) {
             exit;
         }
 
         // For existing invoices.
-        if ( ! empty( $data['invoice_id'] ) ) {
-            $invoice = wpinv_get_invoice( $data['invoice_id'] );
+        if (!empty($data['invoice_id'])) {
+            $invoice = wpinv_get_invoice($data['invoice_id']);
 
-            if ( empty( $invoice ) ) {
+            if (empty($invoice)) {
                 exit;
             }
 
-            $items   = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
+            $items   = $invoicing->form_elements->convert_checkout_items($invoice->cart_details, $invoice);
             $country = $invoice->country;
             $state   = $invoice->state;
 
         } else {
 
-            if ( isset( $data['form_items'] ) ) {
-                $items = getpaid_convert_items_to_array( $data['form_items'] );
-                $items = $invoicing->form_elements->convert_normal_items( $items );
+            if (isset($data['form_items'])) {
+                $items = getpaid_convert_items_to_array($data['form_items']);
+                $items = $invoicing->form_elements->convert_normal_items($items);
             } else {
-                $items = $invoicing->form_elements->get_form_items( $data['form_id'] );
+                $items = $invoicing->form_elements->get_form_items($data['form_id']);
             }
 
             $country   = wpinv_default_billing_country();
@@ -1118,59 +1118,59 @@ 
         $tax       = 0;
         $sub_total = 0;
 
-        if ( ! empty( $data['wpinv_country'] ) ) {
+        if (!empty($data['wpinv_country'])) {
             $country = $data['wpinv_country'];
         }
 
-        if ( ! empty( $data['wpinv_state'] ) ) {
+        if (!empty($data['wpinv_state'])) {
             $state = $data['wpinv_state'];
         }
 
-        if ( ! empty( $data['wpinv-items'] ) ) {
+        if (!empty($data['wpinv-items'])) {
 
-            $selected_items = wpinv_clean( $data['wpinv-items'] );
+            $selected_items = wpinv_clean($data['wpinv-items']);
 
-            foreach ( $items as $item ) {
+            foreach ($items as $item) {
 
-                if ( ! isset( $selected_items[ $item['id'] ] ) ) {
+                if (!isset($selected_items[$item['id']])) {
                     continue;
                 }
 
-                $quantity = empty( $item['quantity'] ) ? 1 : absint( $item['quantity'] );
+                $quantity = empty($item['quantity']) ? 1 : absint($item['quantity']);
 
-                if ( ! empty( $item['allow_quantities'] ) && ! empty( $data["wpinv-item-{$item['id']}-quantity"] ) ) {
+                if (!empty($item['allow_quantities']) && !empty($data["wpinv-item-{$item['id']}-quantity"])) {
 
-                    $quantity = intval( $data["wpinv-item-{$item['id']}-quantity"] );
+                    $quantity = intval($data["wpinv-item-{$item['id']}-quantity"]);
 
-                    if ( 1 > $quantity ) {
+                    if (1 > $quantity) {
                         $quantity = 1;
                     }
 
                 }
 
                 // Custom pricing.
-                $price = wpinv_sanitize_amount( $item['price'] );
-                if ( ! empty( $item['custom_price'] ) ) {
+                $price = wpinv_sanitize_amount($item['price']);
+                if (!empty($item['custom_price'])) {
 
-                    $minimum_price = wpinv_sanitize_amount( $item['minimum_price'] );
-                    $set_price     = wpinv_sanitize_amount( $selected_items[ $item['id'] ] );
+                    $minimum_price = wpinv_sanitize_amount($item['minimum_price']);
+                    $set_price     = wpinv_sanitize_amount($selected_items[$item['id']]);
 
-                    if ( $set_price < $minimum_price ) {
+                    if ($set_price < $minimum_price) {
                         $set_price = $minimum_price;
                     }
 
-                    $price = wpinv_sanitize_amount( $set_price );
+                    $price = wpinv_sanitize_amount($set_price);
 
                 }
 
-                $price  = $quantity * floatval( $price );
+                $price = $quantity * floatval($price);
 
-                if ( wpinv_use_taxes() ) {
+                if (wpinv_use_taxes()) {
 
-                    $rate = wpinv_get_tax_rate( $country, $state, (int) $item['id'] );
+                    $rate = wpinv_get_tax_rate($country, $state, (int) $item['id']);
 
-                    if ( wpinv_prices_include_tax() ) {
-                        $pre_tax  = ( $price - $price * $rate * 0.01 );
+                    if (wpinv_prices_include_tax()) {
+                        $pre_tax  = ($price - $price * $rate * 0.01);
                         $item_tax = $price - $pre_tax;
                     } else {
                         $pre_tax  = $price;
@@ -1182,17 +1182,17 @@ 
                     $total     = $sub_total + $tax;
 
                 } else {
-                    $total  = $total + $price;
+                    $total = $total + $price;
                 }
 
             }
 
         }
 
-        wp_send_json_success( array(
-            'total'     => wpinv_price( wpinv_format_amount( $total ) ),
-            'tax'       => wpinv_price( wpinv_format_amount( $tax ) ),
-            'sub_total' => wpinv_price( wpinv_format_amount( $sub_total ) ),
+        wp_send_json_success(array(
+            'total'     => wpinv_price(wpinv_format_amount($total)),
+            'tax'       => wpinv_price(wpinv_format_amount($tax)),
+            'sub_total' => wpinv_price(wpinv_format_amount($sub_total)),
         ));
         exit;
     }
@@ -1205,53 +1205,53 @@ 
     public static function buy_items() {
         $user_id = get_current_user_id();
 
-        if ( empty( $user_id ) ) { // If not logged in then lets redirect to the login page
-            wp_send_json( array(
-                'success' => wp_login_url( wp_get_referer() )
-            ) );
+        if (empty($user_id)) { // If not logged in then lets redirect to the login page
+            wp_send_json(array(
+                'success' => wp_login_url(wp_get_referer())
+            ));
         } else {
             // Only check nonce if logged in as it could be cached when logged out.
-            if ( ! isset( $_POST['wpinv_buy_nonce'] ) || ! wp_verify_nonce( $_POST['wpinv_buy_nonce'], 'wpinv_buy_items' ) ) {
-                wp_send_json( array(
-                    'error' => __( 'Security checks failed.', 'invoicing' )
-                ) );
+            if (!isset($_POST['wpinv_buy_nonce']) || !wp_verify_nonce($_POST['wpinv_buy_nonce'], 'wpinv_buy_items')) {
+                wp_send_json(array(
+                    'error' => __('Security checks failed.', 'invoicing')
+                ));
                 wp_die();
             }
 
             // allow to set a custom price through post_id
             $items = $_POST['items'];
-            $related_post_id = isset( $_POST['post_id'] ) ? (int)$_POST['post_id'] : 0;
-            $custom_item_price = $related_post_id ? abs( get_post_meta( $related_post_id, '_wpi_custom_price', true ) ) : 0;
+            $related_post_id = isset($_POST['post_id']) ? (int) $_POST['post_id'] : 0;
+            $custom_item_price = $related_post_id ? abs(get_post_meta($related_post_id, '_wpi_custom_price', true)) : 0;
 
             $cart_items = array();
-            if ( $items ) {
-                $items = explode( ',', $items );
+            if ($items) {
+                $items = explode(',', $items);
 
-                foreach( $items as $item ) {
+                foreach ($items as $item) {
                     $item_id = $item;
                     $quantity = 1;
 
-                    if ( strpos( $item, '|' ) !== false ) {
-                        $item_parts = explode( '|', $item );
+                    if (strpos($item, '|') !== false) {
+                        $item_parts = explode('|', $item);
                         $item_id = $item_parts[0];
                         $quantity = $item_parts[1];
                     }
 
-                    if ( $item_id && $quantity ) {
+                    if ($item_id && $quantity) {
                         $cart_items_arr = array(
-                            'id'            => (int)$item_id,
-                            'quantity'      => (int)$quantity
+                            'id'            => (int) $item_id,
+                            'quantity'      => (int) $quantity
                         );
 
                         // If there is a related post id then add it to meta
-                        if ( $related_post_id ) {
+                        if ($related_post_id) {
                             $cart_items_arr['meta'] = array(
                                 'post_id'   => $related_post_id
                             );
                         }
 
                         // If there is a custom price then set it.
-                        if ( $custom_item_price ) {
+                        if ($custom_item_price) {
                             $cart_items_arr['custom_price'] = $custom_item_price;
                         }
 
@@ -1267,37 +1267,37 @@ 
              * @param int $related_post_id The related post id if any.
              * @since 1.0.0
              */
-            $cart_items = apply_filters( 'wpinv_buy_cart_items', $cart_items, $related_post_id );
+            $cart_items = apply_filters('wpinv_buy_cart_items', $cart_items, $related_post_id);
 
             // Make sure its not in the cart already, if it is then redirect to checkout.
             $cart_invoice = wpinv_get_invoice_cart();
 
-            if ( isset( $cart_invoice->items ) && !empty( $cart_invoice->items ) && !empty( $cart_items ) && serialize( $cart_invoice->items ) == serialize( $cart_items ) ) {
-                wp_send_json( array(
+            if (isset($cart_invoice->items) && !empty($cart_invoice->items) && !empty($cart_items) && serialize($cart_invoice->items) == serialize($cart_items)) {
+                wp_send_json(array(
                     'success' =>  $cart_invoice->get_checkout_payment_url()
-                ) );
+                ));
                 wp_die();
             }
 
             // Check if user has invoice with same items waiting to be paid.
-            $user_invoices = wpinv_get_users_invoices( $user_id , 10 , false , 'wpi-pending' );
-            if ( !empty( $user_invoices ) ) {
-                foreach( $user_invoices as $user_invoice ) {
+            $user_invoices = wpinv_get_users_invoices($user_id, 10, false, 'wpi-pending');
+            if (!empty($user_invoices)) {
+                foreach ($user_invoices as $user_invoice) {
                     $user_cart_details = array();
-                    $invoice  = wpinv_get_invoice( $user_invoice->ID );
+                    $invoice = wpinv_get_invoice($user_invoice->ID);
                     $cart_details = $invoice->get_cart_details();
 
-                    if ( !empty( $cart_details ) ) {
-                        foreach ( $cart_details as $invoice_item ) {
+                    if (!empty($cart_details)) {
+                        foreach ($cart_details as $invoice_item) {
                             $ii_arr = array();
-                            $ii_arr['id'] = (int)$invoice_item['id'];
-                            $ii_arr['quantity'] = (int)$invoice_item['quantity'];
+                            $ii_arr['id'] = (int) $invoice_item['id'];
+                            $ii_arr['quantity'] = (int) $invoice_item['quantity'];
 
-                            if (isset( $invoice_item['meta'] ) && !empty( $invoice_item['meta'] ) ) {
+                            if (isset($invoice_item['meta']) && !empty($invoice_item['meta'])) {
                                 $ii_arr['meta'] = $invoice_item['meta'];
                             }
 
-                            if ( isset( $invoice_item['custom_price'] ) && !empty( $invoice_item['custom_price'] ) ) {
+                            if (isset($invoice_item['custom_price']) && !empty($invoice_item['custom_price'])) {
                                 $ii_arr['custom_price'] = $invoice_item['custom_price'];
                             }
 
@@ -1305,17 +1305,17 @@ 
                         }
                     }
 
-                    if ( !empty( $user_cart_details ) && serialize( $cart_items ) == serialize( $user_cart_details ) ) {
-                        wp_send_json( array(
+                    if (!empty($user_cart_details) && serialize($cart_items) == serialize($user_cart_details)) {
+                        wp_send_json(array(
                             'success' =>  $invoice->get_checkout_payment_url()
-                        ) );
+                        ));
                         wp_die();
                     }
                 }
             }
 
             // Create invoice and send user to checkout
-            if ( !empty( $cart_items ) ) {
+            if (!empty($cart_items)) {
                 $invoice_data = array(
                     'status'        =>  'wpi-pending',
                     'created_via'   =>  'wpi',
@@ -1323,21 +1323,21 @@ 
                     'cart_details'  =>  $cart_items,
                 );
 
-                $invoice = wpinv_insert_invoice( $invoice_data, true );
+                $invoice = wpinv_insert_invoice($invoice_data, true);
 
-                if ( !empty( $invoice ) && isset( $invoice->ID ) ) {
-                    wp_send_json( array(
+                if (!empty($invoice) && isset($invoice->ID)) {
+                    wp_send_json(array(
                         'success' =>  $invoice->get_checkout_payment_url()
-                    ) );
+                    ));
                 } else {
-                    wp_send_json( array(
-                        'error' => __( 'Invoice failed to create', 'invoicing' )
-                    ) );
+                    wp_send_json(array(
+                        'error' => __('Invoice failed to create', 'invoicing')
+                    ));
                 }
             } else {
-                wp_send_json( array(
-                    'error' => __( 'Items not valid.', 'invoicing' )
-                ) );
+                wp_send_json(array(
+                    'error' => __('Items not valid.', 'invoicing')
+                ));
             }
         }
 

includes/wpinv-template-functions.php

Indentation +185 added lines, -185 removed lines

@@ -103,29 +103,29 @@ 
 
 function wpinv_get_template( $template_name, $args = array(), $template_path = '', $default_path = '' ) {
     if ( ! empty( $args ) && is_array( $args ) ) {
-		extract( $args );
-	}
+        extract( $args );
+    }
 
-	$located = wpinv_locate_template( $template_name, $template_path, $default_path );
-	// Allow 3rd party plugin filter template file from their plugin.
-	$located = apply_filters( 'wpinv_get_template', $located, $template_name, $args, $template_path, $default_path );
+    $located = wpinv_locate_template( $template_name, $template_path, $default_path );
+    // Allow 3rd party plugin filter template file from their plugin.
+    $located = apply_filters( 'wpinv_get_template', $located, $template_name, $args, $template_path, $default_path );
 
-	if ( ! file_exists( $located ) ) {
+    if ( ! file_exists( $located ) ) {
         _doing_it_wrong( __FUNCTION__, sprintf( '<code>%s</code> does not exist.', $located ), '2.1' );
-		return;
-	}
+        return;
+    }
 
-	do_action( 'wpinv_before_template_part', $template_name, $template_path, $located, $args );
+    do_action( 'wpinv_before_template_part', $template_name, $template_path, $located, $args );
 
-	include( $located );
+    include( $located );
 
-	do_action( 'wpinv_after_template_part', $template_name, $template_path, $located, $args );
+    do_action( 'wpinv_after_template_part', $template_name, $template_path, $located, $args );
 }
 
 function wpinv_get_template_html( $template_name, $args = array(), $template_path = '', $default_path = '' ) {
-	ob_start();
-	wpinv_get_template( $template_name, $args, $template_path, $default_path );
-	return ob_get_clean();
+    ob_start();
+    wpinv_get_template( $template_name, $args, $template_path, $default_path );
+    return ob_get_clean();
 }
 
 function wpinv_locate_template( $template_name, $template_path = '', $default_path = '' ) {
@@ -155,126 +155,126 @@ 
 }
 
 function wpinv_get_template_part( $slug, $name = null, $load = true ) {
-	do_action( 'get_template_part_' . $slug, $slug, $name );
+    do_action( 'get_template_part_' . $slug, $slug, $name );
 
-	// Setup possible parts
-	$templates = array();
-	if ( isset( $name ) )
-		$templates[] = $slug . '-' . $name . '.php';
-	$templates[] = $slug . '.php';
+    // Setup possible parts
+    $templates = array();
+    if ( isset( $name ) )
+        $templates[] = $slug . '-' . $name . '.php';
+    $templates[] = $slug . '.php';
 
-	// Allow template parts to be filtered
-	$templates = apply_filters( 'wpinv_get_template_part', $templates, $slug, $name );
+    // Allow template parts to be filtered
+    $templates = apply_filters( 'wpinv_get_template_part', $templates, $slug, $name );
 
-	// Return the part that is found
-	return wpinv_locate_tmpl( $templates, $load, false );
+    // Return the part that is found
+    return wpinv_locate_tmpl( $templates, $load, false );
 }
 
 function wpinv_locate_tmpl( $template_names, $load = false, $require_once = true ) {
-	// No file found yet
-	$located = false;
+    // No file found yet
+    $located = false;
 
-	// Try to find a template file
-	foreach ( (array)$template_names as $template_name ) {
+    // Try to find a template file
+    foreach ( (array)$template_names as $template_name ) {
 
-		// Continue if template is empty
-		if ( empty( $template_name ) )
-			continue;
+        // Continue if template is empty
+        if ( empty( $template_name ) )
+            continue;
 
-		// Trim off any slashes from the template name
-		$template_name = ltrim( $template_name, '/' );
+        // Trim off any slashes from the template name
+        $template_name = ltrim( $template_name, '/' );
 
-		// try locating this template file by looping through the template paths
-		foreach( wpinv_get_theme_template_paths() as $template_path ) {
+        // try locating this template file by looping through the template paths
+        foreach( wpinv_get_theme_template_paths() as $template_path ) {
 
-			if( file_exists( $template_path . $template_name ) ) {
-				$located = $template_path . $template_name;
-				break;
-			}
-		}
+            if( file_exists( $template_path . $template_name ) ) {
+                $located = $template_path . $template_name;
+                break;
+            }
+        }
 
-		if( !empty( $located ) ) {
-			break;
-		}
-	}
+        if( !empty( $located ) ) {
+            break;
+        }
+    }
 
-	if ( ( true == $load ) && ! empty( $located ) )
-		load_template( $located, $require_once );
+    if ( ( true == $load ) && ! empty( $located ) )
+        load_template( $located, $require_once );
 
-	return $located;
+    return $located;
 }
 
 function wpinv_get_theme_template_paths() {
-	$template_dir = wpinv_get_theme_template_dir_name();
+    $template_dir = wpinv_get_theme_template_dir_name();
 
-	$file_paths = array(
-		1 => trailingslashit( get_stylesheet_directory() ) . $template_dir,
-		10 => trailingslashit( get_template_directory() ) . $template_dir,
-		100 => wpinv_get_templates_dir()
-	);
+    $file_paths = array(
+        1 => trailingslashit( get_stylesheet_directory() ) . $template_dir,
+        10 => trailingslashit( get_template_directory() ) . $template_dir,
+        100 => wpinv_get_templates_dir()
+    );
 
-	$file_paths = apply_filters( 'wpinv_template_paths', $file_paths );
+    $file_paths = apply_filters( 'wpinv_template_paths', $file_paths );
 
-	// sort the file paths based on priority
-	ksort( $file_paths, SORT_NUMERIC );
+    // sort the file paths based on priority
+    ksort( $file_paths, SORT_NUMERIC );
 
-	return array_map( 'trailingslashit', $file_paths );
+    return array_map( 'trailingslashit', $file_paths );
 }
 
 function wpinv_get_theme_template_dir_name() {
-	return trailingslashit( apply_filters( 'wpinv_templates_dir', 'invoicing' ) );
+    return trailingslashit( apply_filters( 'wpinv_templates_dir', 'invoicing' ) );
 }
 
 function wpinv_checkout_meta_tags() {
 
-	$pages   = array();
-	$pages[] = wpinv_get_option( 'success_page' );
-	$pages[] = wpinv_get_option( 'failure_page' );
-	$pages[] = wpinv_get_option( 'invoice_history_page' );
-	$pages[] = wpinv_get_option( 'invoice_subscription_page' );
+    $pages   = array();
+    $pages[] = wpinv_get_option( 'success_page' );
+    $pages[] = wpinv_get_option( 'failure_page' );
+    $pages[] = wpinv_get_option( 'invoice_history_page' );
+    $pages[] = wpinv_get_option( 'invoice_subscription_page' );
 
-	if( !wpinv_is_checkout() && !is_page( $pages ) ) {
-		return;
-	}
+    if( !wpinv_is_checkout() && !is_page( $pages ) ) {
+        return;
+    }
 
-	echo '<meta name="robots" content="noindex,nofollow" />' . "\n";
+    echo '<meta name="robots" content="noindex,nofollow" />' . "\n";
 }
 add_action( 'wp_head', 'wpinv_checkout_meta_tags' );
 
 function wpinv_add_body_classes( $class ) {
-	$classes = (array)$class;
+    $classes = (array)$class;
 
-	if( wpinv_is_checkout() ) {
-		$classes[] = 'wpinv-checkout';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_checkout() ) {
+        $classes[] = 'wpinv-checkout';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_success_page() ) {
-		$classes[] = 'wpinv-success';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_success_page() ) {
+        $classes[] = 'wpinv-success';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_failed_transaction_page() ) {
-		$classes[] = 'wpinv-failed-transaction';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_failed_transaction_page() ) {
+        $classes[] = 'wpinv-failed-transaction';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_invoice_history_page() ) {
-		$classes[] = 'wpinv-history';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_invoice_history_page() ) {
+        $classes[] = 'wpinv-history';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_subscriptions_history_page() ) {
-		$classes[] = 'wpinv-subscription';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_subscriptions_history_page() ) {
+        $classes[] = 'wpinv-subscription';
+        $classes[] = 'wpinv-page';
+    }
 
-	if( wpinv_is_test_mode() ) {
-		$classes[] = 'wpinv-test-mode';
-		$classes[] = 'wpinv-page';
-	}
+    if( wpinv_is_test_mode() ) {
+        $classes[] = 'wpinv-test-mode';
+        $classes[] = 'wpinv-page';
+    }
 
-	return array_unique( $classes );
+    return array_unique( $classes );
 }
 add_filter( 'body_class', 'wpinv_add_body_classes' );
 
@@ -948,21 +948,21 @@ 
 
     $formatted_address = str_ireplace( array_keys( $replacements ), $replacements, $format );
     
-	// Remove unavailable tags.
+    // Remove unavailable tags.
     $formatted_address = preg_replace( "/\{\{\w+\}\}/", '', $formatted_address );
 
     // Clean up white space.
-	$formatted_address = preg_replace( '/  +/', ' ', trim( $formatted_address ) );
+    $formatted_address = preg_replace( '/  +/', ' ', trim( $formatted_address ) );
     $formatted_address = preg_replace( '/\n\n+/', "\n", $formatted_address );
     
     // Break newlines apart and remove empty lines/trim commas and white space.
-	$formatted_address = array_filter( array_map( 'wpinv_trim_formatted_address_line', explode( "\n", $formatted_address ) ) );
+    $formatted_address = array_filter( array_map( 'wpinv_trim_formatted_address_line', explode( "\n", $formatted_address ) ) );
 
     // Add html breaks.
-	$formatted_address = implode( $separator, $formatted_address );
+    $formatted_address = implode( $separator, $formatted_address );
 
-	// We're done!
-	return $formatted_address;
+    // We're done!
+    return $formatted_address;
     
 }
 
@@ -1049,7 +1049,7 @@ 
 
                     $item       = $item_id ? new WPInv_Item( $item_id ) : NULL;
                     $summary    = '';
-	                $item_name    = '';
+                    $item_name    = '';
                     $cols       = 3;
                     if ( !empty($item) ) {
                         $item_name  = $item->get_name();
@@ -1406,13 +1406,13 @@ 
     $payment_form    = wpinv_get_default_payment_form();
 
     ob_start();
-	    do_action( 'wpinv_checkout_content_before' );
+        do_action( 'wpinv_checkout_content_before' );
 
         if ( wpinv_get_cart_contents() ) {
 
             // Get the form elements and items.
-	        $elements = $invoicing->form_elements->get_form_elements( $payment_form );
-	        $items    = $invoicing->form_elements->convert_checkout_items( wpinv_get_cart_contents(), wpinv_get_invoice_cart() );
+            $elements = $invoicing->form_elements->get_form_elements( $payment_form );
+            $items    = $invoicing->form_elements->convert_checkout_items( wpinv_get_cart_contents(), wpinv_get_invoice_cart() );
             ?>
             <form class="wpinv_payment_form" action="<?php echo $form_action; ?>" method="POST">
                 <?php do_action( 'wpinv_main_checkout_form_top' ); ?>
@@ -1436,10 +1436,10 @@ 
             do_action( 'wpinv_cart_empty' );
         }
         echo '</div><!--end #wpinv_checkout_wrap-->';
-	    do_action( 'wpinv_checkout_content_after' );
+        do_action( 'wpinv_checkout_content_after' );
         $content = ob_get_clean();
 
-		return str_replace( 'sr-only', '', $content );
+        return str_replace( 'sr-only', '', $content );
 }
 
 function wpinv_checkout_cart( $cart_details = array(), $echo = true ) {
@@ -1465,7 +1465,7 @@ 
 add_action( 'wpinv_checkout_cart', 'wpinv_checkout_cart', 10 );
 
 function wpinv_empty_cart_message() {
-	return apply_filters( 'wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __( 'Your cart is empty.', 'invoicing' ) . '</span>' );
+    return apply_filters( 'wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __( 'Your cart is empty.', 'invoicing' ) . '</span>' );
 }
 
 /**
@@ -2303,38 +2303,38 @@ 
     global $invoicing;
 
     // Ensure that it is published.
-	if ( 'publish' != get_post_status( $form ) ) {
-		return aui()->alert(
-			array(
-				'type'    => 'warning',
-				'content' => __( 'This payment form is no longer active', 'invoicing' ),
-			)
-		);
-	}
+    if ( 'publish' != get_post_status( $form ) ) {
+        return aui()->alert(
+            array(
+                'type'    => 'warning',
+                'content' => __( 'This payment form is no longer active', 'invoicing' ),
+            )
+        );
+    }
 
     // Get the form elements and items.
     $form     = absint( $form );
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->get_form_items( $form );
+    $elements = $invoicing->form_elements->get_form_elements( $form );
+    $items    = $invoicing->form_elements->get_form_items( $form );
 
-	ob_start();
-	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
-	echo "<input type='hidden' name='form_id' value='$form'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+    ob_start();
+    echo "<form class='wpinv_payment_form'>";
+    do_action( 'wpinv_payment_form_top' );
+    echo "<input type='hidden' name='form_id' value='$form'/>";
+    wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
+    wp_nonce_field( 'vat_validation', '_wpi_nonce' );
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
-	}
+    foreach ( $elements as $element ) {
+        do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
+        do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+    }
 
-	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
-	echo '</form>';
+    echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
+    do_action( 'wpinv_payment_form_bottom' );
+    echo '</form>';
 
-	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+    $content = ob_get_clean();
+    return str_replace( 'sr-only', '', $content );
 }
 
 /**
@@ -2344,46 +2344,46 @@ 
     global $invoicing;
 
     foreach ( array_keys( $items ) as $id ) {
-	    if ( 'publish' != get_post_status( $id ) ) {
-		    unset( $items[ $id ] );
-	    }
+        if ( 'publish' != get_post_status( $id ) ) {
+            unset( $items[ $id ] );
+        }
     }
 
     if ( empty( $items ) ) {
-		return aui()->alert(
-			array(
-				'type'    => 'warning',
-				'content' => __( 'No published items found', 'invoicing' ),
-			)
-		);
+        return aui()->alert(
+            array(
+                'type'    => 'warning',
+                'content' => __( 'No published items found', 'invoicing' ),
+            )
+        );
     }
 
     $item_key = getpaid_convert_items_to_string( $items );
 
     // Get the form elements and items.
     $form     = wpinv_get_default_payment_form();
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->convert_normal_items( $items );
+    $elements = $invoicing->form_elements->get_form_elements( $form );
+    $items    = $invoicing->form_elements->convert_normal_items( $items );
 
-	ob_start();
-	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
+    ob_start();
+    echo "<form class='wpinv_payment_form'>";
+    do_action( 'wpinv_payment_form_top' );
     echo "<input type='hidden' name='form_id' value='$form'/>";
     echo "<input type='hidden' name='form_items' value='$item_key'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+    wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
+    wp_nonce_field( 'vat_validation', '_wpi_nonce' );
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
-	}
+    foreach ( $elements as $element ) {
+        do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
+        do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+    }
 
-	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
-	echo '</form>';
+    echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
+    do_action( 'wpinv_payment_form_bottom' );
+    echo '</form>';
 
-	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+    $content = ob_get_clean();
+    return str_replace( 'sr-only', '', $content );
 }
 
 /**
@@ -2395,47 +2395,47 @@ 
     $invoice = wpinv_get_invoice( $invoice_id );
 
     if ( empty( $invoice ) ) {
-		return aui()->alert(
-			array(
-				'type'    => 'warning',
-				'content' => __( 'Invoice not found', 'invoicing' ),
-			)
-		);
+        return aui()->alert(
+            array(
+                'type'    => 'warning',
+                'content' => __( 'Invoice not found', 'invoicing' ),
+            )
+        );
     }
 
     if ( $invoice->is_paid() ) {
-		return aui()->alert(
-			array(
-				'type'    => 'warning',
-				'content' => __( 'Invoice has already been paid', 'invoicing' ),
-			)
-		);
+        return aui()->alert(
+            array(
+                'type'    => 'warning',
+                'content' => __( 'Invoice has already been paid', 'invoicing' ),
+            )
+        );
     }
 
     // Get the form elements and items.
     $form     = wpinv_get_default_payment_form();
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
+    $elements = $invoicing->form_elements->get_form_elements( $form );
+    $items    = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
 
-	ob_start();
-	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
+    ob_start();
+    echo "<form class='wpinv_payment_form'>";
+    do_action( 'wpinv_payment_form_top' );
     echo "<input type='hidden' name='form_id' value='$form'/>";
     echo "<input type='hidden' name='invoice_id' value='$invoice_id'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+    wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
+    wp_nonce_field( 'vat_validation', '_wpi_nonce' );
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
-	}
+    foreach ( $elements as $element ) {
+        do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
+        do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+    }
 
-	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
-	echo '</form>';
+    echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
+    do_action( 'wpinv_payment_form_bottom' );
+    echo '</form>';
 
-	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+    $content = ob_get_clean();
+    return str_replace( 'sr-only', '', $content );
 }
 
 /**
@@ -2490,7 +2490,7 @@ 
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-form='$form'>$label</button>"; 
     }
 	
-	if ( ! empty( $items ) ) {
+    if ( ! empty( $items ) ) {
         $items  = esc_attr( $items );
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-item='$items'>$label</button>"; 
     }

Spacing +802 added lines, -802 removed lines

@@ -7,91 +7,91 @@ 
  */
  
 // MUST have WordPress.
-if ( !defined( 'WPINC' ) ) {
-    exit( 'Do NOT access this file directly: ' . basename( __FILE__ ) );
+if (!defined('WPINC')) {
+    exit('Do NOT access this file directly: ' . basename(__FILE__));
 }
 
-if ( !is_admin() ) {
-    add_filter( 'template_include', 'wpinv_template', 10, 1 );
-    add_action( 'wpinv_invoice_print_body_start', 'wpinv_display_invoice_top_bar' );
-    add_action( 'wpinv_invoice_top_bar_left', 'wpinv_invoice_display_left_actions' );
-    add_action( 'wpinv_invoice_top_bar_right', 'wpinv_invoice_display_right_actions' );
+if (!is_admin()) {
+    add_filter('template_include', 'wpinv_template', 10, 1);
+    add_action('wpinv_invoice_print_body_start', 'wpinv_display_invoice_top_bar');
+    add_action('wpinv_invoice_top_bar_left', 'wpinv_invoice_display_left_actions');
+    add_action('wpinv_invoice_top_bar_right', 'wpinv_invoice_display_right_actions');
 }
 
 function wpinv_template_path() {
-    return apply_filters( 'wpinv_template_path', wpinv_get_theme_template_dir_name() );
+    return apply_filters('wpinv_template_path', wpinv_get_theme_template_dir_name());
 }
 
-function wpinv_display_invoice_top_bar( $invoice ) {
-    if ( empty( $invoice ) ) {
+function wpinv_display_invoice_top_bar($invoice) {
+    if (empty($invoice)) {
         return;
     }
     ?>
     <div class="row wpinv-top-bar no-print">
         <div class="container">
             <div class="col-xs-6">
-                <?php do_action( 'wpinv_invoice_top_bar_left', $invoice );?>
+                <?php do_action('wpinv_invoice_top_bar_left', $invoice); ?>
             </div>
             <div class="col-xs-6 text-right">
-                <?php do_action( 'wpinv_invoice_top_bar_right', $invoice );?>
+                <?php do_action('wpinv_invoice_top_bar_right', $invoice); ?>
             </div>
         </div>
     </div>
     <?php
 }
 
-function wpinv_invoice_display_left_actions( $invoice ) {
-    if ( empty( $invoice ) ) {
+function wpinv_invoice_display_left_actions($invoice) {
+    if (empty($invoice)) {
         return; // Exit if invoice is not set.
     }
     
-    if ( $invoice->post_type == 'wpi_invoice' ) {
-        if ( $invoice->needs_payment() ) {
-            ?> <a class="btn btn-success btn-sm" title="<?php esc_attr_e( 'Pay This Invoice', 'invoicing' ); ?>" href="<?php echo esc_url( $invoice->get_checkout_payment_url() ); ?>"><?php _e( 'Pay For Invoice', 'invoicing' ); ?></a><?php
+    if ($invoice->post_type == 'wpi_invoice') {
+        if ($invoice->needs_payment()) {
+            ?> <a class="btn btn-success btn-sm" title="<?php esc_attr_e('Pay This Invoice', 'invoicing'); ?>" href="<?php echo esc_url($invoice->get_checkout_payment_url()); ?>"><?php _e('Pay For Invoice', 'invoicing'); ?></a><?php
         }
     }
     do_action('wpinv_invoice_display_left_actions', $invoice);
 }
 
-function wpinv_invoice_display_right_actions( $invoice ) {
-    if ( empty( $invoice ) ) {
+function wpinv_invoice_display_right_actions($invoice) {
+    if (empty($invoice)) {
         return; // Exit if invoice is not set.
     }
 
-    if ( $invoice->post_type == 'wpi_invoice' ) { ?>
-        <a class="btn btn-primary btn-sm btn-print-invoice" onclick="window.print();" href="javascript:void(0)"><?php _e( 'Print Invoice', 'invoicing' ); ?></a>
-        <?php if ( is_user_logged_in() ) { ?>
-        &nbsp;&nbsp;<a class="btn btn-warning btn-sm btn-invoice-history" href="<?php echo esc_url( wpinv_get_history_page_uri() ); ?>"><?php _e( 'Invoice History', 'invoicing' ); ?></a>
+    if ($invoice->post_type == 'wpi_invoice') { ?>
+        <a class="btn btn-primary btn-sm btn-print-invoice" onclick="window.print();" href="javascript:void(0)"><?php _e('Print Invoice', 'invoicing'); ?></a>
+        <?php if (is_user_logged_in()) { ?>
+        &nbsp;&nbsp;<a class="btn btn-warning btn-sm btn-invoice-history" href="<?php echo esc_url(wpinv_get_history_page_uri()); ?>"><?php _e('Invoice History', 'invoicing'); ?></a>
         <?php }
     }
     do_action('wpinv_invoice_display_right_actions', $invoice);
 }
 
-function wpinv_before_invoice_content( $content ) {
+function wpinv_before_invoice_content($content) {
     global $post;
 
-    if ( !empty( $post ) && $post->post_type == 'wpi_invoice' && is_singular( 'wpi_invoice' ) && is_main_query() ) {
+    if (!empty($post) && $post->post_type == 'wpi_invoice' && is_singular('wpi_invoice') && is_main_query()) {
         ob_start();
-        do_action( 'wpinv_before_invoice_content', $post->ID );
+        do_action('wpinv_before_invoice_content', $post->ID);
         $content = ob_get_clean() . $content;
     }
 
     return $content;
 }
-add_filter( 'the_content', 'wpinv_before_invoice_content' );
+add_filter('the_content', 'wpinv_before_invoice_content');
 
-function wpinv_after_invoice_content( $content ) {
+function wpinv_after_invoice_content($content) {
     global $post;
 
-    if ( !empty( $post ) && $post->post_type == 'wpi_invoice' && is_singular( 'wpi_invoice' ) && is_main_query() ) {
+    if (!empty($post) && $post->post_type == 'wpi_invoice' && is_singular('wpi_invoice') && is_main_query()) {
         ob_start();
-        do_action( 'wpinv_after_invoice_content', $post->ID );
+        do_action('wpinv_after_invoice_content', $post->ID);
         $content .= ob_get_clean();
     }
 
     return $content;
 }
-add_filter( 'the_content', 'wpinv_after_invoice_content' );
+add_filter('the_content', 'wpinv_after_invoice_content');
 
 function wpinv_get_templates_dir() {
     return WPINV_PLUGIN_DIR . 'templates';
@@ -101,105 +101,105 @@ 
     return WPINV_PLUGIN_URL . 'templates';
 }
 
-function wpinv_get_template( $template_name, $args = array(), $template_path = '', $default_path = '' ) {
-    if ( ! empty( $args ) && is_array( $args ) ) {
-		extract( $args );
+function wpinv_get_template($template_name, $args = array(), $template_path = '', $default_path = '') {
+    if (!empty($args) && is_array($args)) {
+		extract($args);
 	}
 
-	$located = wpinv_locate_template( $template_name, $template_path, $default_path );
+	$located = wpinv_locate_template($template_name, $template_path, $default_path);
 	// Allow 3rd party plugin filter template file from their plugin.
-	$located = apply_filters( 'wpinv_get_template', $located, $template_name, $args, $template_path, $default_path );
+	$located = apply_filters('wpinv_get_template', $located, $template_name, $args, $template_path, $default_path);
 
-	if ( ! file_exists( $located ) ) {
-        _doing_it_wrong( __FUNCTION__, sprintf( '<code>%s</code> does not exist.', $located ), '2.1' );
+	if (!file_exists($located)) {
+        _doing_it_wrong(__FUNCTION__, sprintf('<code>%s</code> does not exist.', $located), '2.1');
 		return;
 	}
 
-	do_action( 'wpinv_before_template_part', $template_name, $template_path, $located, $args );
+	do_action('wpinv_before_template_part', $template_name, $template_path, $located, $args);
 
-	include( $located );
+	include($located);
 
-	do_action( 'wpinv_after_template_part', $template_name, $template_path, $located, $args );
+	do_action('wpinv_after_template_part', $template_name, $template_path, $located, $args);
 }
 
-function wpinv_get_template_html( $template_name, $args = array(), $template_path = '', $default_path = '' ) {
+function wpinv_get_template_html($template_name, $args = array(), $template_path = '', $default_path = '') {
 	ob_start();
-	wpinv_get_template( $template_name, $args, $template_path, $default_path );
+	wpinv_get_template($template_name, $args, $template_path, $default_path);
 	return ob_get_clean();
 }
 
-function wpinv_locate_template( $template_name, $template_path = '', $default_path = '' ) {
-    if ( ! $template_path ) {
+function wpinv_locate_template($template_name, $template_path = '', $default_path = '') {
+    if (!$template_path) {
         $template_path = wpinv_template_path();
     }
 
-    if ( ! $default_path ) {
+    if (!$default_path) {
         $default_path = WPINV_PLUGIN_DIR . 'templates/';
     }
 
     // Look within passed path within the theme - this is priority.
     $template = locate_template(
         array(
-            trailingslashit( $template_path ) . $template_name,
+            trailingslashit($template_path) . $template_name,
             $template_name
         )
     );
 
     // Get default templates/
-    if ( !$template && $default_path ) {
-        $template = trailingslashit( $default_path ) . $template_name;
+    if (!$template && $default_path) {
+        $template = trailingslashit($default_path) . $template_name;
     }
 
     // Return what we found.
-    return apply_filters( 'wpinv_locate_template', $template, $template_name, $template_path );
+    return apply_filters('wpinv_locate_template', $template, $template_name, $template_path);
 }
 
-function wpinv_get_template_part( $slug, $name = null, $load = true ) {
-	do_action( 'get_template_part_' . $slug, $slug, $name );
+function wpinv_get_template_part($slug, $name = null, $load = true) {
+	do_action('get_template_part_' . $slug, $slug, $name);
 
 	// Setup possible parts
 	$templates = array();
-	if ( isset( $name ) )
+	if (isset($name))
 		$templates[] = $slug . '-' . $name . '.php';
 	$templates[] = $slug . '.php';
 
 	// Allow template parts to be filtered
-	$templates = apply_filters( 'wpinv_get_template_part', $templates, $slug, $name );
+	$templates = apply_filters('wpinv_get_template_part', $templates, $slug, $name);
 
 	// Return the part that is found
-	return wpinv_locate_tmpl( $templates, $load, false );
+	return wpinv_locate_tmpl($templates, $load, false);
 }
 
-function wpinv_locate_tmpl( $template_names, $load = false, $require_once = true ) {
+function wpinv_locate_tmpl($template_names, $load = false, $require_once = true) {
 	// No file found yet
 	$located = false;
 
 	// Try to find a template file
-	foreach ( (array)$template_names as $template_name ) {
+	foreach ((array) $template_names as $template_name) {
 
 		// Continue if template is empty
-		if ( empty( $template_name ) )
+		if (empty($template_name))
 			continue;
 
 		// Trim off any slashes from the template name
-		$template_name = ltrim( $template_name, '/' );
+		$template_name = ltrim($template_name, '/');
 
 		// try locating this template file by looping through the template paths
-		foreach( wpinv_get_theme_template_paths() as $template_path ) {
+		foreach (wpinv_get_theme_template_paths() as $template_path) {
 
-			if( file_exists( $template_path . $template_name ) ) {
+			if (file_exists($template_path . $template_name)) {
 				$located = $template_path . $template_name;
 				break;
 			}
 		}
 
-		if( !empty( $located ) ) {
+		if (!empty($located)) {
 			break;
 		}
 	}
 
-	if ( ( true == $load ) && ! empty( $located ) )
-		load_template( $located, $require_once );
+	if ((true == $load) && !empty($located))
+		load_template($located, $require_once);
 
 	return $located;
 }
@@ -208,159 +208,159 @@ 
 	$template_dir = wpinv_get_theme_template_dir_name();
 
 	$file_paths = array(
-		1 => trailingslashit( get_stylesheet_directory() ) . $template_dir,
-		10 => trailingslashit( get_template_directory() ) . $template_dir,
+		1 => trailingslashit(get_stylesheet_directory()) . $template_dir,
+		10 => trailingslashit(get_template_directory()) . $template_dir,
 		100 => wpinv_get_templates_dir()
 	);
 
-	$file_paths = apply_filters( 'wpinv_template_paths', $file_paths );
+	$file_paths = apply_filters('wpinv_template_paths', $file_paths);
 
 	// sort the file paths based on priority
-	ksort( $file_paths, SORT_NUMERIC );
+	ksort($file_paths, SORT_NUMERIC);
 
-	return array_map( 'trailingslashit', $file_paths );
+	return array_map('trailingslashit', $file_paths);
 }
 
 function wpinv_get_theme_template_dir_name() {
-	return trailingslashit( apply_filters( 'wpinv_templates_dir', 'invoicing' ) );
+	return trailingslashit(apply_filters('wpinv_templates_dir', 'invoicing'));
 }
 
 function wpinv_checkout_meta_tags() {
 
 	$pages   = array();
-	$pages[] = wpinv_get_option( 'success_page' );
-	$pages[] = wpinv_get_option( 'failure_page' );
-	$pages[] = wpinv_get_option( 'invoice_history_page' );
-	$pages[] = wpinv_get_option( 'invoice_subscription_page' );
+	$pages[] = wpinv_get_option('success_page');
+	$pages[] = wpinv_get_option('failure_page');
+	$pages[] = wpinv_get_option('invoice_history_page');
+	$pages[] = wpinv_get_option('invoice_subscription_page');
 
-	if( !wpinv_is_checkout() && !is_page( $pages ) ) {
+	if (!wpinv_is_checkout() && !is_page($pages)) {
 		return;
 	}
 
 	echo '<meta name="robots" content="noindex,nofollow" />' . "\n";
 }
-add_action( 'wp_head', 'wpinv_checkout_meta_tags' );
+add_action('wp_head', 'wpinv_checkout_meta_tags');
 
-function wpinv_add_body_classes( $class ) {
-	$classes = (array)$class;
+function wpinv_add_body_classes($class) {
+	$classes = (array) $class;
 
-	if( wpinv_is_checkout() ) {
+	if (wpinv_is_checkout()) {
 		$classes[] = 'wpinv-checkout';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_success_page() ) {
+	if (wpinv_is_success_page()) {
 		$classes[] = 'wpinv-success';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_failed_transaction_page() ) {
+	if (wpinv_is_failed_transaction_page()) {
 		$classes[] = 'wpinv-failed-transaction';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_invoice_history_page() ) {
+	if (wpinv_is_invoice_history_page()) {
 		$classes[] = 'wpinv-history';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_subscriptions_history_page() ) {
+	if (wpinv_is_subscriptions_history_page()) {
 		$classes[] = 'wpinv-subscription';
 		$classes[] = 'wpinv-page';
 	}
 
-	if( wpinv_is_test_mode() ) {
+	if (wpinv_is_test_mode()) {
 		$classes[] = 'wpinv-test-mode';
 		$classes[] = 'wpinv-page';
 	}
 
-	return array_unique( $classes );
+	return array_unique($classes);
 }
-add_filter( 'body_class', 'wpinv_add_body_classes' );
+add_filter('body_class', 'wpinv_add_body_classes');
 
-function wpinv_html_dropdown( $name = 'wpinv_discounts', $selected = 0, $status = '' ) {
-    $args = array( 'nopaging' => true );
+function wpinv_html_dropdown($name = 'wpinv_discounts', $selected = 0, $status = '') {
+    $args = array('nopaging' => true);
 
-    if ( ! empty( $status ) )
+    if (!empty($status))
         $args['post_status'] = $status;
 
-    $discounts = wpinv_get_discounts( $args );
+    $discounts = wpinv_get_discounts($args);
     $options   = array();
 
-    if ( $discounts ) {
-        foreach ( $discounts as $discount ) {
-            $options[ absint( $discount->ID ) ] = esc_html( get_the_title( $discount->ID ) );
+    if ($discounts) {
+        foreach ($discounts as $discount) {
+            $options[absint($discount->ID)] = esc_html(get_the_title($discount->ID));
         }
     } else {
-        $options[0] = __( 'No discounts found', 'invoicing' );
+        $options[0] = __('No discounts found', 'invoicing');
     }
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $name,
         'selected'         => $selected,
         'options'          => $options,
         'show_option_all'  => false,
         'show_option_none' => false,
-    ) );
+    ));
 
     return $output;
 }
 
-function wpinv_html_year_dropdown( $name = 'year', $selected = 0, $years_before = 5, $years_after = 0 ) {
-    $current     = date( 'Y' );
-    $start_year  = $current - absint( $years_before );
-    $end_year    = $current + absint( $years_after );
-    $selected    = empty( $selected ) ? date( 'Y' ) : $selected;
+function wpinv_html_year_dropdown($name = 'year', $selected = 0, $years_before = 5, $years_after = 0) {
+    $current     = date('Y');
+    $start_year  = $current - absint($years_before);
+    $end_year    = $current + absint($years_after);
+    $selected    = empty($selected) ? date('Y') : $selected;
     $options     = array();
 
-    while ( $start_year <= $end_year ) {
-        $options[ absint( $start_year ) ] = $start_year;
+    while ($start_year <= $end_year) {
+        $options[absint($start_year)] = $start_year;
         $start_year++;
     }
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $name,
         'selected'         => $selected,
         'options'          => $options,
         'show_option_all'  => false,
         'show_option_none' => false
-    ) );
+    ));
 
     return $output;
 }
 
-function wpinv_html_month_dropdown( $name = 'month', $selected = 0 ) {
+function wpinv_html_month_dropdown($name = 'month', $selected = 0) {
 
     $options = array(
-        '1'  => __( 'January', 'invoicing' ),
-        '2'  => __( 'February', 'invoicing' ),
-        '3'  => __( 'March', 'invoicing' ),
-        '4'  => __( 'April', 'invoicing' ),
-        '5'  => __( 'May', 'invoicing' ),
-        '6'  => __( 'June', 'invoicing' ),
-        '7'  => __( 'July', 'invoicing' ),
-        '8'  => __( 'August', 'invoicing' ),
-        '9'  => __( 'September', 'invoicing' ),
-        '10' => __( 'October', 'invoicing' ),
-        '11' => __( 'November', 'invoicing' ),
-        '12' => __( 'December', 'invoicing' ),
+        '1'  => __('January', 'invoicing'),
+        '2'  => __('February', 'invoicing'),
+        '3'  => __('March', 'invoicing'),
+        '4'  => __('April', 'invoicing'),
+        '5'  => __('May', 'invoicing'),
+        '6'  => __('June', 'invoicing'),
+        '7'  => __('July', 'invoicing'),
+        '8'  => __('August', 'invoicing'),
+        '9'  => __('September', 'invoicing'),
+        '10' => __('October', 'invoicing'),
+        '11' => __('November', 'invoicing'),
+        '12' => __('December', 'invoicing'),
     );
 
     // If no month is selected, default to the current month
-    $selected = empty( $selected ) ? date( 'n' ) : $selected;
+    $selected = empty($selected) ? date('n') : $selected;
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $name,
         'selected'         => $selected,
         'options'          => $options,
         'show_option_all'  => false,
         'show_option_none' => false
-    ) );
+    ));
 
     return $output;
 }
 
-function wpinv_html_select( $args = array() ) {
+function wpinv_html_select($args = array()) {
     $defaults = array(
         'options'          => array(),
         'name'             => null,
@@ -369,8 +369,8 @@ 
         'selected'         => 0,
         'placeholder'      => null,
         'multiple'         => false,
-        'show_option_all'  => _x( 'All', 'all dropdown items', 'invoicing' ),
-        'show_option_none' => _x( 'None', 'no dropdown items', 'invoicing' ),
+        'show_option_all'  => _x('All', 'all dropdown items', 'invoicing'),
+        'show_option_none' => _x('None', 'no dropdown items', 'invoicing'),
         'data'             => array(),
         'onchange'         => null,
         'required'         => false,
@@ -378,74 +378,74 @@ 
         'readonly'         => false,
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
     $data_elements = '';
-    foreach ( $args['data'] as $key => $value ) {
-        $data_elements .= ' data-' . esc_attr( $key ) . '="' . esc_attr( $value ) . '"';
+    foreach ($args['data'] as $key => $value) {
+        $data_elements .= ' data-' . esc_attr($key) . '="' . esc_attr($value) . '"';
     }
 
-    if( $args['multiple'] ) {
+    if ($args['multiple']) {
         $multiple = ' MULTIPLE';
     } else {
         $multiple = '';
     }
 
-    if( $args['placeholder'] ) {
+    if ($args['placeholder']) {
         $placeholder = $args['placeholder'];
     } else {
         $placeholder = '';
     }
     
     $options = '';
-    if( !empty( $args['onchange'] ) ) {
-        $options .= ' onchange="' . esc_attr( $args['onchange'] ) . '"';
+    if (!empty($args['onchange'])) {
+        $options .= ' onchange="' . esc_attr($args['onchange']) . '"';
     }
     
-    if( !empty( $args['required'] ) ) {
+    if (!empty($args['required'])) {
         $options .= ' required="required"';
     }
     
-    if( !empty( $args['disabled'] ) ) {
+    if (!empty($args['disabled'])) {
         $options .= ' disabled';
     }
     
-    if( !empty( $args['readonly'] ) ) {
+    if (!empty($args['readonly'])) {
         $options .= ' readonly';
     }
 
-    $class  = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
-    $output = '<select name="' . esc_attr( $args['name'] ) . '" id="' . esc_attr( $args['id'] ) . '" class="wpinv-select ' . $class . '"' . $multiple . ' data-placeholder="' . $placeholder . '" ' . trim( $options ) . $data_elements . '>';
+    $class  = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
+    $output = '<select name="' . esc_attr($args['name']) . '" id="' . esc_attr($args['id']) . '" class="wpinv-select ' . $class . '"' . $multiple . ' data-placeholder="' . $placeholder . '" ' . trim($options) . $data_elements . '>';
 
-    if ( $args['show_option_all'] ) {
-        if( $args['multiple'] ) {
-            $selected = selected( true, in_array( 0, $args['selected'] ), false );
+    if ($args['show_option_all']) {
+        if ($args['multiple']) {
+            $selected = selected(true, in_array(0, $args['selected']), false);
         } else {
-            $selected = selected( $args['selected'], 0, false );
+            $selected = selected($args['selected'], 0, false);
         }
-        $output .= '<option value="all"' . $selected . '>' . esc_html( $args['show_option_all'] ) . '</option>';
+        $output .= '<option value="all"' . $selected . '>' . esc_html($args['show_option_all']) . '</option>';
     }
 
-    if ( !empty( $args['options'] ) ) {
+    if (!empty($args['options'])) {
 
-        if ( $args['show_option_none'] ) {
-            if( $args['multiple'] ) {
-                $selected = selected( true, in_array( "", $args['selected'] ), false );
+        if ($args['show_option_none']) {
+            if ($args['multiple']) {
+                $selected = selected(true, in_array("", $args['selected']), false);
             } else {
-                $selected = selected( $args['selected'] === "", true, false );
+                $selected = selected($args['selected'] === "", true, false);
             }
-            $output .= '<option value=""' . $selected . '>' . esc_html( $args['show_option_none'] ) . '</option>';
+            $output .= '<option value=""' . $selected . '>' . esc_html($args['show_option_none']) . '</option>';
         }
 
-        foreach( $args['options'] as $key => $option ) {
+        foreach ($args['options'] as $key => $option) {
 
-            if( $args['multiple'] && is_array( $args['selected'] ) ) {
-                $selected = selected( true, (bool)in_array( $key, $args['selected'] ), false );
+            if ($args['multiple'] && is_array($args['selected'])) {
+                $selected = selected(true, (bool) in_array($key, $args['selected']), false);
             } else {
-                $selected = selected( $args['selected'], $key, false );
+                $selected = selected($args['selected'], $key, false);
             }
 
-            $output .= '<option value="' . esc_attr( $key ) . '"' . $selected . '>' . esc_html( $option ) . '</option>';
+            $output .= '<option value="' . esc_attr($key) . '"' . $selected . '>' . esc_html($option) . '</option>';
         }
     }
 
@@ -454,7 +454,7 @@ 
     return $output;
 }
 
-function wpinv_item_dropdown( $args = array() ) {
+function wpinv_item_dropdown($args = array()) {
     $defaults = array(
         'name'              => 'wpi_item',
         'id'                => 'wpi_item',
@@ -462,14 +462,14 @@ 
         'multiple'          => false,
         'selected'          => 0,
         'number'            => 100,
-        'placeholder'       => __( 'Choose a item', 'invoicing' ),
-        'data'              => array( 'search-type' => 'item' ),
+        'placeholder'       => __('Choose a item', 'invoicing'),
+        'data'              => array('search-type' => 'item'),
         'show_option_all'   => false,
         'show_option_none'  => false,
         'show_recurring'    => false,
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
     $item_args = array(
         'post_type'      => 'wpi_item',
@@ -478,44 +478,44 @@ 
         'posts_per_page' => $args['number']
     );
 
-    $item_args  = apply_filters( 'wpinv_item_dropdown_query_args', $item_args, $args, $defaults );
+    $item_args  = apply_filters('wpinv_item_dropdown_query_args', $item_args, $args, $defaults);
 
-    $items      = get_posts( $item_args );
+    $items      = get_posts($item_args);
     $options    = array();
-    if ( $items ) {
-        foreach ( $items as $item ) {
-            $title = esc_html( $item->post_title );
+    if ($items) {
+        foreach ($items as $item) {
+            $title = esc_html($item->post_title);
             
-            if ( !empty( $args['show_recurring'] ) ) {
-                $title .= wpinv_get_item_suffix( $item->ID, false );
+            if (!empty($args['show_recurring'])) {
+                $title .= wpinv_get_item_suffix($item->ID, false);
             }
             
-            $options[ absint( $item->ID ) ] = $title;
+            $options[absint($item->ID)] = $title;
         }
     }
 
     // This ensures that any selected items are included in the drop down
-    if( is_array( $args['selected'] ) ) {
-        foreach( $args['selected'] as $item ) {
-            if( ! in_array( $item, $options ) ) {
-                $title = get_the_title( $item );
-                if ( !empty( $args['show_recurring'] ) ) {
-                    $title .= wpinv_get_item_suffix( $item, false );
+    if (is_array($args['selected'])) {
+        foreach ($args['selected'] as $item) {
+            if (!in_array($item, $options)) {
+                $title = get_the_title($item);
+                if (!empty($args['show_recurring'])) {
+                    $title .= wpinv_get_item_suffix($item, false);
                 }
                 $options[$item] = $title;
             }
         }
-    } elseif ( is_numeric( $args['selected'] ) && $args['selected'] !== 0 ) {
-        if ( ! in_array( $args['selected'], $options ) ) {
-            $title = get_the_title( $args['selected'] );
-            if ( !empty( $args['show_recurring'] ) ) {
-                $title .= wpinv_get_item_suffix( $args['selected'], false );
+    } elseif (is_numeric($args['selected']) && $args['selected'] !== 0) {
+        if (!in_array($args['selected'], $options)) {
+            $title = get_the_title($args['selected']);
+            if (!empty($args['show_recurring'])) {
+                $title .= wpinv_get_item_suffix($args['selected'], false);
             }
-            $options[$args['selected']] = get_the_title( $args['selected'] );
+            $options[$args['selected']] = get_the_title($args['selected']);
         }
     }
 
-    $output = wpinv_html_select( array(
+    $output = wpinv_html_select(array(
         'name'             => $args['name'],
         'selected'         => $args['selected'],
         'id'               => $args['id'],
@@ -526,12 +526,12 @@ 
         'show_option_all'  => $args['show_option_all'],
         'show_option_none' => $args['show_option_none'],
         'data'             => $args['data'],
-    ) );
+    ));
 
     return $output;
 }
 
-function wpinv_html_checkbox( $args = array() ) {
+function wpinv_html_checkbox($args = array()) {
     $defaults = array(
         'name'     => null,
         'current'  => null,
@@ -542,38 +542,38 @@ 
         )
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
-    $class = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
+    $class = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
     $options = '';
-    if ( ! empty( $args['options']['disabled'] ) ) {
+    if (!empty($args['options']['disabled'])) {
         $options .= ' disabled="disabled"';
-    } elseif ( ! empty( $args['options']['readonly'] ) ) {
+    } elseif (!empty($args['options']['readonly'])) {
         $options .= ' readonly';
     }
 
-    $output = '<input type="checkbox"' . $options . ' name="' . esc_attr( $args['name'] ) . '" id="' . esc_attr( $args['name'] ) . '" class="' . $class . ' ' . esc_attr( $args['name'] ) . '" ' . checked( 1, $args['current'], false ) . ' />';
+    $output = '<input type="checkbox"' . $options . ' name="' . esc_attr($args['name']) . '" id="' . esc_attr($args['name']) . '" class="' . $class . ' ' . esc_attr($args['name']) . '" ' . checked(1, $args['current'], false) . ' />';
 
     return $output;
 }
 
-function wpinv_html_text( $args = array() ) {
+function wpinv_html_text($args = array()) {
     // Backwards compatibility
-    if ( func_num_args() > 1 ) {
+    if (func_num_args() > 1) {
         $args = func_get_args();
 
         $name  = $args[0];
-        $value = isset( $args[1] ) ? $args[1] : '';
-        $label = isset( $args[2] ) ? $args[2] : '';
-        $desc  = isset( $args[3] ) ? $args[3] : '';
+        $value = isset($args[1]) ? $args[1] : '';
+        $label = isset($args[2]) ? $args[2] : '';
+        $desc  = isset($args[3]) ? $args[3] : '';
     }
 
     $defaults = array(
         'id'           => '',
-        'name'         => isset( $name )  ? $name  : 'text',
-        'value'        => isset( $value ) ? $value : null,
-        'label'        => isset( $label ) ? $label : null,
-        'desc'         => isset( $desc )  ? $desc  : null,
+        'name'         => isset($name) ? $name : 'text',
+        'value'        => isset($value) ? $value : null,
+        'label'        => isset($label) ? $label : null,
+        'desc'         => isset($desc) ? $desc : null,
         'placeholder'  => '',
         'class'        => 'regular-text',
         'disabled'     => false,
@@ -583,51 +583,51 @@ 
         'data'         => false
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
-    $class = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
+    $class = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
     $options = '';
-    if( $args['required'] ) {
+    if ($args['required']) {
         $options .= ' required="required"';
     }
-    if( $args['readonly'] ) {
+    if ($args['readonly']) {
         $options .= ' readonly';
     }
-    if( $args['readonly'] ) {
+    if ($args['readonly']) {
         $options .= ' readonly';
     }
 
     $data = '';
-    if ( !empty( $args['data'] ) ) {
-        foreach ( $args['data'] as $key => $value ) {
-            $data .= 'data-' . wpinv_sanitize_key( $key ) . '="' . esc_attr( $value ) . '" ';
+    if (!empty($args['data'])) {
+        foreach ($args['data'] as $key => $value) {
+            $data .= 'data-' . wpinv_sanitize_key($key) . '="' . esc_attr($value) . '" ';
         }
     }
 
-    $output = '<span id="wpinv-' . wpinv_sanitize_key( $args['name'] ) . '-wrap">';
-    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key( $args['id'] ) . '">' . esc_html( $args['label'] ) . '</label>';
-    if ( ! empty( $args['desc'] ) ) {
-        $output .= '<span class="wpinv-description">' . esc_html( $args['desc'] ) . '</span>';
+    $output = '<span id="wpinv-' . wpinv_sanitize_key($args['name']) . '-wrap">';
+    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key($args['id']) . '">' . esc_html($args['label']) . '</label>';
+    if (!empty($args['desc'])) {
+        $output .= '<span class="wpinv-description">' . esc_html($args['desc']) . '</span>';
     }
 
-    $output .= '<input type="text" name="' . esc_attr( $args['name'] ) . '" id="' . esc_attr( $args['id'] )  . '" autocomplete="' . esc_attr( $args['autocomplete'] )  . '" value="' . esc_attr( $args['value'] ) . '" placeholder="' . esc_attr( $args['placeholder'] ) . '" class="' . $class . '" ' . $data . ' ' . trim( $options ) . '/>';
+    $output .= '<input type="text" name="' . esc_attr($args['name']) . '" id="' . esc_attr($args['id']) . '" autocomplete="' . esc_attr($args['autocomplete']) . '" value="' . esc_attr($args['value']) . '" placeholder="' . esc_attr($args['placeholder']) . '" class="' . $class . '" ' . $data . ' ' . trim($options) . '/>';
 
     $output .= '</span>';
 
     return $output;
 }
 
-function wpinv_html_date_field( $args = array() ) {
-    if( empty( $args['class'] ) ) {
+function wpinv_html_date_field($args = array()) {
+    if (empty($args['class'])) {
         $args['class'] = 'wpiDatepicker';
-    } elseif( ! strpos( $args['class'], 'wpiDatepicker' ) ) {
+    } elseif (!strpos($args['class'], 'wpiDatepicker')) {
         $args['class'] .= ' wpiDatepicker';
     }
 
-    return wpinv_html_text( $args );
+    return wpinv_html_text($args);
 }
 
-function wpinv_html_textarea( $args = array() ) {
+function wpinv_html_textarea($args = array()) {
     $defaults = array(
         'name'        => 'textarea',
         'value'       => null,
@@ -638,31 +638,31 @@ 
         'placeholder' => '',
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
-    $class = implode( ' ', array_map( 'sanitize_html_class', explode( ' ', $args['class'] ) ) );
+    $class = implode(' ', array_map('sanitize_html_class', explode(' ', $args['class'])));
     $disabled = '';
-    if( $args['disabled'] ) {
+    if ($args['disabled']) {
         $disabled = ' disabled="disabled"';
     }
 
-    $output = '<span id="wpinv-' . wpinv_sanitize_key( $args['name'] ) . '-wrap">';
-    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key( $args['name'] ) . '">' . esc_html( $args['label'] ) . '</label>';
-    $output .= '<textarea name="' . esc_attr( $args['name'] ) . '" placeholder="' . esc_attr( $args['placeholder'] ) . '" id="' . wpinv_sanitize_key( $args['name'] ) . '" class="' . $class . '"' . $disabled . '>' . esc_attr( $args['value'] ) . '</textarea>';
+    $output = '<span id="wpinv-' . wpinv_sanitize_key($args['name']) . '-wrap">';
+    $output .= '<label class="wpinv-label" for="' . wpinv_sanitize_key($args['name']) . '">' . esc_html($args['label']) . '</label>';
+    $output .= '<textarea name="' . esc_attr($args['name']) . '" placeholder="' . esc_attr($args['placeholder']) . '" id="' . wpinv_sanitize_key($args['name']) . '" class="' . $class . '"' . $disabled . '>' . esc_attr($args['value']) . '</textarea>';
 
-    if ( ! empty( $args['desc'] ) ) {
-        $output .= '<span class="wpinv-description">' . esc_html( $args['desc'] ) . '</span>';
+    if (!empty($args['desc'])) {
+        $output .= '<span class="wpinv-description">' . esc_html($args['desc']) . '</span>';
     }
     $output .= '</span>';
 
     return $output;
 }
 
-function wpinv_html_ajax_user_search( $args = array() ) {
+function wpinv_html_ajax_user_search($args = array()) {
     $defaults = array(
         'name'        => 'user_id',
         'value'       => null,
-        'placeholder' => __( 'Enter username', 'invoicing' ),
+        'placeholder' => __('Enter username', 'invoicing'),
         'label'       => null,
         'desc'        => null,
         'class'       => '',
@@ -671,13 +671,13 @@ 
         'data'        => false
     );
 
-    $args = wp_parse_args( $args, $defaults );
+    $args = wp_parse_args($args, $defaults);
 
     $args['class'] = 'wpinv-ajax-user-search ' . $args['class'];
 
     $output  = '<span class="wpinv_user_search_wrap">';
-        $output .= wpinv_html_text( $args );
-        $output .= '<span class="wpinv_user_search_results hidden"><a class="wpinv-ajax-user-cancel" title="' . __( 'Cancel', 'invoicing' ) . '" aria-label="' . __( 'Cancel', 'invoicing' ) . '" href="#">x</a><span></span></span>';
+        $output .= wpinv_html_text($args);
+        $output .= '<span class="wpinv_user_search_results hidden"><a class="wpinv-ajax-user-cancel" title="' . __('Cancel', 'invoicing') . '" aria-label="' . __('Cancel', 'invoicing') . '" href="#">x</a><span></span></span>';
     $output .= '</span>';
 
     return $output;
@@ -686,7 +686,7 @@ 
 function wpinv_ip_geolocation() {
     global $wpinv_euvat;
     
-    $ip         = !empty( $_GET['ip'] ) ? sanitize_text_field( $_GET['ip'] ) : '';    
+    $ip         = !empty($_GET['ip']) ? sanitize_text_field($_GET['ip']) : '';    
     $content    = '';
     $iso        = '';
     $country    = '';
@@ -697,69 +697,69 @@ 
     $credit     = '';
     $address    = '';
     
-    if ( wpinv_get_option( 'vat_ip_lookup' ) == 'geoip2' && $geoip2_city = $wpinv_euvat->geoip2_city_record( $ip ) ) {
+    if (wpinv_get_option('vat_ip_lookup') == 'geoip2' && $geoip2_city = $wpinv_euvat->geoip2_city_record($ip)) {
         try {
             $iso        = $geoip2_city->country->isoCode;
             $country    = $geoip2_city->country->name;
-            $region     = !empty( $geoip2_city->subdivisions ) && !empty( $geoip2_city->subdivisions[0]->name ) ? $geoip2_city->subdivisions[0]->name : '';
+            $region     = !empty($geoip2_city->subdivisions) && !empty($geoip2_city->subdivisions[0]->name) ? $geoip2_city->subdivisions[0]->name : '';
             $city       = $geoip2_city->city->name;
             $longitude  = $geoip2_city->location->longitude;
             $latitude   = $geoip2_city->location->latitude;
-            $credit     = __( 'Geolocated using the information by MaxMind, available from <a href="http://www.maxmind.com" target="_blank">www.maxmind.com</a>', 'invoicing' );
-        } catch( Exception $e ) { }
+            $credit     = __('Geolocated using the information by MaxMind, available from <a href="http://www.maxmind.com" target="_blank">www.maxmind.com</a>', 'invoicing');
+        } catch (Exception $e) { }
     }
     
-    if ( !( $iso && $longitude && $latitude ) && function_exists( 'simplexml_load_file' ) ) {
+    if (!($iso && $longitude && $latitude) && function_exists('simplexml_load_file')) {
         try {
-            $load_xml = simplexml_load_file( 'http://www.geoplugin.net/xml.gp?ip=' . $ip );
+            $load_xml = simplexml_load_file('http://www.geoplugin.net/xml.gp?ip=' . $ip);
             
-            if ( !empty( $load_xml ) && isset( $load_xml->geoplugin_countryCode ) && !empty( $load_xml->geoplugin_latitude ) && !empty( $load_xml->geoplugin_longitude ) ) {
+            if (!empty($load_xml) && isset($load_xml->geoplugin_countryCode) && !empty($load_xml->geoplugin_latitude) && !empty($load_xml->geoplugin_longitude)) {
                 $iso        = $load_xml->geoplugin_countryCode;
                 $country    = $load_xml->geoplugin_countryName;
-                $region     = !empty( $load_xml->geoplugin_regionName ) ? $load_xml->geoplugin_regionName : '';
-                $city       = !empty( $load_xml->geoplugin_city ) ? $load_xml->geoplugin_city : '';
+                $region     = !empty($load_xml->geoplugin_regionName) ? $load_xml->geoplugin_regionName : '';
+                $city       = !empty($load_xml->geoplugin_city) ? $load_xml->geoplugin_city : '';
                 $longitude  = $load_xml->geoplugin_longitude;
                 $latitude   = $load_xml->geoplugin_latitude;
                 $credit     = $load_xml->geoplugin_credit;
-                $credit     = __( 'Geolocated using the information by geoPlugin, available from <a href="http://www.geoplugin.com" target="_blank">www.geoplugin.com</a>', 'invoicing' ) . '<br>' . $load_xml->geoplugin_credit;
+                $credit     = __('Geolocated using the information by geoPlugin, available from <a href="http://www.geoplugin.com" target="_blank">www.geoplugin.com</a>', 'invoicing') . '<br>' . $load_xml->geoplugin_credit;
             }
-        } catch( Exception $e ) { }
+        } catch (Exception $e) { }
     }
     
-    if ( $iso && $longitude && $latitude ) {
-        if ( $city ) {
+    if ($iso && $longitude && $latitude) {
+        if ($city) {
             $address .= $city . ', ';
         }
         
-        if ( $region ) {
+        if ($region) {
             $address .= $region . ', ';
         }
         
         $address .= $country . ' (' . $iso . ')';
-        $content = '<p>'. sprintf( __( '<b>Address:</b> %s', 'invoicing' ), $address ) . '</p>';
-        $content .= '<p>'. $credit . '</p>';
+        $content = '<p>' . sprintf(__('<b>Address:</b> %s', 'invoicing'), $address) . '</p>';
+        $content .= '<p>' . $credit . '</p>';
     } else {
-        $content = '<p>'. sprintf( __( 'Unable to find geolocation for the IP address: %s', 'invoicing' ), $ip ) . '</p>';
+        $content = '<p>' . sprintf(__('Unable to find geolocation for the IP address: %s', 'invoicing'), $ip) . '</p>';
     }
     ?>
 <!DOCTYPE html>
-<html><head><title><?php echo sprintf( __( 'IP: %s', 'invoicing' ), $ip );?></title><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/leaflet/1.0.0-rc.1/leaflet.css" /><style>html,body{height:100%;margin:0;padding:0;width:100%}body{text-align:center;background:#fff;color:#222;font-size:small;}body,p{font-family: arial,sans-serif}#map{margin:auto;width:100%;height:calc(100% - 120px);min-height:240px}</style></head>
+<html><head><title><?php echo sprintf(__('IP: %s', 'invoicing'), $ip); ?></title><meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/leaflet/1.0.0-rc.1/leaflet.css" /><style>html,body{height:100%;margin:0;padding:0;width:100%}body{text-align:center;background:#fff;color:#222;font-size:small;}body,p{font-family: arial,sans-serif}#map{margin:auto;width:100%;height:calc(100% - 120px);min-height:240px}</style></head>
 <body>
-    <?php if ( $latitude && $latitude ) { ?>
+    <?php if ($latitude && $latitude) { ?>
     <div id="map"></div>
         <script src="//cdnjs.cloudflare.com/ajax/libs/leaflet/1.0.0-rc.1/leaflet.js"></script>
         <script type="text/javascript">
         var osmUrl = 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
             osmAttrib = '&copy; <a href="http://openstreetmap.org/copyright">OpenStreetMap</a> contributors',
             osm = L.tileLayer(osmUrl, {maxZoom: 18, attribution: osmAttrib}),
-            latlng = new L.LatLng(<?php echo $latitude;?>, <?php echo $longitude;?>);
+            latlng = new L.LatLng(<?php echo $latitude; ?>, <?php echo $longitude; ?>);
 
         var map = new L.Map('map', {center: latlng, zoom: 12, layers: [osm]});
 
         var marker = new L.Marker(latlng);
         map.addLayer(marker);
 
-        marker.bindPopup("<p><?php esc_attr_e( $address );?></p>");
+        marker.bindPopup("<p><?php esc_attr_e($address); ?></p>");
     </script>
     <?php } ?>
     <div style="height:100px"><?php echo $content; ?></div>
@@ -767,18 +767,18 @@ 
 <?php
     exit;
 }
-add_action( 'wp_ajax_wpinv_ip_geolocation', 'wpinv_ip_geolocation' );
-add_action( 'wp_ajax_nopriv_wpinv_ip_geolocation', 'wpinv_ip_geolocation' );
+add_action('wp_ajax_wpinv_ip_geolocation', 'wpinv_ip_geolocation');
+add_action('wp_ajax_nopriv_wpinv_ip_geolocation', 'wpinv_ip_geolocation');
 
 // Set up the template for the invoice.
-function wpinv_template( $template ) {
+function wpinv_template($template) {
     global $post, $wp_query;
     
-    if ( ( is_single() || is_404() ) && !empty( $post->ID ) && (get_post_type( $post->ID ) == 'wpi_invoice' or get_post_type( $post->ID ) == 'wpi_quote')) {
-        if ( wpinv_user_can_view_invoice( $post->ID ) ) {
-            $template = wpinv_get_template_part( 'wpinv-invoice-print', false, false );
+    if ((is_single() || is_404()) && !empty($post->ID) && (get_post_type($post->ID) == 'wpi_invoice' or get_post_type($post->ID) == 'wpi_quote')) {
+        if (wpinv_user_can_view_invoice($post->ID)) {
+            $template = wpinv_get_template_part('wpinv-invoice-print', false, false);
         } else {
-            $template = wpinv_get_template_part( 'wpinv-invalid-access', false, false );
+            $template = wpinv_get_template_part('wpinv-invalid-access', false, false);
         }
     }
 
@@ -787,7 +787,7 @@ 
 
 function wpinv_get_business_address() {
     $business_address   = wpinv_store_address();
-    $business_address   = !empty( $business_address ) ? wpautop( wp_kses_post( $business_address ) ) : '';
+    $business_address   = !empty($business_address) ? wpautop(wp_kses_post($business_address)) : '';
     
     /*
     $default_country    = wpinv_get_default_country();
@@ -811,7 +811,7 @@ 
     
     $business_address = $business_address ? '<div class="address">' . $business_address . '</div>' : '';
     
-    return apply_filters( 'wpinv_get_business_address', $business_address );
+    return apply_filters('wpinv_get_business_address', $business_address);
 }
 
 function wpinv_display_from_address() {
@@ -821,107 +821,107 @@ 
     if (empty($from_name)) {
         $from_name = wpinv_get_business_name();
     }
-    ?><div class="from col-xs-2"><strong><?php _e( 'From:', 'invoicing' ) ?></strong></div>
+    ?><div class="from col-xs-2"><strong><?php _e('From:', 'invoicing') ?></strong></div>
     <div class="wrapper col-xs-10">
-        <div class="name"><?php echo esc_html( $from_name ); ?></div>
-        <?php if ( $address = wpinv_get_business_address() ) { ?>
-        <div class="address"><?php echo wpautop( wp_kses_post( $address ) );?></div>
+        <div class="name"><?php echo esc_html($from_name); ?></div>
+        <?php if ($address = wpinv_get_business_address()) { ?>
+        <div class="address"><?php echo wpautop(wp_kses_post($address)); ?></div>
         <?php } ?>
-        <?php if ( $email_from = wpinv_mail_get_from_address() ) { ?>
-        <div class="email_from"><?php echo wp_sprintf( __( 'Email: %s', 'invoicing' ), $email_from );?></div>
+        <?php if ($email_from = wpinv_mail_get_from_address()) { ?>
+        <div class="email_from"><?php echo wp_sprintf(__('Email: %s', 'invoicing'), $email_from); ?></div>
         <?php } ?>
     </div>
     <?php
 }
 
-function wpinv_watermark( $id = 0 ) {
-    $output = wpinv_get_watermark( $id );
+function wpinv_watermark($id = 0) {
+    $output = wpinv_get_watermark($id);
     
-    return apply_filters( 'wpinv_get_watermark', $output, $id );
+    return apply_filters('wpinv_get_watermark', $output, $id);
 }
 
-function wpinv_get_watermark( $id ) {
-    if ( !$id > 0 ) {
+function wpinv_get_watermark($id) {
+    if (!$id > 0) {
         return NULL;
     }
-    $invoice = wpinv_get_invoice( $id );
+    $invoice = wpinv_get_invoice($id);
     
-    if ( !empty( $invoice ) && "wpi_invoice" === $invoice->post_type ) {
-        if ( $invoice->is_paid() ) {
-            return __( 'Paid', 'invoicing' );
+    if (!empty($invoice) && "wpi_invoice" === $invoice->post_type) {
+        if ($invoice->is_paid()) {
+            return __('Paid', 'invoicing');
         }
-        if ( $invoice->is_refunded() ) {
-            return __( 'Refunded', 'invoicing' );
+        if ($invoice->is_refunded()) {
+            return __('Refunded', 'invoicing');
         }
-        if ( $invoice->has_status( array( 'wpi-cancelled' ) ) ) {
-            return __( 'Cancelled', 'invoicing' );
+        if ($invoice->has_status(array('wpi-cancelled'))) {
+            return __('Cancelled', 'invoicing');
         }
     }
     
     return NULL;
 }
 
-function wpinv_display_invoice_details( $invoice ) {
+function wpinv_display_invoice_details($invoice) {
     global $wpinv_euvat;
     
     $invoice_id = $invoice->ID;
     $vat_name   = $wpinv_euvat->get_vat_name();
     $use_taxes  = wpinv_use_taxes();
     
-    $invoice_status = wpinv_get_invoice_status( $invoice_id );
+    $invoice_status = wpinv_get_invoice_status($invoice_id);
     ?>
     <table class="table table-bordered table-sm">
-        <?php if ( $invoice_number = wpinv_get_invoice_number( $invoice_id ) ) { ?>
+        <?php if ($invoice_number = wpinv_get_invoice_number($invoice_id)) { ?>
             <tr class="wpi-row-number">
-                <th><?php echo apply_filters( 'wpinv_invoice_number_label', __( 'Invoice Number', 'invoicing' ), $invoice ); ?></th>
-                <td><?php echo esc_html( $invoice_number ); ?></td>
+                <th><?php echo apply_filters('wpinv_invoice_number_label', __('Invoice Number', 'invoicing'), $invoice); ?></th>
+                <td><?php echo esc_html($invoice_number); ?></td>
             </tr>
         <?php } ?>
         <tr class="wpi-row-status">
-            <th><?php echo apply_filters( 'wpinv_invoice_status_label', __( 'Invoice Status', 'invoicing' ), $invoice ); ?></th>
-            <td><?php echo wpinv_invoice_status_label( $invoice_status, wpinv_get_invoice_status( $invoice_id, true ) ); ?></td>
+            <th><?php echo apply_filters('wpinv_invoice_status_label', __('Invoice Status', 'invoicing'), $invoice); ?></th>
+            <td><?php echo wpinv_invoice_status_label($invoice_status, wpinv_get_invoice_status($invoice_id, true)); ?></td>
         </tr>
-        <?php if ( $invoice->is_renewal() ) { ?>
+        <?php if ($invoice->is_renewal()) { ?>
         <tr class="wpi-row-parent">
-            <th><?php echo apply_filters( 'wpinv_invoice_parent_invoice_label', __( 'Parent Invoice', 'invoicing' ), $invoice ); ?></th>
-            <td><?php echo wpinv_invoice_link( $invoice->parent_invoice ); ?></td>
+            <th><?php echo apply_filters('wpinv_invoice_parent_invoice_label', __('Parent Invoice', 'invoicing'), $invoice); ?></th>
+            <td><?php echo wpinv_invoice_link($invoice->parent_invoice); ?></td>
         </tr>
         <?php } ?>
-        <?php if ( ( $gateway_name = wpinv_get_payment_gateway_name( $invoice_id ) ) && ( $invoice->is_paid() || $invoice->is_refunded() ) ) { ?>
+        <?php if (($gateway_name = wpinv_get_payment_gateway_name($invoice_id)) && ($invoice->is_paid() || $invoice->is_refunded())) { ?>
             <tr class="wpi-row-gateway">
-                <th><?php echo apply_filters( 'wpinv_invoice_payment_method_label', __( 'Payment Method', 'invoicing' ), $invoice ); ?></th>
+                <th><?php echo apply_filters('wpinv_invoice_payment_method_label', __('Payment Method', 'invoicing'), $invoice); ?></th>
                 <td><?php echo $gateway_name; ?></td>
             </tr>
         <?php } ?>
-        <?php if ( $invoice_date = wpinv_get_invoice_date( $invoice_id ) ) { ?>
+        <?php if ($invoice_date = wpinv_get_invoice_date($invoice_id)) { ?>
             <tr class="wpi-row-date">
-                <th><?php echo apply_filters( 'wpinv_invoice_date_label', __( 'Invoice Date', 'invoicing' ), $invoice ); ?></th>
+                <th><?php echo apply_filters('wpinv_invoice_date_label', __('Invoice Date', 'invoicing'), $invoice); ?></th>
                 <td><?php echo $invoice_date; ?></td>
             </tr>
         <?php } ?>
-        <?php do_action( 'wpinv_display_details_before_due_date', $invoice_id ); ?>
-        <?php if ( wpinv_get_option( 'overdue_active' ) && $invoice->needs_payment() && ( $due_date = $invoice->get_due_date( true ) ) ) { ?>
+        <?php do_action('wpinv_display_details_before_due_date', $invoice_id); ?>
+        <?php if (wpinv_get_option('overdue_active') && $invoice->needs_payment() && ($due_date = $invoice->get_due_date(true))) { ?>
             <tr class="wpi-row-date">
-                <th><?php echo apply_filters( 'wpinv_invoice_due_date_label', __( 'Due Date', 'invoicing' ), $invoice ); ?></th>
+                <th><?php echo apply_filters('wpinv_invoice_due_date_label', __('Due Date', 'invoicing'), $invoice); ?></th>
                 <td><?php echo $due_date; ?></td>
             </tr>
         <?php } ?>
-        <?php do_action( 'wpinv_display_details_after_due_date', $invoice_id ); ?>
-        <?php if ( $owner_vat_number = $wpinv_euvat->get_vat_number() ) { ?>
+        <?php do_action('wpinv_display_details_after_due_date', $invoice_id); ?>
+        <?php if ($owner_vat_number = $wpinv_euvat->get_vat_number()) { ?>
             <tr class="wpi-row-ovatno">
-                <th><?php echo apply_filters( 'wpinv_invoice_owner_vat_number_label', wp_sprintf( __( 'Owner %s Number', 'invoicing' ), $vat_name ), $invoice, $vat_name ); ?></th>
+                <th><?php echo apply_filters('wpinv_invoice_owner_vat_number_label', wp_sprintf(__('Owner %s Number', 'invoicing'), $vat_name), $invoice, $vat_name); ?></th>
                 <td><?php echo $owner_vat_number; ?></td>
             </tr>
         <?php } ?>
-        <?php if ( $use_taxes && ( $user_vat_number = wpinv_get_invoice_vat_number( $invoice_id ) ) ) { ?>
+        <?php if ($use_taxes && ($user_vat_number = wpinv_get_invoice_vat_number($invoice_id))) { ?>
             <tr class="wpi-row-uvatno">
-                <th><?php echo apply_filters( 'wpinv_invoice_user_vat_number_label', wp_sprintf( __( 'Invoice %s Number', 'invoicing' ), $vat_name ), $invoice, $vat_name ); ?></th>
+                <th><?php echo apply_filters('wpinv_invoice_user_vat_number_label', wp_sprintf(__('Invoice %s Number', 'invoicing'), $vat_name), $invoice, $vat_name); ?></th>
                 <td><?php echo $user_vat_number; ?></td>
             </tr>
         <?php } ?>
         <tr class="table-active tr-total wpi-row-total">
-            <th><strong><?php _e( 'Total Amount', 'invoicing' ) ?></strong></th>
-            <td><strong><?php echo wpinv_payment_total( $invoice_id, true ); ?></strong></td>
+            <th><strong><?php _e('Total Amount', 'invoicing') ?></strong></th>
+            <td><strong><?php echo wpinv_payment_total($invoice_id, true); ?></strong></td>
         </tr>
     </table>
 <?php
@@ -937,84 +937,84 @@ 
  * @param  string $separator How to separate address lines.
  * @return string
  */
-function wpinv_get_invoice_address_markup( $billing_details, $separator = '<br/>' ) {
+function wpinv_get_invoice_address_markup($billing_details, $separator = '<br/>') {
 
     // Retrieve the address markup...
-    $country= empty( $billing_details['country'] ) ? '' : $billing_details['country'];
-    $format = wpinv_get_full_address_format( $country );
+    $country = empty($billing_details['country']) ? '' : $billing_details['country'];
+    $format = wpinv_get_full_address_format($country);
 
     // ... and the replacements.
-    $replacements = wpinv_get_invoice_address_replacements( $billing_details );
+    $replacements = wpinv_get_invoice_address_replacements($billing_details);
 
-    $formatted_address = str_ireplace( array_keys( $replacements ), $replacements, $format );
+    $formatted_address = str_ireplace(array_keys($replacements), $replacements, $format);
     
 	// Remove unavailable tags.
-    $formatted_address = preg_replace( "/\{\{\w+\}\}/", '', $formatted_address );
+    $formatted_address = preg_replace("/\{\{\w+\}\}/", '', $formatted_address);
 
     // Clean up white space.
-	$formatted_address = preg_replace( '/  +/', ' ', trim( $formatted_address ) );
-    $formatted_address = preg_replace( '/\n\n+/', "\n", $formatted_address );
+	$formatted_address = preg_replace('/  +/', ' ', trim($formatted_address));
+    $formatted_address = preg_replace('/\n\n+/', "\n", $formatted_address);
     
     // Break newlines apart and remove empty lines/trim commas and white space.
-	$formatted_address = array_filter( array_map( 'wpinv_trim_formatted_address_line', explode( "\n", $formatted_address ) ) );
+	$formatted_address = array_filter(array_map('wpinv_trim_formatted_address_line', explode("\n", $formatted_address)));
 
     // Add html breaks.
-	$formatted_address = implode( $separator, $formatted_address );
+	$formatted_address = implode($separator, $formatted_address);
 
 	// We're done!
 	return $formatted_address;
     
 }
 
-function wpinv_display_to_address( $invoice_id = 0 ) {
-    $invoice = wpinv_get_invoice( $invoice_id );
+function wpinv_display_to_address($invoice_id = 0) {
+    $invoice = wpinv_get_invoice($invoice_id);
     
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
         return NULL;
     }
     
     $billing_details = $invoice->get_user_info();
-    $output = '<div class="to col-xs-2"><strong>' . __( 'To:', 'invoicing' ) . '</strong></div>';
+    $output = '<div class="to col-xs-2"><strong>' . __('To:', 'invoicing') . '</strong></div>';
     $output .= '<div class="wrapper col-xs-10">';
     
     ob_start();
-    do_action( 'wpinv_display_to_address_top', $invoice );
+    do_action('wpinv_display_to_address_top', $invoice);
     $output .= ob_get_clean();
     
-    $address_row = wpinv_get_invoice_address_markup( $billing_details );
+    $address_row = wpinv_get_invoice_address_markup($billing_details);
 
-    if ( $address_row ) {
+    if ($address_row) {
         $output .= '<div class="address">' . $address_row . '</div>';
     }
 
-    if ( $phone = $invoice->get_phone() ) {
-        $output .= '<div class="phone">' . wp_sprintf( __( 'Phone: %s', 'invoicing' ), esc_html( $phone ) ) . '</div>';
+    if ($phone = $invoice->get_phone()) {
+        $output .= '<div class="phone">' . wp_sprintf(__('Phone: %s', 'invoicing'), esc_html($phone)) . '</div>';
     }
-    if ( $email = $invoice->get_email() ) {
-        $output .= '<div class="email">' . wp_sprintf( __( 'Email: %s' , 'invoicing'), esc_html( $email ) ) . '</div>';
+    if ($email = $invoice->get_email()) {
+        $output .= '<div class="email">' . wp_sprintf(__('Email: %s', 'invoicing'), esc_html($email)) . '</div>';
     }
 
     ob_start();
-    do_action( 'wpinv_display_to_address_bottom', $invoice );
+    do_action('wpinv_display_to_address_bottom', $invoice);
     $output .= ob_get_clean();
     
     $output .= '</div>';
-    $output = apply_filters( 'wpinv_display_to_address', $output, $invoice );
+    $output = apply_filters('wpinv_display_to_address', $output, $invoice);
 
     echo $output;
 }
 
-function wpinv_display_line_items( $invoice_id = 0 ) {
+function wpinv_display_line_items($invoice_id = 0) {
     global $wpinv_euvat, $ajax_cart_details;
-    $invoice            = wpinv_get_invoice( $invoice_id );
+    $invoice            = wpinv_get_invoice($invoice_id);
     $quantities_enabled = wpinv_item_quantities_enabled();
     $use_taxes          = wpinv_use_taxes();
-    if ( !$use_taxes && (float)$invoice->get_tax() > 0 ) {
+    if (!$use_taxes && (float) $invoice->get_tax() > 0) {
         $use_taxes = true;
     }
-    $zero_tax           = !(float)$invoice->get_tax() > 0 ? true : false;
-    $tax_label           = $use_taxes && $invoice->has_vat() ? $wpinv_euvat->get_vat_name() : __( 'Tax', 'invoicing' );
-    $tax_title          = !$zero_tax && $use_taxes ? ( wpinv_prices_include_tax() ? wp_sprintf( __( '(%s Incl.)', 'invoicing' ), $tax_label ) : wp_sprintf( __( '(%s Excl.)', 'invoicing' ), $tax_label ) ) : '';
+    $zero_tax           = !(float) $invoice->get_tax() > 0 ? true : false;
+    $tax_label = $use_taxes && $invoice->has_vat() ? $wpinv_euvat->get_vat_name() : __('Tax', 'invoicing');
+    $tax_title          = !$zero_tax && $use_taxes ? (wpinv_prices_include_tax() ? wp_sprintf(__('(%s Incl.)', 'invoicing'), $tax_label) : wp_sprintf(__('(%s Excl.)', 'invoicing'), $tax_label)) : '';
 
     $cart_details       = $invoice->get_cart_details();
     $ajax_cart_details  = $cart_details;
@@ -1023,67 +1023,67 @@ 
     <table class="table table-sm table-bordered">
         <thead>
             <tr>
-                <th class="name"><strong><?php _e( "Item Name", "invoicing" );?></strong></th>
-                <th class="rate"><strong><?php _e( "Price", "invoicing" );?></strong></th>
+                <th class="name"><strong><?php _e("Item Name", "invoicing"); ?></strong></th>
+                <th class="rate"><strong><?php _e("Price", "invoicing"); ?></strong></th>
                 <?php if ($quantities_enabled) { ?>
-                    <th class="qty"><strong><?php _e( "Qty", "invoicing" );?></strong></th>
+                    <th class="qty"><strong><?php _e("Qty", "invoicing"); ?></strong></th>
                 <?php } ?>
                 <?php if ($use_taxes && !$zero_tax) { ?>
                     <th class="tax"><strong><?php echo $tax_label . ' <span class="normal small">(%)</span>'; ?></strong></th>
                 <?php } ?>
-                <th class="total"><strong><?php echo __( "Item Total", "invoicing" ) . ' <span class="normal small">' . $tax_title . '<span>';?></strong></th>
+                <th class="total"><strong><?php echo __("Item Total", "invoicing") . ' <span class="normal small">' . $tax_title . '<span>'; ?></strong></th>
             </tr>
         </thead>
         <tbody>
         <?php 
-            if ( !empty( $cart_details ) ) {
-                do_action( 'wpinv_display_line_items_start', $invoice );
+            if (!empty($cart_details)) {
+                do_action('wpinv_display_line_items_start', $invoice);
 
                 $count = 0;
                 $cols  = 3;
-                foreach ( $cart_details as $key => $cart_item ) {
-                    $item_id    = !empty($cart_item['id']) ? absint( $cart_item['id'] ) : '';
-                    $item_price = isset($cart_item["item_price"]) ? wpinv_round_amount( $cart_item["item_price"] ) : 0;
-                    $line_total = isset($cart_item["subtotal"]) ? wpinv_round_amount( $cart_item["subtotal"] ) : 0;
-                    $quantity   = !empty($cart_item['quantity']) && (int)$cart_item['quantity'] > 0 ? absint( $cart_item['quantity'] ) : 1;
+                foreach ($cart_details as $key => $cart_item) {
+                    $item_id    = !empty($cart_item['id']) ? absint($cart_item['id']) : '';
+                    $item_price = isset($cart_item["item_price"]) ? wpinv_round_amount($cart_item["item_price"]) : 0;
+                    $line_total = isset($cart_item["subtotal"]) ? wpinv_round_amount($cart_item["subtotal"]) : 0;
+                    $quantity   = !empty($cart_item['quantity']) && (int) $cart_item['quantity'] > 0 ? absint($cart_item['quantity']) : 1;
 
-                    $item       = $item_id ? new WPInv_Item( $item_id ) : NULL;
+                    $item       = $item_id ? new WPInv_Item($item_id) : NULL;
                     $summary    = '';
-	                $item_name    = '';
+	                $item_name = '';
                     $cols       = 3;
-                    if ( !empty($item) ) {
+                    if (!empty($item)) {
                         $item_name  = $item->get_name();
                         $summary    = $item->get_summary();
                     }
-                    $item_name  = !empty($cart_item['name']) ? $cart_item['name'] : $item_name;
+                    $item_name = !empty($cart_item['name']) ? $cart_item['name'] : $item_name;
 
-                    $summary = apply_filters( 'wpinv_print_invoice_line_item_summary', $summary, $cart_item, $item, $invoice );
+                    $summary = apply_filters('wpinv_print_invoice_line_item_summary', $summary, $cart_item, $item, $invoice);
 
                     $item_tax       = '';
                     $tax_rate       = '';
-                    if ( $use_taxes && $cart_item['tax'] > 0 && $cart_item['subtotal'] > 0 ) {
-                        $item_tax = wpinv_price( wpinv_format_amount( $cart_item['tax'] ), $invoice->get_currency() );
-                        $tax_rate = !empty( $cart_item['vat_rate'] ) ? $cart_item['vat_rate'] : ( $cart_item['tax'] / $cart_item['subtotal'] ) * 100;
-                        $tax_rate = $tax_rate > 0 ? (float)wpinv_round_amount( $tax_rate, 4 ) : '';
+                    if ($use_taxes && $cart_item['tax'] > 0 && $cart_item['subtotal'] > 0) {
+                        $item_tax = wpinv_price(wpinv_format_amount($cart_item['tax']), $invoice->get_currency());
+                        $tax_rate = !empty($cart_item['vat_rate']) ? $cart_item['vat_rate'] : ($cart_item['tax'] / $cart_item['subtotal']) * 100;
+                        $tax_rate = $tax_rate > 0 ? (float) wpinv_round_amount($tax_rate, 4) : '';
                         $tax_rate = $tax_rate != '' ? ' <small class="tax-rate">(' . $tax_rate . '%)</small>' : '';
                     }
 
                     $line_item_tax = $item_tax . $tax_rate;
 
-                    if ( $line_item_tax === '' ) {
+                    if ($line_item_tax === '') {
                         $line_item_tax = 0; // Zero tax
                     }
 
-                    $action = apply_filters( 'wpinv_display_line_item_action', '', $cart_item, $invoice, $cols );
+                    $action = apply_filters('wpinv_display_line_item_action', '', $cart_item, $invoice, $cols);
 
-                    $line_item = '<tr class="row-' . ( ($count % 2 == 0) ? 'even' : 'odd' ) . ' wpinv-item">';
-                        $line_item .= '<td class="name">' . $action. esc_html__( $item_name, 'invoicing' ) . wpinv_get_item_suffix( $item );
-                        if ( $summary !== '' ) {
-                            $line_item .= '<br/><small class="meta">' . wpautop( wp_kses_post( $summary ) ) . '</small>';
+                    $line_item = '<tr class="row-' . (($count % 2 == 0) ? 'even' : 'odd') . ' wpinv-item">';
+                        $line_item .= '<td class="name">' . $action . esc_html__($item_name, 'invoicing') . wpinv_get_item_suffix($item);
+                        if ($summary !== '') {
+                            $line_item .= '<br/><small class="meta">' . wpautop(wp_kses_post($summary)) . '</small>';
                         }
                         $line_item .= '</td>';
 
-                        $line_item .= '<td class="rate">' . esc_html__( wpinv_price( wpinv_format_amount( $item_price ), $invoice->get_currency() ) ) . '</td>';
+                        $line_item .= '<td class="rate">' . esc_html__(wpinv_price(wpinv_format_amount($item_price), $invoice->get_currency())) . '</td>';
                         if ($quantities_enabled) {
                             $cols++;
                             $line_item .= '<td class="qty">' . $quantity . '</td>';
@@ -1092,55 +1092,55 @@ 
                             $cols++;
                             $line_item .= '<td class="tax">' . $line_item_tax . '</td>';
                         }
-                        $line_item .= '<td class="total">' . esc_html__( wpinv_price( wpinv_format_amount( $line_total ), $invoice->get_currency() ) ) . '</td>';
+                        $line_item .= '<td class="total">' . esc_html__(wpinv_price(wpinv_format_amount($line_total), $invoice->get_currency())) . '</td>';
                     $line_item .= '</tr>';
 
-                    echo apply_filters( 'wpinv_display_line_item', $line_item, $cart_item, $invoice, $cols );
+                    echo apply_filters('wpinv_display_line_item', $line_item, $cart_item, $invoice, $cols);
 
                     $count++;
                 }
 
-                do_action( 'wpinv_display_before_subtotal', $invoice, $cols );
+                do_action('wpinv_display_before_subtotal', $invoice, $cols);
                 ?>
                 <tr class="row-sub-total row_odd">
-                    <td class="rate" colspan="<?php echo ( $cols - 1 ); ?>"><?php echo apply_filters( 'wpinv_print_cart_subtotal_label', '<strong>' . __( 'Sub Total', 'invoicing' ) . ':</strong>', $invoice ); ?></td>
-                    <td class="total"><strong><?php _e( wpinv_subtotal( $invoice_id, true ) ) ?></strong></td>
+                    <td class="rate" colspan="<?php echo ($cols - 1); ?>"><?php echo apply_filters('wpinv_print_cart_subtotal_label', '<strong>' . __('Sub Total', 'invoicing') . ':</strong>', $invoice); ?></td>
+                    <td class="total"><strong><?php _e(wpinv_subtotal($invoice_id, true)) ?></strong></td>
                 </tr>
                 <?php
-                do_action( 'wpinv_display_after_subtotal', $invoice, $cols );
+                do_action('wpinv_display_after_subtotal', $invoice, $cols);
                 
-                if ( wpinv_discount( $invoice_id, false ) > 0 ) {
-                    do_action( 'wpinv_display_before_discount', $invoice, $cols );
+                if (wpinv_discount($invoice_id, false) > 0) {
+                    do_action('wpinv_display_before_discount', $invoice, $cols);
                     ?>
                         <tr class="row-discount">
-                            <td class="rate" colspan="<?php echo ( $cols - 1 ); ?>"><?php wpinv_get_discount_label( wpinv_discount_code( $invoice_id ) ); ?>:</td>
-                            <td class="total"><?php echo wpinv_discount( $invoice_id, true, true ); ?></td>
+                            <td class="rate" colspan="<?php echo ($cols - 1); ?>"><?php wpinv_get_discount_label(wpinv_discount_code($invoice_id)); ?>:</td>
+                            <td class="total"><?php echo wpinv_discount($invoice_id, true, true); ?></td>
                         </tr>
                     <?php
-                    do_action( 'wpinv_display_after_discount', $invoice, $cols );
+                    do_action('wpinv_display_after_discount', $invoice, $cols);
                 }
 
-                if ( $use_taxes ) {
-                    do_action( 'wpinv_display_before_tax', $invoice, $cols );
+                if ($use_taxes) {
+                    do_action('wpinv_display_before_tax', $invoice, $cols);
                     ?>
                     <tr class="row-tax">
-                        <td class="rate" colspan="<?php echo ( $cols - 1 ); ?>"><?php echo apply_filters( 'wpinv_print_cart_tax_label', '<strong>' . $tax_label . ':</strong>', $invoice ); ?></td>
-                        <td class="total"><?php _e( wpinv_tax( $invoice_id, true ) ) ?></td>
+                        <td class="rate" colspan="<?php echo ($cols - 1); ?>"><?php echo apply_filters('wpinv_print_cart_tax_label', '<strong>' . $tax_label . ':</strong>', $invoice); ?></td>
+                        <td class="total"><?php _e(wpinv_tax($invoice_id, true)) ?></td>
                     </tr>
                     <?php
-                    do_action( 'wpinv_display_after_tax', $invoice, $cols );
+                    do_action('wpinv_display_after_tax', $invoice, $cols);
                 }
 
-                do_action( 'wpinv_display_before_total', $invoice, $cols );
+                do_action('wpinv_display_before_total', $invoice, $cols);
                 ?>
                 <tr class="table-active row-total">
-                    <td class="rate" colspan="<?php echo ( $cols - 1 ); ?>"><?php echo apply_filters( 'wpinv_print_cart_total_label', '<strong>' . __( 'Total', 'invoicing' ) . ':</strong>', $invoice ); ?></td>
-                    <td class="total"><strong><?php _e( wpinv_payment_total( $invoice_id, true ) ) ?></strong></td>
+                    <td class="rate" colspan="<?php echo ($cols - 1); ?>"><?php echo apply_filters('wpinv_print_cart_total_label', '<strong>' . __('Total', 'invoicing') . ':</strong>', $invoice); ?></td>
+                    <td class="total"><strong><?php _e(wpinv_payment_total($invoice_id, true)) ?></strong></td>
                 </tr>
                 <?php
-                do_action( 'wpinv_display_after_total', $invoice, $cols );
+                do_action('wpinv_display_after_total', $invoice, $cols);
 
-                do_action( 'wpinv_display_line_end', $invoice, $cols );
+                do_action('wpinv_display_line_end', $invoice, $cols);
             }
         ?>
         </tbody>
@@ -1152,56 +1152,56 @@ 
 /**
  * @param WPInv_Invoice $invoice
  */
-function wpinv_display_invoice_notes( $invoice ) {
+function wpinv_display_invoice_notes($invoice) {
 
-    $notes = wpinv_get_invoice_notes( $invoice->ID, 'customer' );
+    $notes = wpinv_get_invoice_notes($invoice->ID, 'customer');
 
-    if ( empty( $notes ) ) {
+    if (empty($notes)) {
         return;
     }
 
     echo '<div class="wpi_invoice_notes_container">';
-    echo '<h2>' . __( 'Invoice Notes', 'invoicing' ) .'</h2>';
+    echo '<h2>' . __('Invoice Notes', 'invoicing') . '</h2>';
     echo '<ul class="wpi_invoice_notes">';
 
-    foreach( $notes as $note ) {
-        wpinv_get_invoice_note_line_item( $note );
+    foreach ($notes as $note) {
+        wpinv_get_invoice_note_line_item($note);
     }
 
     echo '</ul>';
     echo '</div>';
 }
-add_action( 'wpinv_invoice_print_after_line_items', 'wpinv_display_invoice_notes' );
+add_action('wpinv_invoice_print_after_line_items', 'wpinv_display_invoice_notes');
 
-function wpinv_display_invoice_totals( $invoice_id = 0 ) {
+function wpinv_display_invoice_totals($invoice_id = 0) {
     $use_taxes = wpinv_use_taxes();
 
-    do_action( 'wpinv_before_display_totals_table', $invoice_id ); 
+    do_action('wpinv_before_display_totals_table', $invoice_id); 
     ?>
     <table class="table table-sm table-bordered table-responsive">
         <tbody>
-            <?php do_action( 'wpinv_before_display_totals' ); ?>
+            <?php do_action('wpinv_before_display_totals'); ?>
             <tr class="row-sub-total">
-                <td class="rate"><strong><?php _e( 'Sub Total', 'invoicing' ); ?></strong></td>
-                <td class="total"><strong><?php _e( wpinv_subtotal( $invoice_id, true ) ) ?></strong></td>
+                <td class="rate"><strong><?php _e('Sub Total', 'invoicing'); ?></strong></td>
+                <td class="total"><strong><?php _e(wpinv_subtotal($invoice_id, true)) ?></strong></td>
             </tr>
-            <?php do_action( 'wpinv_after_display_totals' ); ?>
-            <?php if ( wpinv_discount( $invoice_id, false ) > 0 ) { ?>
+            <?php do_action('wpinv_after_display_totals'); ?>
+            <?php if (wpinv_discount($invoice_id, false) > 0) { ?>
                 <tr class="row-discount">
-                    <td class="rate"><?php wpinv_get_discount_label( wpinv_discount_code( $invoice_id ) ); ?></td>
-                    <td class="total"><?php echo wpinv_discount( $invoice_id, true, true ); ?></td>
+                    <td class="rate"><?php wpinv_get_discount_label(wpinv_discount_code($invoice_id)); ?></td>
+                    <td class="total"><?php echo wpinv_discount($invoice_id, true, true); ?></td>
                 </tr>
-            <?php do_action( 'wpinv_after_display_discount' ); ?>
+            <?php do_action('wpinv_after_display_discount'); ?>
             <?php } ?>
-            <?php if ( $use_taxes ) { ?>
+            <?php if ($use_taxes) { ?>
             <tr class="row-tax">
-                <td class="rate"><?php _e( 'Tax', 'invoicing' ); ?></td>
-                <td class="total"><?php _e( wpinv_tax( $invoice_id, true ) ) ?></td>
+                <td class="rate"><?php _e('Tax', 'invoicing'); ?></td>
+                <td class="total"><?php _e(wpinv_tax($invoice_id, true)) ?></td>
             </tr>
-            <?php do_action( 'wpinv_after_display_tax' ); ?>
+            <?php do_action('wpinv_after_display_tax'); ?>
             <?php } ?>
-            <?php if ( $fees = wpinv_get_fees( $invoice_id ) ) { ?>
-                <?php foreach ( $fees as $fee ) { ?>
+            <?php if ($fees = wpinv_get_fees($invoice_id)) { ?>
+                <?php foreach ($fees as $fee) { ?>
                     <tr class="row-fee">
                         <td class="rate"><?php echo $fee['label']; ?></td>
                         <td class="total"><?php echo $fee['amount_display']; ?></td>
@@ -1209,82 +1209,82 @@ 
                 <?php } ?>
             <?php } ?>
             <tr class="table-active row-total">
-                <td class="rate"><strong><?php _e( 'Total', 'invoicing' ) ?></strong></td>
-                <td class="total"><strong><?php _e( wpinv_payment_total( $invoice_id, true ) ) ?></strong></td>
+                <td class="rate"><strong><?php _e('Total', 'invoicing') ?></strong></td>
+                <td class="total"><strong><?php _e(wpinv_payment_total($invoice_id, true)) ?></strong></td>
             </tr>
-            <?php do_action( 'wpinv_after_totals' ); ?>
+            <?php do_action('wpinv_after_totals'); ?>
         </tbody>
 
     </table>
 
-    <?php do_action( 'wpinv_after_totals_table' );
+    <?php do_action('wpinv_after_totals_table');
 }
 
-function wpinv_display_payments_info( $invoice_id = 0, $echo = true ) {
-    $invoice = wpinv_get_invoice( $invoice_id );
+function wpinv_display_payments_info($invoice_id = 0, $echo = true) {
+    $invoice = wpinv_get_invoice($invoice_id);
 
     ob_start();
-    do_action( 'wpinv_before_display_payments_info', $invoice_id );
-    if ( ( $gateway_title = $invoice->get_gateway_title() ) || $invoice->is_paid() || $invoice->is_refunded() ) {
+    do_action('wpinv_before_display_payments_info', $invoice_id);
+    if (($gateway_title = $invoice->get_gateway_title()) || $invoice->is_paid() || $invoice->is_refunded()) {
         ?>
         <div class="wpi-payment-info">
-            <p class="wpi-payment-gateway"><?php echo wp_sprintf( __( 'Payment via %s', 'invoicing' ), $gateway_title ? $gateway_title : __( 'Manually', 'invoicing' ) ); ?></p>
-            <?php if ( $gateway_title ) { ?>
-            <p class="wpi-payment-transid"><?php echo wp_sprintf( __( 'Transaction ID: %s', 'invoicing' ), $invoice->get_transaction_id() ); ?></p>
+            <p class="wpi-payment-gateway"><?php echo wp_sprintf(__('Payment via %s', 'invoicing'), $gateway_title ? $gateway_title : __('Manually', 'invoicing')); ?></p>
+            <?php if ($gateway_title) { ?>
+            <p class="wpi-payment-transid"><?php echo wp_sprintf(__('Transaction ID: %s', 'invoicing'), $invoice->get_transaction_id()); ?></p>
             <?php } ?>
         </div>
         <?php
     }
-    do_action( 'wpinv_after_display_payments_info', $invoice_id );
+    do_action('wpinv_after_display_payments_info', $invoice_id);
     $outout = ob_get_clean();
 
-    if ( $echo ) {
+    if ($echo) {
         echo $outout;
     } else {
         return $outout;
     }
 }
 
-function wpinv_display_style( $invoice ) {
-    wp_register_style( 'wpinv-single-style', WPINV_PLUGIN_URL . 'assets/css/invoice.css', array(), WPINV_VERSION );
+function wpinv_display_style($invoice) {
+    wp_register_style('wpinv-single-style', WPINV_PLUGIN_URL . 'assets/css/invoice.css', array(), WPINV_VERSION);
 
-    wp_print_styles( 'open-sans' );
-    wp_print_styles( 'wpinv-single-style' );
+    wp_print_styles('open-sans');
+    wp_print_styles('wpinv-single-style');
 
     $custom_css = wpinv_get_option('template_custom_css');
-    if(isset($custom_css) && !empty($custom_css)){
-        $custom_css     = wp_kses( $custom_css, array( '\'', '\"' ) );
-        $custom_css     = str_replace( '&gt;', '>', $custom_css );
+    if (isset($custom_css) && !empty($custom_css)) {
+        $custom_css     = wp_kses($custom_css, array('\'', '\"'));
+        $custom_css     = str_replace('&gt;', '>', $custom_css);
         echo '<style type="text/css">';
         echo $custom_css;
         echo '</style>';
     }
 }
-add_action( 'wpinv_invoice_print_head', 'wpinv_display_style' );
-add_action( 'wpinv_invalid_invoice_head', 'wpinv_display_style' );
+add_action('wpinv_invoice_print_head', 'wpinv_display_style');
+add_action('wpinv_invalid_invoice_head', 'wpinv_display_style');
 
 function wpinv_checkout_billing_details() {
-    $invoice_id = (int)wpinv_get_invoice_cart_id();
+    $invoice_id = (int) wpinv_get_invoice_cart_id();
     if (empty($invoice_id)) {
-        wpinv_error_log( 'Invoice id not found', 'ERROR', __FILE__, __LINE__ );
+        wpinv_error_log('Invoice id not found', 'ERROR', __FILE__, __LINE__);
         return null;
     }
 
-    $invoice = wpinv_get_invoice_cart( $invoice_id );
+    $invoice = wpinv_get_invoice_cart($invoice_id);
     if (empty($invoice)) {
-        wpinv_error_log( 'Invoice not found', 'ERROR', __FILE__, __LINE__ );
+        wpinv_error_log('Invoice not found', 'ERROR', __FILE__, __LINE__);
         return null;
     }
     $user_id        = $invoice->get_user_id();
     $user_info      = $invoice->get_user_info();
-    $address_info   = wpinv_get_user_address( $user_id );
+    $address_info   = wpinv_get_user_address($user_id);
 
-    if ( empty( $user_info['first_name'] ) && !empty( $user_info['first_name'] ) ) {
+    if (empty($user_info['first_name']) && !empty($user_info['first_name'])) {
         $user_info['first_name'] = $user_info['first_name'];
         $user_info['last_name'] = $user_info['last_name'];
     }
 
-    if ( ( ( empty( $user_info['country'] ) && !empty( $address_info['country'] ) ) || ( empty( $user_info['state'] ) && !empty( $address_info['state'] ) && $user_info['country'] == $address_info['country'] ) ) ) {
+    if (((empty($user_info['country']) && !empty($address_info['country'])) || (empty($user_info['state']) && !empty($address_info['state']) && $user_info['country'] == $address_info['country']))) {
         $user_info['country']   = $address_info['country'];
         $user_info['state']     = $address_info['state'];
         $user_info['city']      = $address_info['city'];
@@ -1300,99 +1300,99 @@ 
         'address'
     );
 
-    foreach ( $address_fields as $field ) {
-        if ( empty( $user_info[$field] ) ) {
+    foreach ($address_fields as $field) {
+        if (empty($user_info[$field])) {
             $user_info[$field] = $address_info[$field];
         }
     }
 
-    return apply_filters( 'wpinv_checkout_billing_details', $user_info, $invoice );
+    return apply_filters('wpinv_checkout_billing_details', $user_info, $invoice);
 }
 
 function wpinv_admin_get_line_items($invoice = array()) {
     $item_quantities    = wpinv_item_quantities_enabled();
     $use_taxes          = wpinv_use_taxes();
 
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
         return NULL;
     }
 
     $cart_items = $invoice->get_cart_details();
-    if ( empty( $cart_items ) ) {
+    if (empty($cart_items)) {
         return NULL;
     }
 
     ob_start();
 
-    do_action( 'wpinv_admin_before_line_items', $cart_items, $invoice );
+    do_action('wpinv_admin_before_line_items', $cart_items, $invoice);
 
     $count = 0;
-    foreach ( $cart_items as $key => $cart_item ) {
+    foreach ($cart_items as $key => $cart_item) {
         $item_id    = $cart_item['id'];
-        $wpi_item   = $item_id > 0 ? new WPInv_Item( $item_id ) : NULL;
+        $wpi_item   = $item_id > 0 ? new WPInv_Item($item_id) : NULL;
 
         if (empty($wpi_item)) {
             continue;
         }
 
-        $item_price     = wpinv_price( wpinv_format_amount( $cart_item['item_price'] ), $invoice->get_currency() );
-        $quantity       = !empty( $cart_item['quantity'] ) && $cart_item['quantity'] > 0 ? $cart_item['quantity'] : 1;
-        $item_subtotal  = wpinv_price( wpinv_format_amount( $cart_item['subtotal'] ), $invoice->get_currency() );
+        $item_price     = wpinv_price(wpinv_format_amount($cart_item['item_price']), $invoice->get_currency());
+        $quantity       = !empty($cart_item['quantity']) && $cart_item['quantity'] > 0 ? $cart_item['quantity'] : 1;
+        $item_subtotal  = wpinv_price(wpinv_format_amount($cart_item['subtotal']), $invoice->get_currency());
         $can_remove     = true;
 
-        $summary = apply_filters( 'wpinv_admin_invoice_line_item_summary', '', $cart_item, $wpi_item, $invoice );
+        $summary = apply_filters('wpinv_admin_invoice_line_item_summary', '', $cart_item, $wpi_item, $invoice);
 
         $item_tax       = '';
         $tax_rate       = '';
-        if ( $invoice->is_taxable() && $cart_item['tax'] > 0 && $cart_item['subtotal'] > 0 ) {
-            $item_tax = wpinv_price( wpinv_format_amount( $cart_item['tax'] ), $invoice->get_currency() );
-            $tax_rate = !empty( $cart_item['vat_rate'] ) ? $cart_item['vat_rate'] : ( $cart_item['tax'] / $cart_item['subtotal'] ) * 100;
-            $tax_rate = $tax_rate > 0 ? (float)wpinv_round_amount( $tax_rate, 4 ) : '';
+        if ($invoice->is_taxable() && $cart_item['tax'] > 0 && $cart_item['subtotal'] > 0) {
+            $item_tax = wpinv_price(wpinv_format_amount($cart_item['tax']), $invoice->get_currency());
+            $tax_rate = !empty($cart_item['vat_rate']) ? $cart_item['vat_rate'] : ($cart_item['tax'] / $cart_item['subtotal']) * 100;
+            $tax_rate = $tax_rate > 0 ? (float) wpinv_round_amount($tax_rate, 4) : '';
             $tax_rate = $tax_rate != '' ? ' <span class="tax-rate">(' . $tax_rate . '%)</span>' : '';
         }
         $line_item_tax = $item_tax . $tax_rate;
 
-        if ( $line_item_tax === '' ) {
+        if ($line_item_tax === '') {
             $line_item_tax = 0; // Zero tax
         }
 
-        $line_item = '<tr class="item item-' . ( ($count % 2 == 0) ? 'even' : 'odd' ) . '" data-item-id="' . $item_id . '">';
+        $line_item = '<tr class="item item-' . (($count % 2 == 0) ? 'even' : 'odd') . '" data-item-id="' . $item_id . '">';
             $line_item .= '<td class="id">' . $item_id . '</td>';
-            $line_item .= '<td class="title"><a href="' . get_edit_post_link( $item_id ) . '" target="_blank">' . $cart_item['name'] . '</a>' . wpinv_get_item_suffix( $wpi_item );
-            if ( $summary !== '' ) {
-                $line_item .= '<span class="meta">' . wpautop( wp_kses_post( $summary ) ) . '</span>';
+            $line_item .= '<td class="title"><a href="' . get_edit_post_link($item_id) . '" target="_blank">' . $cart_item['name'] . '</a>' . wpinv_get_item_suffix($wpi_item);
+            if ($summary !== '') {
+                $line_item .= '<span class="meta">' . wpautop(wp_kses_post($summary)) . '</span>';
             }
             $line_item .= '</td>';
             $line_item .= '<td class="price">' . $item_price . '</td>';
             
-            if ( $item_quantities ) {
-                if ( count( $cart_items ) == 1 && $quantity <= 1 ) {
+            if ($item_quantities) {
+                if (count($cart_items) == 1 && $quantity <= 1) {
                     $can_remove = false;
                 }
                 $line_item .= '<td class="qty" data-quantity="' . $quantity . '">&nbsp;&times;&nbsp;' . $quantity . '</td>';
             } else {
-                if ( count( $cart_items ) == 1 ) {
+                if (count($cart_items) == 1) {
                     $can_remove = false;
                 }
             }
             $line_item .= '<td class="total">' . $item_subtotal . '</td>';
             
-            if ( $use_taxes ) {
+            if ($use_taxes) {
                 $line_item .= '<td class="tax">' . $line_item_tax . '</td>';
             }
             $line_item .= '<td class="action">';
-            if ( !$invoice->is_paid() && !$invoice->is_refunded() ) {
+            if (!$invoice->is_paid() && !$invoice->is_refunded()) {
                 $line_item .= '<i class="fa fa-remove wpinv-item-remove"></i>';
             }
             $line_item .= '</td>';
         $line_item .= '</tr>';
 
-        echo apply_filters( 'wpinv_admin_line_item', $line_item, $cart_item, $invoice );
+        echo apply_filters('wpinv_admin_line_item', $line_item, $cart_item, $invoice);
 
         $count++;
     } 
 
-    do_action( 'wpinv_admin_after_line_items', $cart_items, $invoice );
+    do_action('wpinv_admin_after_line_items', $cart_items, $invoice);
 
     return ob_get_clean();
 }
@@ -1402,70 +1402,70 @@ 
 
     // Set current invoice id.
     $wpi_checkout_id = wpinv_get_invoice_cart_id();
-    $form_action     = esc_url( wpinv_get_checkout_uri() );
+    $form_action     = esc_url(wpinv_get_checkout_uri());
     $payment_form    = wpinv_get_default_payment_form();
 
     ob_start();
-	    do_action( 'wpinv_checkout_content_before' );
+	    do_action('wpinv_checkout_content_before');
 
-        if ( wpinv_get_cart_contents() ) {
+        if (wpinv_get_cart_contents()) {
 
             // Get the form elements and items.
-	        $elements = $invoicing->form_elements->get_form_elements( $payment_form );
-	        $items    = $invoicing->form_elements->convert_checkout_items( wpinv_get_cart_contents(), wpinv_get_invoice_cart() );
+	        $elements = $invoicing->form_elements->get_form_elements($payment_form);
+	        $items    = $invoicing->form_elements->convert_checkout_items(wpinv_get_cart_contents(), wpinv_get_invoice_cart());
             ?>
             <form class="wpinv_payment_form" action="<?php echo $form_action; ?>" method="POST">
-                <?php do_action( 'wpinv_main_checkout_form_top' ); ?>
-                <input type='hidden' name='form_id' value='<?php echo esc_attr( $payment_form ); ?>'/>
-                <input type='hidden' name='invoice_id' value='<?php echo esc_attr( $wpi_checkout_id ); ?>'/>
+                <?php do_action('wpinv_main_checkout_form_top'); ?>
+                <input type='hidden' name='form_id' value='<?php echo esc_attr($payment_form); ?>'/>
+                <input type='hidden' name='invoice_id' value='<?php echo esc_attr($wpi_checkout_id); ?>'/>
                     <?php
-                        wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-                        wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+                        wp_nonce_field('wpinv_payment_form', 'wpinv_payment_form');
+                        wp_nonce_field('vat_validation', '_wpi_nonce');
 
-                        foreach ( $elements as $element ) {
-                            do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $payment_form );
-                            do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $payment_form );
+                        foreach ($elements as $element) {
+                            do_action('wpinv_frontend_render_payment_form_element', $element, $items, $payment_form);
+                            do_action("wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $payment_form);
                         }
                     ?>
                 <div class='wpinv_payment_form_errors alert alert-danger d-none'></div>
-                <?php do_action( 'wpinv_main_checkout_form_bottom' ); ?>
+                <?php do_action('wpinv_main_checkout_form_bottom'); ?>
             </form>
         <?php
 
         } else {
-            do_action( 'wpinv_cart_empty' );
+            do_action('wpinv_cart_empty');
         }
         echo '</div><!--end #wpinv_checkout_wrap-->';
-	    do_action( 'wpinv_checkout_content_after' );
+	    do_action('wpinv_checkout_content_after');
         $content = ob_get_clean();
 
-		return str_replace( 'sr-only', '', $content );
+		return str_replace('sr-only', '', $content);
 }
 
-function wpinv_checkout_cart( $cart_details = array(), $echo = true ) {
+function wpinv_checkout_cart($cart_details = array(), $echo = true) {
     global $ajax_cart_details;
     $ajax_cart_details = $cart_details;
 
     ob_start();
-    do_action( 'wpinv_before_checkout_cart' );
+    do_action('wpinv_before_checkout_cart');
     echo '<div id="wpinv_checkout_cart_form" method="post">';
         echo '<div id="wpinv_checkout_cart_wrap">';
-            wpinv_get_template_part( 'wpinv-checkout-cart' );
+            wpinv_get_template_part('wpinv-checkout-cart');
         echo '</div>';
     echo '</div>';
-    do_action( 'wpinv_after_checkout_cart' );
+    do_action('wpinv_after_checkout_cart');
     $content = ob_get_clean();
 
-    if ( $echo ) {
+    if ($echo) {
         echo $content;
     } else {
         return $content;
     }
 }
-add_action( 'wpinv_checkout_cart', 'wpinv_checkout_cart', 10 );
+add_action('wpinv_checkout_cart', 'wpinv_checkout_cart', 10);
 
 function wpinv_empty_cart_message() {
-	return apply_filters( 'wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __( 'Your cart is empty.', 'invoicing' ) . '</span>' );
+	return apply_filters('wpinv_empty_cart_message', '<span class="wpinv_empty_cart">' . __('Your cart is empty.', 'invoicing') . '</span>');
 }
 
 /**
@@ -1482,83 +1482,83 @@ 
         )
     );
 }
-add_action( 'wpinv_cart_empty', 'wpinv_empty_checkout_cart' );
+add_action('wpinv_cart_empty', 'wpinv_empty_checkout_cart');
 
 function wpinv_update_cart_button() {
-    if ( !wpinv_item_quantities_enabled() )
+    if (!wpinv_item_quantities_enabled())
         return;
 ?>
-    <input type="submit" name="wpinv_update_cart_submit" class="wpinv-submit wpinv-no-js button" value="<?php _e( 'Update Cart', 'invoicing' ); ?>"/>
+    <input type="submit" name="wpinv_update_cart_submit" class="wpinv-submit wpinv-no-js button" value="<?php _e('Update Cart', 'invoicing'); ?>"/>
     <input type="hidden" name="wpi_action" value="update_cart"/>
 <?php
 }
 
 function wpinv_checkout_cart_columns() {
     $default = 3;
-    if ( wpinv_item_quantities_enabled() ) {
+    if (wpinv_item_quantities_enabled()) {
         $default++;
     }
     
-    if ( wpinv_use_taxes() ) {
+    if (wpinv_use_taxes()) {
         $default++;
     }
 
-    return apply_filters( 'wpinv_checkout_cart_columns', $default );
+    return apply_filters('wpinv_checkout_cart_columns', $default);
 }
 
 function wpinv_display_cart_messages() {
     global $wpi_session;
 
-    $messages = $wpi_session->get( 'wpinv_cart_messages' );
+    $messages = $wpi_session->get('wpinv_cart_messages');
 
-    if ( $messages ) {
-        foreach ( $messages as $message_id => $message ) {
+    if ($messages) {
+        foreach ($messages as $message_id => $message) {
             // Try and detect what type of message this is
-            if ( strpos( strtolower( $message ), 'error' ) ) {
+            if (strpos(strtolower($message), 'error')) {
                 $type = 'error';
-            } elseif ( strpos( strtolower( $message ), 'success' ) ) {
+            } elseif (strpos(strtolower($message), 'success')) {
                 $type = 'success';
             } else {
                 $type = 'info';
             }
 
-            $classes = apply_filters( 'wpinv_' . $type . '_class', array( 'wpinv_errors', 'wpinv-alert', 'wpinv-alert-' . $type ) );
+            $classes = apply_filters('wpinv_' . $type . '_class', array('wpinv_errors', 'wpinv-alert', 'wpinv-alert-' . $type));
 
-            echo '<div class="' . implode( ' ', $classes ) . '">';
+            echo '<div class="' . implode(' ', $classes) . '">';
                 // Loop message codes and display messages
                     echo '<p class="wpinv_error" id="wpinv_msg_' . $message_id . '">' . $message . '</p>';
             echo '</div>';
         }
 
         // Remove all of the cart saving messages
-        $wpi_session->set( 'wpinv_cart_messages', null );
+        $wpi_session->set('wpinv_cart_messages', null);
     }
 }
-add_action( 'wpinv_before_checkout_cart', 'wpinv_display_cart_messages' );
+add_action('wpinv_before_checkout_cart', 'wpinv_display_cart_messages');
 
 function wpinv_discount_field() {
-    if ( isset( $_GET['wpi-gateway'] ) && wpinv_is_ajax_disabled() ) {
+    if (isset($_GET['wpi-gateway']) && wpinv_is_ajax_disabled()) {
         return; // Only show before a payment method has been selected if ajax is disabled
     }
 
-    if ( !wpinv_is_checkout() ) {
+    if (!wpinv_is_checkout()) {
         return;
     }
 
-    if ( wpinv_has_active_discounts() && wpinv_get_cart_total() ) {
+    if (wpinv_has_active_discounts() && wpinv_get_cart_total()) {
     ?>
     <div id="wpinv-discount-field" class="panel panel-default">
         <div class="panel-body">
             <p>
-                <label class="wpinv-label" for="wpinv_discount_code"><strong><?php _e( 'Discount', 'invoicing' ); ?></strong></label>
-                <span class="wpinv-description"><?php _e( 'Enter a discount code if you have one.', 'invoicing' ); ?></span>
+                <label class="wpinv-label" for="wpinv_discount_code"><strong><?php _e('Discount', 'invoicing'); ?></strong></label>
+                <span class="wpinv-description"><?php _e('Enter a discount code if you have one.', 'invoicing'); ?></span>
             </p>
             <div class="form-group row">
                 <div class="col-sm-4">
-                    <input class="wpinv-input form-control" type="text" id="wpinv_discount_code" name="wpinv_discount_code" placeholder="<?php _e( 'Enter discount code', 'invoicing' ); ?>"/>
+                    <input class="wpinv-input form-control" type="text" id="wpinv_discount_code" name="wpinv_discount_code" placeholder="<?php _e('Enter discount code', 'invoicing'); ?>"/>
                 </div>
                 <div class="col-sm-3">
-                    <button id="wpi-apply-discount" type="button" class="btn btn-success btn-sm"><?php _e( 'Apply Discount', 'invoicing' ); ?></button>
+                    <button id="wpi-apply-discount" type="button" class="btn btn-success btn-sm"><?php _e('Apply Discount', 'invoicing'); ?></button>
                 </div>
                 <div style="clear:both"></div>
                 <div class="col-sm-12 wpinv-discount-msg">
@@ -1571,10 +1571,10 @@ 
 <?php
     }
 }
-add_action( 'wpinv_after_checkout_cart', 'wpinv_discount_field', -10 );
+add_action('wpinv_after_checkout_cart', 'wpinv_discount_field', -10);
 
 function wpinv_agree_to_terms_js() {
-    if ( wpinv_get_option( 'show_agree_to_terms', false ) ) {
+    if (wpinv_get_option('show_agree_to_terms', false)) {
 ?>
 <script type="text/javascript">
     jQuery(document).ready(function($){
@@ -1589,125 +1589,125 @@ 
 <?php
     }
 }
-add_action( 'wpinv_checkout_form_top', 'wpinv_agree_to_terms_js' );
+add_action('wpinv_checkout_form_top', 'wpinv_agree_to_terms_js');
 
 function wpinv_payment_mode_select() {
-    $gateways = wpinv_get_enabled_payment_gateways( true );
-    $gateways = apply_filters( 'wpinv_payment_gateways_on_cart', $gateways );
-    $invoice = wpinv_get_invoice( 0, true );
+    $gateways = wpinv_get_enabled_payment_gateways(true);
+    $gateways = apply_filters('wpinv_payment_gateways_on_cart', $gateways);
+    $invoice = wpinv_get_invoice(0, true);
 
     do_action('wpinv_payment_mode_top');
-    $invoice_id = $invoice ? (int)$invoice->ID : 0;
-    $chosen_gateway = wpinv_get_chosen_gateway( $invoice_id );
+    $invoice_id = $invoice ? (int) $invoice->ID : 0;
+    $chosen_gateway = wpinv_get_chosen_gateway($invoice_id);
     ?>
-    <div id="wpinv_payment_mode_select" data-gateway="<?php echo $chosen_gateway; ?>" <?php echo ( ( $invoice && $invoice->is_free() ) ? 'style="display:none;" data-free="1"' : '' ); ?>>
-            <?php do_action( 'wpinv_payment_mode_before_gateways_wrap' ); ?>
+    <div id="wpinv_payment_mode_select" data-gateway="<?php echo $chosen_gateway; ?>" <?php echo (($invoice && $invoice->is_free()) ? 'style="display:none;" data-free="1"' : ''); ?>>
+            <?php do_action('wpinv_payment_mode_before_gateways_wrap'); ?>
             <div id="wpinv-payment-mode-wrap" class="panel panel-default">
-                <div class="panel-heading wpi-payment_methods_title"><h3 class="panel-title"><?php _e( 'Select Payment Method', 'invoicing' ); ?></h3></div>
+                <div class="panel-heading wpi-payment_methods_title"><h3 class="panel-title"><?php _e('Select Payment Method', 'invoicing'); ?></h3></div>
                 <div class="panel-body list-group wpi-payment_methods">
                     <?php
-                    do_action( 'wpinv_payment_mode_before_gateways' );
-
-                    if ( !empty( $gateways ) ) {
-                        foreach ( $gateways as $gateway_id => $gateway ) {
-                            $checked       = checked( $gateway_id, $chosen_gateway, false );
-                            $button_label  = wpinv_get_gateway_button_label( $gateway_id );
-                            $gateway_label = wpinv_get_gateway_checkout_label( $gateway_id );
-                            $description   = wpinv_get_gateway_description( $gateway_id );
+                    do_action('wpinv_payment_mode_before_gateways');
+
+                    if (!empty($gateways)) {
+                        foreach ($gateways as $gateway_id => $gateway) {
+                            $checked       = checked($gateway_id, $chosen_gateway, false);
+                            $button_label  = wpinv_get_gateway_button_label($gateway_id);
+                            $gateway_label = wpinv_get_gateway_checkout_label($gateway_id);
+                            $description   = wpinv_get_gateway_description($gateway_id);
                             ?>
                             <div class="list-group-item">
                                 <div class="radio">
-                                    <label><input type="radio" data-button-text="<?php echo esc_attr( $button_label );?>" value="<?php echo esc_attr( $gateway_id ) ;?>" <?php echo $checked ;?> id="wpi_gateway_<?php echo esc_attr( $gateway_id );?>" name="wpi-gateway" class="wpi-pmethod"><?php echo esc_html( $gateway_label ); ?></label>
+                                    <label><input type="radio" data-button-text="<?php echo esc_attr($button_label); ?>" value="<?php echo esc_attr($gateway_id); ?>" <?php echo $checked; ?> id="wpi_gateway_<?php echo esc_attr($gateway_id); ?>" name="wpi-gateway" class="wpi-pmethod"><?php echo esc_html($gateway_label); ?></label>
                                 </div>
-                                <div style="display:none;" class="payment_box wpi_gateway_<?php echo esc_attr( $gateway_id );?>" role="alert">
-                                    <?php if ( !empty( $description ) ) { ?>
-                                        <div class="wpi-gateway-desc alert alert-info"><?php _e( $description, 'invoicing' ); ?></div>
+                                <div style="display:none;" class="payment_box wpi_gateway_<?php echo esc_attr($gateway_id); ?>" role="alert">
+                                    <?php if (!empty($description)) { ?>
+                                        <div class="wpi-gateway-desc alert alert-info"><?php _e($description, 'invoicing'); ?></div>
                                     <?php } ?>
-                                    <?php do_action( 'wpinv_' . $gateway_id . '_cc_form', $invoice_id ) ;?>
+                                    <?php do_action('wpinv_' . $gateway_id . '_cc_form', $invoice_id); ?>
                                 </div>
                             </div>
                             <?php
                         }
                     } else {
-                        echo '<div class="alert alert-warning">'. __( 'No payment gateway active', 'invoicing' ) .'</div>';
+                        echo '<div class="alert alert-warning">' . __('No payment gateway active', 'invoicing') . '</div>';
                     }
 
-                    do_action( 'wpinv_payment_mode_after_gateways' );
+                    do_action('wpinv_payment_mode_after_gateways');
                     ?>
                 </div>
             </div>
-            <?php do_action( 'wpinv_payment_mode_after_gateways_wrap' ); ?>
+            <?php do_action('wpinv_payment_mode_after_gateways_wrap'); ?>
     </div>
     <?php
     do_action('wpinv_payment_mode_bottom');
 }
-add_action( 'wpinv_payment_mode_select', 'wpinv_payment_mode_select' );
+add_action('wpinv_payment_mode_select', 'wpinv_payment_mode_select');
 
 function wpinv_checkout_billing_info() {
-    if ( wpinv_is_checkout() ) {
+    if (wpinv_is_checkout()) {
         $billing_details    = wpinv_checkout_billing_details();
-        $selected_country   = !empty( $billing_details['country'] ) ? $billing_details['country'] : wpinv_default_billing_country();
+        $selected_country   = !empty($billing_details['country']) ? $billing_details['country'] : wpinv_default_billing_country();
         ?>
         <div id="wpinv-fields" class="clearfix">
             <div id="wpi-billing" class="wpi-billing clearfix panel panel-default">
-                <div class="panel-heading"><h3 class="panel-title"><?php _e( 'Billing Details', 'invoicing' );?></h3></div>
+                <div class="panel-heading"><h3 class="panel-title"><?php _e('Billing Details', 'invoicing'); ?></h3></div>
                 <div id="wpinv-fields-box" class="panel-body">
-                    <?php do_action( 'wpinv_checkout_billing_fields_first', $billing_details ); ?>
+                    <?php do_action('wpinv_checkout_billing_fields_first', $billing_details); ?>
                     <p class="wpi-cart-field wpi-col2 wpi-colf">
-                        <label for="wpinv_first_name" class="wpi-label"><?php _e( 'First Name', 'invoicing' );?><?php if ( wpinv_get_option( 'fname_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <label for="wpinv_first_name" class="wpi-label"><?php _e('First Name', 'invoicing'); ?><?php if (wpinv_get_option('fname_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
                         <?php
-                        echo wpinv_html_text( array(
+                        echo wpinv_html_text(array(
                                 'id'            => 'wpinv_first_name',
                                 'name'          => 'wpinv_first_name',
                                 'value'         => $billing_details['first_name'],
                                 'class'         => 'wpi-input form-control',
-                                'placeholder'   => __( 'First name', 'invoicing' ),
-                                'required'      => (bool)wpinv_get_option( 'fname_mandatory' ),
-                            ) );
+                                'placeholder'   => __('First name', 'invoicing'),
+                                'required'      => (bool) wpinv_get_option('fname_mandatory'),
+                            ));
                         ?>
                     </p>
                     <p class="wpi-cart-field wpi-col2 wpi-coll">
-                        <label for="wpinv_last_name" class="wpi-label"><?php _e( 'Last Name', 'invoicing' );?><?php if ( wpinv_get_option( 'lname_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <label for="wpinv_last_name" class="wpi-label"><?php _e('Last Name', 'invoicing'); ?><?php if (wpinv_get_option('lname_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
                         <?php
-                        echo wpinv_html_text( array(
+                        echo wpinv_html_text(array(
                                 'id'            => 'wpinv_last_name',
                                 'name'          => 'wpinv_last_name',
                                 'value'         => $billing_details['last_name'],
                                 'class'         => 'wpi-input form-control',
-                                'placeholder'   => __( 'Last name', 'invoicing' ),
-                                'required'      => (bool)wpinv_get_option( 'lname_mandatory' ),
-                            ) );
+                                'placeholder'   => __('Last name', 'invoicing'),
+                                'required'      => (bool) wpinv_get_option('lname_mandatory'),
+                            ));
                         ?>
                     </p>
                     <p class="wpi-cart-field wpi-col2 wpi-colf">
-                        <label for="wpinv_address" class="wpi-label"><?php _e( 'Address', 'invoicing' );?><?php if ( wpinv_get_option( 'address_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <label for="wpinv_address" class="wpi-label"><?php _e('Address', 'invoicing'); ?><?php if (wpinv_get_option('address_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
                         <?php
-                        echo wpinv_html_text( array(
+                        echo wpinv_html_text(array(
                                 'id'            => 'wpinv_address',
                                 'name'          => 'wpinv_address',
                                 'value'         => $billing_details['address'],
                                 'class'         => 'wpi-input form-control',
-                                'placeholder'   => __( 'Address', 'invoicing' ),
-                                'required'      => (bool)wpinv_get_option( 'address_mandatory' ),
-                            ) );
+                                'placeholder'   => __('Address', 'invoicing'),
+                                'required'      => (bool) wpinv_get_option('address_mandatory'),
+                            ));
                         ?>
                     </p>
                     <p class="wpi-cart-field wpi-col2 wpi-coll">
-                        <label for="wpinv_city" class="wpi-label"><?php _e( 'City', 'invoicing' );?><?php if ( wpinv_get_option( 'city_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <label for="wpinv_city" class="wpi-label"><?php _e('City', 'invoicing'); ?><?php if (wpinv_get_option('city_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
                         <?php
-                        echo wpinv_html_text( array(
+                        echo wpinv_html_text(array(
                                 'id'            => 'wpinv_city',
                                 'name'          => 'wpinv_city',
                                 'value'         => $billing_details['city'],
                                 'class'         => 'wpi-input form-control',
-                                'placeholder'   => __( 'City', 'invoicing' ),
-                                'required'      => (bool)wpinv_get_option( 'city_mandatory' ),
-                            ) );
+                                'placeholder'   => __('City', 'invoicing'),
+                                'required'      => (bool) wpinv_get_option('city_mandatory'),
+                            ));
                         ?>
                     </p>
                     <p id="wpinv_country_box" class="wpi-cart-field wpi-col2 wpi-colf">
-                        <label for="wpinv_country" class="wpi-label"><?php _e( 'Country', 'invoicing' );?><?php if ( wpinv_get_option( 'country_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
-                        <?php echo wpinv_html_select( array(
+                        <label for="wpinv_country" class="wpi-label"><?php _e('Country', 'invoicing'); ?><?php if (wpinv_get_option('country_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <?php echo wpinv_html_select(array(
                             'options'          => wpinv_get_country_list(),
                             'name'             => 'wpinv_country',
                             'id'               => 'wpinv_country',
@@ -1715,16 +1715,16 @@ 
                             'show_option_all'  => false,
                             'show_option_none' => false,
                             'class'            => 'wpi-input form-control wpi_select2',
-                            'placeholder'      => __( 'Choose a country', 'invoicing' ),
-                            'required'         => (bool)wpinv_get_option( 'country_mandatory' ),
-                        ) ); ?>
+                            'placeholder'      => __('Choose a country', 'invoicing'),
+                            'required'         => (bool) wpinv_get_option('country_mandatory'),
+                        )); ?>
                     </p>
                     <p id="wpinv_state_box" class="wpi-cart-field wpi-col2 wpi-coll">
-                        <label for="wpinv_state" class="wpi-label"><?php _e( 'State / Province', 'invoicing' );?><?php if ( wpinv_get_option( 'state_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <label for="wpinv_state" class="wpi-label"><?php _e('State / Province', 'invoicing'); ?><?php if (wpinv_get_option('state_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
                         <?php
-                        $states = wpinv_get_country_states( $selected_country );
-                        if( !empty( $states ) ) {
-                            echo wpinv_html_select( array(
+                        $states = wpinv_get_country_states($selected_country);
+                        if (!empty($states)) {
+                            echo wpinv_html_select(array(
                                 'options'          => $states,
                                 'name'             => 'wpinv_state',
                                 'id'               => 'wpinv_state',
@@ -1732,61 +1732,61 @@ 
                                 'show_option_all'  => false,
                                 'show_option_none' => false,
                                 'class'            => 'wpi-input form-control wpi_select2',
-                                'placeholder'      => __( 'Choose a state', 'invoicing' ),
-                                'required'         => (bool)wpinv_get_option( 'state_mandatory' ),
-                            ) );
+                                'placeholder'      => __('Choose a state', 'invoicing'),
+                                'required'         => (bool) wpinv_get_option('state_mandatory'),
+                            ));
                         } else {
-                            echo wpinv_html_text( array(
+                            echo wpinv_html_text(array(
                                 'name'          => 'wpinv_state',
                                 'value'         => $billing_details['state'],
                                 'id'            => 'wpinv_state',
                                 'class'         => 'wpi-input form-control',
-                                'placeholder'   => __( 'State / Province', 'invoicing' ),
-                                'required'      => (bool)wpinv_get_option( 'state_mandatory' ),
-                            ) );
+                                'placeholder'   => __('State / Province', 'invoicing'),
+                                'required'      => (bool) wpinv_get_option('state_mandatory'),
+                            ));
                         }
                         ?>
                     </p>
                     <p class="wpi-cart-field wpi-col2 wpi-colf">
-                        <label for="wpinv_zip" class="wpi-label"><?php _e( 'ZIP / Postcode', 'invoicing' );?><?php if ( wpinv_get_option( 'zip_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <label for="wpinv_zip" class="wpi-label"><?php _e('ZIP / Postcode', 'invoicing'); ?><?php if (wpinv_get_option('zip_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
                         <?php
-                        echo wpinv_html_text( array(
+                        echo wpinv_html_text(array(
                                 'name'          => 'wpinv_zip',
                                 'value'         => $billing_details['zip'],
                                 'id'            => 'wpinv_zip',
                                 'class'         => 'wpi-input form-control',
-                                'placeholder'   => __( 'ZIP / Postcode', 'invoicing' ),
-                                'required'      => (bool)wpinv_get_option( 'zip_mandatory' ),
-                            ) );
+                                'placeholder'   => __('ZIP / Postcode', 'invoicing'),
+                                'required'      => (bool) wpinv_get_option('zip_mandatory'),
+                            ));
                         ?>
                     </p>
                     <p class="wpi-cart-field wpi-col2 wpi-coll">
-                        <label for="wpinv_phone" class="wpi-label"><?php _e( 'Phone', 'invoicing' );?><?php if ( wpinv_get_option( 'phone_mandatory' ) ) { echo '<span class="wpi-required">*</span>'; } ?></label>
+                        <label for="wpinv_phone" class="wpi-label"><?php _e('Phone', 'invoicing'); ?><?php if (wpinv_get_option('phone_mandatory')) { echo '<span class="wpi-required">*</span>'; } ?></label>
                         <?php
-                        echo wpinv_html_text( array(
+                        echo wpinv_html_text(array(
                                 'id'            => 'wpinv_phone',
                                 'name'          => 'wpinv_phone',
                                 'value'         => $billing_details['phone'],
                                 'class'         => 'wpi-input form-control',
-                                'placeholder'   => __( 'Phone', 'invoicing' ),
-                                'required'      => (bool)wpinv_get_option( 'phone_mandatory' ),
-                            ) );
+                                'placeholder'   => __('Phone', 'invoicing'),
+                                'required'      => (bool) wpinv_get_option('phone_mandatory'),
+                            ));
                         ?>
                     </p>
-                    <?php do_action( 'wpinv_checkout_billing_fields_last', $billing_details ); ?>
+                    <?php do_action('wpinv_checkout_billing_fields_last', $billing_details); ?>
                     <div class="clearfix"></div>
                 </div>
             </div>
-            <?php do_action( 'wpinv_after_billing_fields', $billing_details ); ?>
+            <?php do_action('wpinv_after_billing_fields', $billing_details); ?>
         </div>
         <?php
     }
 }
-add_action( 'wpinv_checkout_billing_info', 'wpinv_checkout_billing_info' );
+add_action('wpinv_checkout_billing_info', 'wpinv_checkout_billing_info');
 
 function wpinv_checkout_hidden_fields() {
 ?>
-    <?php if ( is_user_logged_in() ) { ?>
+    <?php if (is_user_logged_in()) { ?>
     <input type="hidden" name="wpinv_user_id" value="<?php echo get_current_user_id(); ?>"/>
     <?php } ?>
     <input type="hidden" name="wpi_action" value="payment" />
@@ -1796,9 +1796,9 @@ 
 function wpinv_checkout_button_purchase() {
     ob_start();
 ?>
-    <input type="submit" class="btn btn-success wpinv-submit" id="wpinv-payment-button" data-value="<?php esc_attr_e( 'Proceed to Pay', 'invoicing' ) ?>" name="wpinv_payment" value="<?php esc_attr_e( 'Proceed to Pay', 'invoicing' ) ?>"/>
+    <input type="submit" class="btn btn-success wpinv-submit" id="wpinv-payment-button" data-value="<?php esc_attr_e('Proceed to Pay', 'invoicing') ?>" name="wpinv_payment" value="<?php esc_attr_e('Proceed to Pay', 'invoicing') ?>"/>
 <?php
-    return apply_filters( 'wpinv_checkout_button_purchase', ob_get_clean() );
+    return apply_filters('wpinv_checkout_button_purchase', ob_get_clean());
 }
 
 function wpinv_checkout_total() {
@@ -1807,84 +1807,84 @@ 
 <div id="wpinv_checkout_total" class="panel panel-info">
     <div class="panel-body">
     <?php
-    do_action( 'wpinv_purchase_form_before_checkout_total' );
+    do_action('wpinv_purchase_form_before_checkout_total');
     ?>
-    <strong><?php _e( 'Invoice Total:', 'invoicing' ) ?></strong> <span class="wpinv-chdeckout-total"><?php echo $cart_total;?></span>
+    <strong><?php _e('Invoice Total:', 'invoicing') ?></strong> <span class="wpinv-chdeckout-total"><?php echo $cart_total; ?></span>
     <?php
-    do_action( 'wpinv_purchase_form_after_checkout_total' );
+    do_action('wpinv_purchase_form_after_checkout_total');
     ?>
     </div>
 </div>
 <?php
 }
-add_action( 'wpinv_checkout_form_bottom', 'wpinv_checkout_total', 9998 );
+add_action('wpinv_checkout_form_bottom', 'wpinv_checkout_total', 9998);
 
 function wpinv_checkout_accept_tandc() {
-    $page = wpinv_get_option( 'tandc_page' );
+    $page = wpinv_get_option('tandc_page');
     ?>
     <div id="wpinv_checkout_tandc" class="panel panel-success">
         <div class="panel-body">
             <?php echo wpinv_get_policy_text(); ?>
             <?php
-            if(isset($page) && (int)$page > 0 && apply_filters( 'wpinv_checkout_show_terms', true )){
-                $terms_link = esc_url( get_permalink( $page ) );
+            if (isset($page) && (int) $page > 0 && apply_filters('wpinv_checkout_show_terms', true)) {
+                $terms_link = esc_url(get_permalink($page));
                 ?>
                 <label class="">
-                    <input type="checkbox" class="wpi-terms-checkbox" name="wpi_terms" id="wpi-terms" <?php checked( apply_filters( 'wpinv_terms_is_checked_default', isset( $_POST['wpi_terms'] ) ), true ); ?>> <span><?php printf( __( 'I&rsquo;ve read and accept the <a href="%s" target="_blank" class="wpi-terms-and-conditions-link">terms &amp; conditions</a>', 'invoicing' ), $terms_link ); ?></span> <span class="wpi-required">*</span>
+                    <input type="checkbox" class="wpi-terms-checkbox" name="wpi_terms" id="wpi-terms" <?php checked(apply_filters('wpinv_terms_is_checked_default', isset($_POST['wpi_terms'])), true); ?>> <span><?php printf(__('I&rsquo;ve read and accept the <a href="%s" target="_blank" class="wpi-terms-and-conditions-link">terms &amp; conditions</a>', 'invoicing'), $terms_link); ?></span> <span class="wpi-required">*</span>
                 </label>
             <?php } ?>
         </div>
     </div>
     <?php
 }
-add_action( 'wpinv_checkout_form_bottom', 'wpinv_checkout_accept_tandc', 9995 );
+add_action('wpinv_checkout_form_bottom', 'wpinv_checkout_accept_tandc', 9995);
 
 function wpinv_checkout_submit() {
 ?>
 <div id="wpinv_purchase_submit" class="panel panel-success">
     <div class="panel-body text-center">
     <?php
-    do_action( 'wpinv_purchase_form_before_submit' );
+    do_action('wpinv_purchase_form_before_submit');
     wpinv_checkout_hidden_fields();
     echo wpinv_checkout_button_purchase();
-    do_action( 'wpinv_purchase_form_after_submit' );
+    do_action('wpinv_purchase_form_after_submit');
     ?>
     </div>
 </div>
 <?php
 }
-add_action( 'wpinv_checkout_form_bottom', 'wpinv_checkout_submit', 9999 );
+add_action('wpinv_checkout_form_bottom', 'wpinv_checkout_submit', 9999);
 
-function wpinv_receipt_billing_address( $invoice_id = 0 ) {
-    $invoice = wpinv_get_invoice( $invoice_id );
+function wpinv_receipt_billing_address($invoice_id = 0) {
+    $invoice = wpinv_get_invoice($invoice_id);
 
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
         return NULL;
     }
 
     $billing_details = $invoice->get_user_info();
-    $address_row = wpinv_get_invoice_address_markup( $billing_details );
+    $address_row = wpinv_get_invoice_address_markup($billing_details);
 
     ob_start();
     ?>
     <table class="table table-bordered table-sm wpi-billing-details">
         <tbody>
             <tr class="wpi-receipt-name">
-                <th class="text-left"><?php _e( 'Name', 'invoicing' ); ?></th>
-                <td><?php echo esc_html( trim( $billing_details['first_name'] . ' ' . $billing_details['last_name'] ) ) ;?></td>
+                <th class="text-left"><?php _e('Name', 'invoicing'); ?></th>
+                <td><?php echo esc_html(trim($billing_details['first_name'] . ' ' . $billing_details['last_name'])); ?></td>
             </tr>
             <tr class="wpi-receipt-email">
-                <th class="text-left"><?php _e( 'Email', 'invoicing' ); ?></th>
-                <td><?php echo $billing_details['email'] ;?></td>
+                <th class="text-left"><?php _e('Email', 'invoicing'); ?></th>
+                <td><?php echo $billing_details['email']; ?></td>
             </tr>
             <tr class="wpi-receipt-address">
-                <th class="text-left"><?php _e( 'Address', 'invoicing' ); ?></th>
-                <td><?php echo $address_row ;?></td>
+                <th class="text-left"><?php _e('Address', 'invoicing'); ?></th>
+                <td><?php echo $address_row; ?></td>
             </tr>
-            <?php if ( $billing_details['phone'] ) { ?>
+            <?php if ($billing_details['phone']) { ?>
             <tr class="wpi-receipt-phone">
-                <th class="text-left"><?php _e( 'Phone', 'invoicing' ); ?></th>
-                <td><?php echo esc_html( $billing_details['phone'] ) ;?></td>
+                <th class="text-left"><?php _e('Phone', 'invoicing'); ?></th>
+                <td><?php echo esc_html($billing_details['phone']); ?></td>
             </tr>
             <?php } ?>
         </tbody>
@@ -1892,74 +1892,74 @@ 
     <?php
     $output = ob_get_clean();
     
-    $output = apply_filters( 'wpinv_receipt_billing_address', $output, $invoice_id );
+    $output = apply_filters('wpinv_receipt_billing_address', $output, $invoice_id);
 
     echo $output;
 }
 
-function wpinv_filter_success_page_content( $content ) {
-    if ( isset( $_GET['payment-confirm'] ) && wpinv_is_success_page() ) {
-        if ( has_filter( 'wpinv_payment_confirm_' . sanitize_text_field( $_GET['payment-confirm'] ) ) ) {
-            $content = apply_filters( 'wpinv_payment_confirm_' . sanitize_text_field( $_GET['payment-confirm'] ), $content );
+function wpinv_filter_success_page_content($content) {
+    if (isset($_GET['payment-confirm']) && wpinv_is_success_page()) {
+        if (has_filter('wpinv_payment_confirm_' . sanitize_text_field($_GET['payment-confirm']))) {
+            $content = apply_filters('wpinv_payment_confirm_' . sanitize_text_field($_GET['payment-confirm']), $content);
         }
     }
 
     return $content;
 }
-add_filter( 'the_content', 'wpinv_filter_success_page_content', 99999 );
+add_filter('the_content', 'wpinv_filter_success_page_content', 99999);
 
-function wpinv_receipt_actions( $invoice ) {
-    if ( !empty( $invoice ) ) {
+function wpinv_receipt_actions($invoice) {
+    if (!empty($invoice)) {
         $actions = array();
 
-        if ( wpinv_user_can_view_invoice( $invoice->ID ) ) {
-            $actions['print']   = array(
-                'url'  => $invoice->get_view_url( true ),
-                'name' => __( 'Print Invoice', 'invoicing' ),
+        if (wpinv_user_can_view_invoice($invoice->ID)) {
+            $actions['print'] = array(
+                'url'  => $invoice->get_view_url(true),
+                'name' => __('Print Invoice', 'invoicing'),
                 'class' => 'btn-primary',
             );
         }
 
-        if ( is_user_logged_in() ) {
+        if (is_user_logged_in()) {
             $actions['history'] = array(
                 'url'  => wpinv_get_history_page_uri(),
-                'name' => __( 'Invoice History', 'invoicing' ),
+                'name' => __('Invoice History', 'invoicing'),
                 'class' => 'btn-warning',
             );
         }
 
-        $actions = apply_filters( 'wpinv_invoice_receipt_actions', $actions, $invoice );
+        $actions = apply_filters('wpinv_invoice_receipt_actions', $actions, $invoice);
 
-        if ( !empty( $actions ) ) {
+        if (!empty($actions)) {
         ?>
         <div class="wpinv-receipt-actions text-right">
-            <?php foreach ( $actions as $key => $action ) { $class = !empty($action['class']) ? sanitize_html_class( $action['class'] ) : ''; ?>
-            <a href="<?php echo esc_url( $action['url'] );?>" class="btn btn-sm <?php echo $class . ' ' . sanitize_html_class( $key );?>" <?php echo ( !empty($action['attrs']) ? $action['attrs'] : '' ) ;?>><?php echo esc_html( $action['name'] );?></a>
+            <?php foreach ($actions as $key => $action) { $class = !empty($action['class']) ? sanitize_html_class($action['class']) : ''; ?>
+            <a href="<?php echo esc_url($action['url']); ?>" class="btn btn-sm <?php echo $class . ' ' . sanitize_html_class($key); ?>" <?php echo (!empty($action['attrs']) ? $action['attrs'] : ''); ?>><?php echo esc_html($action['name']); ?></a>
             <?php } ?>
         </div>
         <?php
         }
     }
 }
-add_action( 'wpinv_receipt_start', 'wpinv_receipt_actions', -10, 1 );
+add_action('wpinv_receipt_start', 'wpinv_receipt_actions', -10, 1);
 
-function wpinv_invoice_link( $invoice_id ) {
-    $invoice = wpinv_get_invoice( $invoice_id );
+function wpinv_invoice_link($invoice_id) {
+    $invoice = wpinv_get_invoice($invoice_id);
 
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
         return NULL;
     }
 
-    $invoice_link = '<a href="' . esc_url( $invoice->get_view_url() ) . '">' . $invoice->get_number() . '</a>';
+    $invoice_link = '<a href="' . esc_url($invoice->get_view_url()) . '">' . $invoice->get_number() . '</a>';
 
-    return apply_filters( 'wpinv_get_invoice_link', $invoice_link, $invoice );
+    return apply_filters('wpinv_get_invoice_link', $invoice_link, $invoice);
 }
 
-function wpinv_invoice_subscription_details( $invoice ) {
-    if ( !empty( $invoice ) && $invoice->is_recurring() && ! wpinv_is_subscription_payment( $invoice ) ) {
-        $subscription = wpinv_get_subscription( $invoice, true );
+function wpinv_invoice_subscription_details($invoice) {
+    if (!empty($invoice) && $invoice->is_recurring() && !wpinv_is_subscription_payment($invoice)) {
+        $subscription = wpinv_get_subscription($invoice, true);
 
-        if ( empty( $subscription ) ) {
+        if (empty($subscription)) {
             return;
         }
 
@@ -1970,15 +1970,15 @@ 
         $payments = $subscription->get_child_payments();
         ?>
         <div class="wpinv-subscriptions-details">
-            <h3 class="wpinv-subscriptions-t"><?php echo apply_filters( 'wpinv_subscription_details_title', __( 'Subscription Details', 'invoicing' ) ); ?></h3>
+            <h3 class="wpinv-subscriptions-t"><?php echo apply_filters('wpinv_subscription_details_title', __('Subscription Details', 'invoicing')); ?></h3>
             <table class="table">
                 <thead>
                     <tr>
-                        <th><?php _e( 'Billing Cycle', 'invoicing' ) ;?></th>
-                        <th><?php _e( 'Start Date', 'invoicing' ) ;?></th>
-                        <th><?php _e( 'Expiration Date', 'invoicing' ) ;?></th>
-                        <th class="text-center"><?php _e( 'Times Billed', 'invoicing' ) ;?></th>
-                        <th class="text-center"><?php _e( 'Status', 'invoicing' ) ;?></th>
+                        <th><?php _e('Billing Cycle', 'invoicing'); ?></th>
+                        <th><?php _e('Start Date', 'invoicing'); ?></th>
+                        <th><?php _e('Expiration Date', 'invoicing'); ?></th>
+                        <th class="text-center"><?php _e('Times Billed', 'invoicing'); ?></th>
+                        <th class="text-center"><?php _e('Status', 'invoicing'); ?></th>
                     </tr>
                 </thead>
                 <tbody>
@@ -1992,29 +1992,29 @@ 
                 </tbody>
             </table>
         </div>
-        <?php if ( !empty( $payments ) ) { ?>
+        <?php if (!empty($payments)) { ?>
         <div class="wpinv-renewal-payments">
-            <h3 class="wpinv-renewals-t"><?php echo apply_filters( 'wpinv_renewal_payments_title', __( 'Renewal Payments', 'invoicing' ) ); ?></h3>
+            <h3 class="wpinv-renewals-t"><?php echo apply_filters('wpinv_renewal_payments_title', __('Renewal Payments', 'invoicing')); ?></h3>
             <table class="table">
                 <thead>
                     <tr>
                         <th>#</th>
-                        <th><?php _e( 'Invoice', 'invoicing' ) ;?></th>
-                        <th><?php _e( 'Date', 'invoicing' ) ;?></th>
-                        <th class="text-right"><?php _e( 'Amount', 'invoicing' ) ;?></th>
+                        <th><?php _e('Invoice', 'invoicing'); ?></th>
+                        <th><?php _e('Date', 'invoicing'); ?></th>
+                        <th class="text-right"><?php _e('Amount', 'invoicing'); ?></th>
                     </tr>
                 </thead>
                 <tbody>
                     <?php
                         $i = 1;
-                        foreach ( $payments as $payment ) {
+                        foreach ($payments as $payment) {
                             $invoice_id = $payment->ID;
                     ?>
                     <tr>
-                        <th scope="row"><?php echo $i;?></th>
-                        <td><?php echo wpinv_invoice_link( $invoice_id ) ;?></td>
-                        <td><?php echo wpinv_get_invoice_date( $invoice_id ); ?></td>
-                        <td class="text-right"><?php echo wpinv_payment_total( $invoice_id, true ); ?></td>
+                        <th scope="row"><?php echo $i; ?></th>
+                        <td><?php echo wpinv_invoice_link($invoice_id); ?></td>
+                        <td><?php echo wpinv_get_invoice_date($invoice_id); ?></td>
+                        <td class="text-right"><?php echo wpinv_payment_total($invoice_id, true); ?></td>
                     </tr>
                     <?php $i++; } ?>
                 </tbody>
@@ -2025,52 +2025,52 @@ 
     }
 }
 
-function wpinv_cart_total_label( $label, $invoice ) {
-    if ( empty( $invoice ) ) {
+function wpinv_cart_total_label($label, $invoice) {
+    if (empty($invoice)) {
         return $label;
     }
 
     $prefix_label = '';
-    if ( $invoice->is_parent() && $item_id = $invoice->get_recurring() ) {
-        $prefix_label   = '<span class="label label-primary label-recurring">' . __( 'Recurring Payment', 'invoicing' ) . '</span> ' . wpinv_subscription_payment_desc( $invoice );
-    } else if ( $invoice->is_renewal() ) {
-        $prefix_label   = '<span class="label label-primary label-renewal">' . __( 'Renewal Payment', 'invoicing' ) . '</span> ';        
+    if ($invoice->is_parent() && $item_id = $invoice->get_recurring()) {
+        $prefix_label   = '<span class="label label-primary label-recurring">' . __('Recurring Payment', 'invoicing') . '</span> ' . wpinv_subscription_payment_desc($invoice);
+    } else if ($invoice->is_renewal()) {
+        $prefix_label   = '<span class="label label-primary label-renewal">' . __('Renewal Payment', 'invoicing') . '</span> ';        
     }
 
-    if ( $prefix_label != '' ) {
-        $label  = '<span class="wpinv-cart-sub-desc">' . $prefix_label . '</span> ' . $label;
+    if ($prefix_label != '') {
+        $label = '<span class="wpinv-cart-sub-desc">' . $prefix_label . '</span> ' . $label;
     }
 
     return $label;
 }
-add_filter( 'wpinv_cart_total_label', 'wpinv_cart_total_label', 10, 2 );
-add_filter( 'wpinv_email_cart_total_label', 'wpinv_cart_total_label', 10, 2 );
-add_filter( 'wpinv_print_cart_total_label', 'wpinv_cart_total_label', 10, 2 );
+add_filter('wpinv_cart_total_label', 'wpinv_cart_total_label', 10, 2);
+add_filter('wpinv_email_cart_total_label', 'wpinv_cart_total_label', 10, 2);
+add_filter('wpinv_print_cart_total_label', 'wpinv_cart_total_label', 10, 2);
 
-add_action( 'wpinv_invoice_print_middle', 'wpinv_invoice_subscription_details', 10, 1 );
+add_action('wpinv_invoice_print_middle', 'wpinv_invoice_subscription_details', 10, 1);
 
-function wpinv_invoice_print_description( $invoice ) {
-    if ( empty( $invoice ) ) {
+function wpinv_invoice_print_description($invoice) {
+    if (empty($invoice)) {
         return NULL;
     }
-    if ( $description = wpinv_get_invoice_description( $invoice->ID ) ) {
+    if ($description = wpinv_get_invoice_description($invoice->ID)) {
         ?>
         <div class="row wpinv-lower">
             <div class="col-sm-12 wpinv-description">
-                <?php echo wpautop( $description ); ?>
+                <?php echo wpautop($description); ?>
             </div>
         </div>
         <?php
     }
 }
-add_action( 'wpinv_invoice_print_middle', 'wpinv_invoice_print_description', 10.1, 1 );
+add_action('wpinv_invoice_print_middle', 'wpinv_invoice_print_description', 10.1, 1);
 
-function wpinv_invoice_print_payment_info( $invoice ) {
-    if ( empty( $invoice ) ) {
+function wpinv_invoice_print_payment_info($invoice) {
+    if (empty($invoice)) {
         return NULL;
     }
 
-    if ( $payments_info = wpinv_display_payments_info( $invoice->ID, false ) ) {
+    if ($payments_info = wpinv_display_payments_info($invoice->ID, false)) {
         ?>
         <div class="row wpinv-payments">
             <div class="col-sm-12">
@@ -2082,43 +2082,43 @@ 
 }
 // add_action( 'wpinv_invoice_print_after_line_items', 'wpinv_invoice_print_payment_info', 10, 1 );
 
-function wpinv_get_invoice_note_line_item( $note, $echo = true ) {
-    if ( empty( $note ) ) {
+function wpinv_get_invoice_note_line_item($note, $echo = true) {
+    if (empty($note)) {
         return NULL;
     }
 
-    if ( is_int( $note ) ) {
-        $note = get_comment( $note );
+    if (is_int($note)) {
+        $note = get_comment($note);
     }
 
-    if ( !( is_object( $note ) && is_a( $note, 'WP_Comment' ) ) ) {
+    if (!(is_object($note) && is_a($note, 'WP_Comment'))) {
         return NULL;
     }
 
-    $note_classes   = array( 'note' );
-    $note_classes[] = get_comment_meta( $note->comment_ID, '_wpi_customer_note', true ) ? 'customer-note' : '';
+    $note_classes   = array('note');
+    $note_classes[] = get_comment_meta($note->comment_ID, '_wpi_customer_note', true) ? 'customer-note' : '';
     $note_classes[] = $note->comment_author === 'System' ? 'system-note' : '';
-    $note_classes   = apply_filters( 'wpinv_invoice_note_class', array_filter( $note_classes ), $note );
-    $note_classes   = !empty( $note_classes ) ? implode( ' ', $note_classes ) : '';
+    $note_classes   = apply_filters('wpinv_invoice_note_class', array_filter($note_classes), $note);
+    $note_classes   = !empty($note_classes) ? implode(' ', $note_classes) : '';
 
     ob_start();
     ?>
-    <li rel="<?php echo absint( $note->comment_ID ) ; ?>" class="<?php echo esc_attr( $note_classes ); ?>">
+    <li rel="<?php echo absint($note->comment_ID); ?>" class="<?php echo esc_attr($note_classes); ?>">
         <div class="note_content">
-            <?php echo wpautop( wptexturize( wp_kses_post( $note->comment_content ) ) ); ?>
+            <?php echo wpautop(wptexturize(wp_kses_post($note->comment_content))); ?>
         </div>
         <p class="meta">
-            <abbr class="exact-date" title="<?php echo $note->comment_date; ?>"><?php printf( __( '%1$s - %2$s at %3$s', 'invoicing' ), $note->comment_author, date_i18n( get_option( 'date_format' ), strtotime( $note->comment_date ) ), date_i18n( get_option( 'time_format' ), strtotime( $note->comment_date ) ) ); ?></abbr>&nbsp;&nbsp;
-            <?php if ( is_admin() && ( $note->comment_author !== 'System' || wpinv_current_user_can_manage_invoicing() ) ) { ?>
-                <a href="#" class="delete_note"><?php _e( 'Delete note', 'invoicing' ); ?></a>
+            <abbr class="exact-date" title="<?php echo $note->comment_date; ?>"><?php printf(__('%1$s - %2$s at %3$s', 'invoicing'), $note->comment_author, date_i18n(get_option('date_format'), strtotime($note->comment_date)), date_i18n(get_option('time_format'), strtotime($note->comment_date))); ?></abbr>&nbsp;&nbsp;
+            <?php if (is_admin() && ($note->comment_author !== 'System' || wpinv_current_user_can_manage_invoicing())) { ?>
+                <a href="#" class="delete_note"><?php _e('Delete note', 'invoicing'); ?></a>
             <?php } ?>
         </p>
     </li>
     <?php
     $note_content = ob_get_clean();
-    $note_content = apply_filters( 'wpinv_get_invoice_note_line_item', $note_content, $note, $echo );
+    $note_content = apply_filters('wpinv_get_invoice_note_line_item', $note_content, $note, $echo);
 
-    if ( $echo ) {
+    if ($echo) {
         echo $note_content;
     } else {
         return $note_content;
@@ -2128,43 +2128,43 @@ 
 function wpinv_invalid_invoice_content() {
     global $post;
 
-    $invoice = wpinv_get_invoice( $post->ID );
+    $invoice = wpinv_get_invoice($post->ID);
 
-    $error = __( 'This invoice is only viewable by clicking on the invoice link that was sent to you via email.', 'invoicing' );
-    if ( !empty( $invoice->ID ) && $invoice->has_status( array_keys( wpinv_get_invoice_statuses() ) ) ) {
-        if ( is_user_logged_in() ) {
-            if ( wpinv_require_login_to_checkout() ) {
-                if ( isset( $_GET['invoice_key'] ) && $_GET['invoice_key'] === $invoice->get_key() ) {
-                    $error = __( 'You are not allowed to view this invoice.', 'invoicing' );
+    $error = __('This invoice is only viewable by clicking on the invoice link that was sent to you via email.', 'invoicing');
+    if (!empty($invoice->ID) && $invoice->has_status(array_keys(wpinv_get_invoice_statuses()))) {
+        if (is_user_logged_in()) {
+            if (wpinv_require_login_to_checkout()) {
+                if (isset($_GET['invoice_key']) && $_GET['invoice_key'] === $invoice->get_key()) {
+                    $error = __('You are not allowed to view this invoice.', 'invoicing');
                 }
             }
         } else {
-            if ( wpinv_require_login_to_checkout() ) {
-                if ( isset( $_GET['invoice_key'] ) && $_GET['invoice_key'] === $invoice->get_key() ) {
-                    $error = __( 'You must be logged in to view this invoice.', 'invoicing' );
+            if (wpinv_require_login_to_checkout()) {
+                if (isset($_GET['invoice_key']) && $_GET['invoice_key'] === $invoice->get_key()) {
+                    $error = __('You must be logged in to view this invoice.', 'invoicing');
                 }
             }
         }
     } else {
-        $error = __( 'This invoice is deleted or does not exist.', 'invoicing' );
+        $error = __('This invoice is deleted or does not exist.', 'invoicing');
     }
     ?>
     <div class="row wpinv-row-invalid">
         <div class="col-md-6 col-md-offset-3 wpinv-message error">
-            <h3><?php _e( 'Access Denied', 'invoicing' ); ?></h3>
+            <h3><?php _e('Access Denied', 'invoicing'); ?></h3>
             <p class="wpinv-msg-text"><?php echo $error; ?></p>
         </div>
     </div>
     <?php
 }
-add_action( 'wpinv_invalid_invoice_content', 'wpinv_invalid_invoice_content' );
+add_action('wpinv_invalid_invoice_content', 'wpinv_invalid_invoice_content');
 
-add_action( 'wpinv_checkout_billing_fields_last', 'wpinv_force_company_name_field');
-function wpinv_force_company_name_field(){
+add_action('wpinv_checkout_billing_fields_last', 'wpinv_force_company_name_field');
+function wpinv_force_company_name_field() {
     $invoice = wpinv_get_invoice_cart();
-    $user_id = wpinv_get_user_id( $invoice->ID );
-    $company = empty( $user_id ) ? "" : get_user_meta( $user_id, '_wpinv_company', true );
-    if ( 1 == wpinv_get_option( 'force_show_company' ) && !wpinv_use_taxes() ) {
+    $user_id = wpinv_get_user_id($invoice->ID);
+    $company = empty($user_id) ? "" : get_user_meta($user_id, '_wpinv_company', true);
+    if (1 == wpinv_get_option('force_show_company') && !wpinv_use_taxes()) {
         ?>
         <p class="wpi-cart-field wpi-col2 wpi-colf">
             <label for="wpinv_company" class="wpi-label"><?php _e('Company Name', 'invoicing'); ?></label>
@@ -2190,21 +2190,21 @@ 
  * @return string
  */
 function wpinv_get_policy_text() {
-    $privacy_page_id = get_option( 'wp_page_for_privacy_policy', 0 );
+    $privacy_page_id = get_option('wp_page_for_privacy_policy', 0);
 
-    $text = wpinv_get_option('invoicing_privacy_checkout_message', sprintf( __( 'Your personal data will be used to process your invoice, payment and for other purposes described in our %s.', 'invoicing' ), '[wpinv_privacy_policy]' ));
+    $text = wpinv_get_option('invoicing_privacy_checkout_message', sprintf(__('Your personal data will be used to process your invoice, payment and for other purposes described in our %s.', 'invoicing'), '[wpinv_privacy_policy]'));
 
-    if(!$privacy_page_id){
-        $privacy_page_id = wpinv_get_option( 'privacy_page', 0 );
+    if (!$privacy_page_id) {
+        $privacy_page_id = wpinv_get_option('privacy_page', 0);
     }
 
-    $privacy_link    = $privacy_page_id ? '<a href="' . esc_url( get_permalink( $privacy_page_id ) ) . '" class="wpinv-privacy-policy-link" target="_blank">' . __( 'privacy policy', 'invoicing' ) . '</a>' : __( 'privacy policy', 'invoicing' );
+    $privacy_link = $privacy_page_id ? '<a href="' . esc_url(get_permalink($privacy_page_id)) . '" class="wpinv-privacy-policy-link" target="_blank">' . __('privacy policy', 'invoicing') . '</a>' : __('privacy policy', 'invoicing');
 
     $find_replace = array(
         '[wpinv_privacy_policy]' => $privacy_link,
     );
 
-    $privacy_text = str_replace( array_keys( $find_replace ), array_values( $find_replace ), $text );
+    $privacy_text = str_replace(array_keys($find_replace), array_values($find_replace), $text);
 
     return wp_kses_post(wpautop($privacy_text));
 }
@@ -2213,25 +2213,25 @@ 
 /**
  * Allows the user to set their own price for an invoice item
  */
-function wpinv_checkout_cart_item_name_your_price( $cart_item, $key ) {
+function wpinv_checkout_cart_item_name_your_price($cart_item, $key) {
     
     //Ensure we have an item id
-    if(! is_array( $cart_item ) || empty( $cart_item['id'] ) ) {
+    if (!is_array($cart_item) || empty($cart_item['id'])) {
         return;
     }
 
     //Fetch the item
     $item_id = $cart_item['id'];
-    $item    = new WPInv_Item( $item_id );
+    $item    = new WPInv_Item($item_id);
     
-    if(! $item->supports_dynamic_pricing() || !$item->get_is_dynamic_pricing() ) {
+    if (!$item->supports_dynamic_pricing() || !$item->get_is_dynamic_pricing()) {
         return;
     }
 
     //Fetch the dynamic pricing "strings"
-    $suggested_price_text = esc_html( wpinv_get_option( 'suggested_price_text', __( 'Suggested Price:', 'invoicing' ) ) );
-    $minimum_price_text   = esc_html( wpinv_get_option( 'minimum_price_text', __( 'Minimum Price:', 'invoicing' ) ) );
-    $name_your_price_text = esc_html( wpinv_get_option( 'name_your_price_text', __( 'Name Your Price', 'invoicing' ) ) );
+    $suggested_price_text = esc_html(wpinv_get_option('suggested_price_text', __('Suggested Price:', 'invoicing')));
+    $minimum_price_text   = esc_html(wpinv_get_option('minimum_price_text', __('Minimum Price:', 'invoicing')));
+    $name_your_price_text = esc_html(wpinv_get_option('name_your_price_text', __('Name Your Price', 'invoicing')));
 
     //Display a "name_your_price" button
     echo " &mdash; <a href='#' class='wpinv-name-your-price-frontend small'>$name_your_price_text</a></div>";
@@ -2240,7 +2240,7 @@ 
     echo '<div class="name-your-price-miniform">';
     
     //Maybe display the recommended price
-    if( $item->get_price() > 0 && !empty( $suggested_price_text ) ) {
+    if ($item->get_price() > 0 && !empty($suggested_price_text)) {
         $suggested_price = $item->get_the_price();
         echo "<div>$suggested_price_text &mdash; $suggested_price</div>";
     }
@@ -2248,216 +2248,216 @@ 
     //Display the update price form
     $symbol         = wpinv_currency_symbol();
     $position       = wpinv_currency_position();
-    $minimum        = esc_attr( $item->get_minimum_price() );
-    $price          = esc_attr( $cart_item['item_price'] );
-    $update         = esc_attr__( "Update", 'invoicing' );
+    $minimum        = esc_attr($item->get_minimum_price());
+    $price          = esc_attr($cart_item['item_price']);
+    $update         = esc_attr__("Update", 'invoicing');
 
     //Ensure it supports dynamic prici
-    if( $price < $minimum ) {
+    if ($price < $minimum) {
         $price = $minimum;
     }
 
     echo '<label>';
     echo $position != 'right' ? $symbol . '&nbsp;' : '';
     echo "<input type='number' min='$minimum' placeholder='$price' value='$price' class='wpi-field-price' />";
-    echo $position == 'right' ? '&nbsp;' . $symbol : '' ;
+    echo $position == 'right' ? '&nbsp;' . $symbol : '';
     echo "</label>";
     echo "<input type='hidden' value='$item_id' class='wpi-field-item' />";
     echo "<a class='btn btn-success wpinv-submit wpinv-update-dynamic-price-frontend'>$update</a>";
 
     //Maybe display the minimum price
-    if( $item->get_minimum_price() > 0 && !empty( $minimum_price_text ) ) {
-        $minimum_price = wpinv_price( wpinv_format_amount( $item->get_minimum_price() ) );
+    if ($item->get_minimum_price() > 0 && !empty($minimum_price_text)) {
+        $minimum_price = wpinv_price(wpinv_format_amount($item->get_minimum_price()));
         echo "<div>$minimum_price_text &mdash; $minimum_price</div>";
     }
 
     echo "</div>";
 
 }
-add_action( 'wpinv_checkout_cart_item_price_after', 'wpinv_checkout_cart_item_name_your_price', 10, 2 );
+add_action('wpinv_checkout_cart_item_price_after', 'wpinv_checkout_cart_item_name_your_price', 10, 2);
 
 function wpinv_oxygen_fix_conflict() {
     global $ct_ignore_post_types;
 
-    if ( ! is_array( $ct_ignore_post_types ) ) {
+    if (!is_array($ct_ignore_post_types)) {
         $ct_ignore_post_types = array();
     }
 
-    $post_types = array( 'wpi_discount', 'wpi_invoice', 'wpi_item' );
+    $post_types = array('wpi_discount', 'wpi_invoice', 'wpi_item');
 
-    foreach ( $post_types as $post_type ) {
+    foreach ($post_types as $post_type) {
         $ct_ignore_post_types[] = $post_type;
 
         // Ignore post type
-        add_filter( 'pre_option_oxygen_vsb_ignore_post_type_' . $post_type, '__return_true', 999 );
+        add_filter('pre_option_oxygen_vsb_ignore_post_type_' . $post_type, '__return_true', 999);
     }
 
-    remove_filter( 'template_include', 'wpinv_template', 10, 1 );
-    add_filter( 'template_include', 'wpinv_template', 999, 1 );
+    remove_filter('template_include', 'wpinv_template', 10, 1);
+    add_filter('template_include', 'wpinv_template', 999, 1);
 }
 
 /**
  * Helper function to display a payment form on the frontend.
  */
-function getpaid_display_payment_form( $form ) {
+function getpaid_display_payment_form($form) {
     global $invoicing;
 
     // Ensure that it is published.
-	if ( 'publish' != get_post_status( $form ) ) {
+	if ('publish' != get_post_status($form)) {
 		return aui()->alert(
 			array(
 				'type'    => 'warning',
-				'content' => __( 'This payment form is no longer active', 'invoicing' ),
+				'content' => __('This payment form is no longer active', 'invoicing'),
 			)
 		);
 	}
 
     // Get the form elements and items.
-    $form     = absint( $form );
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->get_form_items( $form );
+    $form = absint($form);
+	$elements = $invoicing->form_elements->get_form_elements($form);
+	$items    = $invoicing->form_elements->get_form_items($form);
 
 	ob_start();
 	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
+	do_action('wpinv_payment_form_top');
 	echo "<input type='hidden' name='form_id' value='$form'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+	wp_nonce_field('wpinv_payment_form', 'wpinv_payment_form');
+	wp_nonce_field('vat_validation', '_wpi_nonce');
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+	foreach ($elements as $element) {
+		do_action('wpinv_frontend_render_payment_form_element', $element, $items, $form);
+		do_action("wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form);
 	}
 
 	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
+	do_action('wpinv_payment_form_bottom');
 	echo '</form>';
 
 	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+	return str_replace('sr-only', '', $content);
 }
 
 /**
  * Helper function to display a item payment form on the frontend.
  */
-function getpaid_display_item_payment_form( $items ) {
+function getpaid_display_item_payment_form($items) {
     global $invoicing;
 
-    foreach ( array_keys( $items ) as $id ) {
-	    if ( 'publish' != get_post_status( $id ) ) {
-		    unset( $items[ $id ] );
+    foreach (array_keys($items) as $id) {
+	    if ('publish' != get_post_status($id)) {
+		    unset($items[$id]);
 	    }
     }
 
-    if ( empty( $items ) ) {
+    if (empty($items)) {
 		return aui()->alert(
 			array(
 				'type'    => 'warning',
-				'content' => __( 'No published items found', 'invoicing' ),
+				'content' => __('No published items found', 'invoicing'),
 			)
 		);
     }
 
-    $item_key = getpaid_convert_items_to_string( $items );
+    $item_key = getpaid_convert_items_to_string($items);
 
     // Get the form elements and items.
     $form     = wpinv_get_default_payment_form();
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->convert_normal_items( $items );
+	$elements = $invoicing->form_elements->get_form_elements($form);
+	$items    = $invoicing->form_elements->convert_normal_items($items);
 
 	ob_start();
 	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
+	do_action('wpinv_payment_form_top');
     echo "<input type='hidden' name='form_id' value='$form'/>";
     echo "<input type='hidden' name='form_items' value='$item_key'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+	wp_nonce_field('wpinv_payment_form', 'wpinv_payment_form');
+	wp_nonce_field('vat_validation', '_wpi_nonce');
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+	foreach ($elements as $element) {
+		do_action('wpinv_frontend_render_payment_form_element', $element, $items, $form);
+		do_action("wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form);
 	}
 
 	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
+	do_action('wpinv_payment_form_bottom');
 	echo '</form>';
 
 	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+	return str_replace('sr-only', '', $content);
 }
 
 /**
  * Helper function to display an invoice payment form on the frontend.
  */
-function getpaid_display_invoice_payment_form( $invoice_id ) {
+function getpaid_display_invoice_payment_form($invoice_id) {
     global $invoicing;
 
-    $invoice = wpinv_get_invoice( $invoice_id );
+    $invoice = wpinv_get_invoice($invoice_id);
 
-    if ( empty( $invoice ) ) {
+    if (empty($invoice)) {
 		return aui()->alert(
 			array(
 				'type'    => 'warning',
-				'content' => __( 'Invoice not found', 'invoicing' ),
+				'content' => __('Invoice not found', 'invoicing'),
 			)
 		);
     }
 
-    if ( $invoice->is_paid() ) {
+    if ($invoice->is_paid()) {
 		return aui()->alert(
 			array(
 				'type'    => 'warning',
-				'content' => __( 'Invoice has already been paid', 'invoicing' ),
+				'content' => __('Invoice has already been paid', 'invoicing'),
 			)
 		);
     }
 
     // Get the form elements and items.
-    $form     = wpinv_get_default_payment_form();
-	$elements = $invoicing->form_elements->get_form_elements( $form );
-	$items    = $invoicing->form_elements->convert_checkout_items( $invoice->cart_details, $invoice );
+    $form = wpinv_get_default_payment_form();
+	$elements = $invoicing->form_elements->get_form_elements($form);
+	$items    = $invoicing->form_elements->convert_checkout_items($invoice->cart_details, $invoice);
 
 	ob_start();
 	echo "<form class='wpinv_payment_form'>";
-	do_action( 'wpinv_payment_form_top' );
+	do_action('wpinv_payment_form_top');
     echo "<input type='hidden' name='form_id' value='$form'/>";
     echo "<input type='hidden' name='invoice_id' value='$invoice_id'/>";
-	wp_nonce_field( 'wpinv_payment_form', 'wpinv_payment_form' );
-	wp_nonce_field( 'vat_validation', '_wpi_nonce' );
+	wp_nonce_field('wpinv_payment_form', 'wpinv_payment_form');
+	wp_nonce_field('vat_validation', '_wpi_nonce');
 
-	foreach ( $elements as $element ) {
-		do_action( 'wpinv_frontend_render_payment_form_element', $element, $items, $form );
-		do_action( "wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form );
+	foreach ($elements as $element) {
+		do_action('wpinv_frontend_render_payment_form_element', $element, $items, $form);
+		do_action("wpinv_frontend_render_payment_form_{$element['type']}", $element, $items, $form);
 	}
 
 	echo "<div class='wpinv_payment_form_errors alert alert-danger d-none'></div>";
-	do_action( 'wpinv_payment_form_bottom' );
+	do_action('wpinv_payment_form_bottom');
 	echo '</form>';
 
 	$content = ob_get_clean();
-	return str_replace( 'sr-only', '', $content );
+	return str_replace('sr-only', '', $content);
 }
 
 /**
  * Helper function to convert item string to array.
  */
-function getpaid_convert_items_to_array( $items ) {
-    $items    = array_filter( array_map( 'trim', explode( ',', $items ) ) );
+function getpaid_convert_items_to_array($items) {
+    $items    = array_filter(array_map('trim', explode(',', $items)));
     $prepared = array();
 
-    foreach ( $items as $item ) {
-        $data = array_map( 'trim', explode( '|', $item ) );
+    foreach ($items as $item) {
+        $data = array_map('trim', explode('|', $item));
 
-        if ( empty( $data[0] ) || ! is_numeric( $data[0] ) ) {
+        if (empty($data[0]) || !is_numeric($data[0])) {
             continue;
         }
 
         $quantity = 1;
-        if ( isset( $data[1] ) && is_numeric( $data[1] ) ) {
+        if (isset($data[1]) && is_numeric($data[1])) {
             $quantity = $data[1];
         }
 
-        $prepared[ $data[0] ] = $quantity;
+        $prepared[$data[0]] = $quantity;
 
     }
 
@@ -2467,13 +2467,13 @@ 
 /**
  * Helper function to convert item array to string.
  */
-function getpaid_convert_items_to_string( $items ) {
+function getpaid_convert_items_to_string($items) {
     $prepared = array();
 
-    foreach ( $items as $item => $quantity ) {
+    foreach ($items as $item => $quantity) {
         $prepared[] = "$item|$quantity";
     }
-    return implode( ',', $prepared );
+    return implode(',', $prepared);
 }
 
 /**
@@ -2481,22 +2481,22 @@ 
  * 
  * Provide a label and one of $form, $items or $invoice.
  */
-function getpaid_get_payment_button( $label, $form = null, $items = null, $invoice = null ) {
-    $label = sanitize_text_field( $label );
+function getpaid_get_payment_button($label, $form = null, $items = null, $invoice = null) {
+    $label = sanitize_text_field($label);
     $nonce = wp_create_nonce('getpaid_ajax_form');
 
-    if ( ! empty( $form ) ) {
-        $form  = esc_attr( $form );
+    if (!empty($form)) {
+        $form = esc_attr($form);
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-form='$form'>$label</button>"; 
     }
 	
-	if ( ! empty( $items ) ) {
-        $items  = esc_attr( $items );
+	if (!empty($items)) {
+        $items = esc_attr($items);
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-item='$items'>$label</button>"; 
     }
     
-    if ( ! empty( $invoice ) ) {
-        $invoice  = esc_attr( $invoice );
+    if (!empty($invoice)) {
+        $invoice = esc_attr($invoice);
         return "<button class='btn btn-primary getpaid-payment-button' type='button' data-nonce='$nonce' data-invoice='$invoice'>$label</button>"; 
     }