| 1 |  |  | <?php | 
                            
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                | 2 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  |  * Give Form Widget | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  |  * @package     WordImpress | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  * @subpackage  Admin/Forms | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  * @copyright   Copyright (c) 2016, WordImpress | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  |  * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  * @since       1.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | // Exit if accessed directly | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | defined( 'ABSPATH' ) or exit; | 
                            
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                | 14 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |  * Give Form widget | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |  * @since 1.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  | class Give_Forms_Widget extends WP_Widget{ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  | 	 * The widget class name | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  | 	 * @var string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  | 	protected $self; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  | 	 * Instantiate the class | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  | 	public function __construct(){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  | 		$this->self = get_class( $this ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  | 		parent::__construct( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  | 			strtolower( $this->self ), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  | 			esc_html__( 'Give - Donation Form', 'give' ), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  | 			array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  | 				'description' => esc_html__( 'Display a Give Donation Form in your theme\'s widget powered sidebar.', 'give' ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  | 			) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  | 		); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  | 		add_action( 'widgets_init',          array( $this, 'widget_init' ) ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  | 		add_action( 'admin_enqueue_scripts', array( $this, 'admin_widget_scripts' ) ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  | 	 * Load widget assets only on the widget page | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  | 	 * @param string $hook | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  | 	 * @return void | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  | 	public function admin_widget_scripts( $hook ){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  | 		// Directories of assets | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  | 		$js_dir     = GIVE_PLUGIN_URL . 'assets/js/admin/'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  | 		$js_plugins = GIVE_PLUGIN_URL . 'assets/js/plugins/'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  | 		$css_dir    = GIVE_PLUGIN_URL . 'assets/css/'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  | 		// Use minified libraries if SCRIPT_DEBUG is turned off | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  | 		$suffix = ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '' : '.min'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  | 		// Widget Script | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  | 		if ( $hook == 'widgets.php' ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  | 			wp_enqueue_style( 'give-qtip-css', $css_dir . 'jquery.qtip' . $suffix . '.css' ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  | 			wp_enqueue_script( 'give-qtip', $js_plugins . 'jquery.qtip' . $suffix . '.js', array( 'jquery' ), GIVE_VERSION ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  | 			wp_enqueue_script( 'give-admin-widgets-scripts', $js_dir . 'admin-widgets' . $suffix . '.js', array( 'jquery' ), GIVE_VERSION, false ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  | 	 * Echo the widget content. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  | 	 * @param array $args     Display arguments including before_title, after_title, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  | 	 *                        before_widget, and after_widget. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  | 	 * @param array $instance The settings for the particular instance of the widget. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  | 	public function widget( $args, $instance ){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  | 		$title = !empty( $instance['title'] ) ? $instance['title'] : ''; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  | 		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  | 		// If user set float labels to global then check global float label setting and update donation form widget accordingly. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  | 		if( ( 'global' === $instance['float_labels'] ) ) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  | 			$instance['float_labels'] = ( 'on' === give_get_option( 'enable_floatlabels', '' ) ) ? 'enabled' : 'disabled'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  | 		} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  | 		echo $args['before_widget']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  | 		do_action( 'give_before_forms_widget' ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  | 		echo $title ? $args['before_title'] . $title . $args['after_title'] : ''; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  | 		give_get_donation_form( $instance ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  | 		echo $args['after_widget']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  | 		do_action( 'give_after_forms_widget' ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  | 	 * Output the settings update form. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  | 	 * @param array $instance Current settings. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  | 	 * @return string | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 109 |  |  | 	 */ | 
            
                                                                        
                            
            
                                    
            
            
                | 110 |  |  | 	public function form( $instance ){ | 
            
                                                                        
                            
            
                                    
            
            
                | 111 |  |  | 		$defaults = array( | 
            
                                                                        
                            
            
                                    
            
            
                | 112 |  |  | 			'title'         => '', | 
            
                                                                        
                            
            
                                    
            
            
                | 113 |  |  | 			'id'            => '', | 
            
                                                                        
                            
            
                                    
            
            
                | 114 |  |  | 			'float_labels'  => 'global', | 
            
                                                                        
                            
            
                                    
            
            
                | 115 |  |  | 			'display_style' => 'modal', | 
            
                                                                        
                            
            
                                    
            
            
                | 116 |  |  | 		); | 
            
                                                                        
                            
            
                                    
            
            
                | 117 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 118 |  |  | 		$instance = wp_parse_args( (array) $instance, $defaults ); | 
            
                                                                        
                            
            
                                    
            
            
                | 119 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 120 |  |  | 		// Backward compatibility: Set float labels as default if, it was set as empty previous. | 
            
                                                                        
                            
            
                                    
            
            
                | 121 |  |  | 		$instance['float_labels'] = empty( $instance['float_labels'] ) ? 'global' : $instance['float_labels']; | 
            
                                                                        
                            
            
                                    
            
            
                | 122 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 123 |  |  | 		// Query Give Forms | 
            
                                                                        
                            
            
                                    
            
            
                | 124 |  |  | 		$args = array( | 
            
                                                                        
                            
            
                                    
            
            
                | 125 |  |  | 			'post_type'      => 'give_forms', | 
            
                                                                        
                            
            
                                    
            
            
                | 126 |  |  | 			'posts_per_page' => - 1, | 
            
                                                                        
                            
            
                                    
            
            
                | 127 |  |  | 			'post_status'    => 'publish', | 
            
                                                                        
                            
            
                                    
            
            
                | 128 |  |  | 		); | 
            
                                                                        
                            
            
                                    
            
            
                | 129 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 130 |  |  | 		$give_forms = get_posts( $args ); | 
            
                                                                        
                            
            
                                    
            
            
                | 131 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 132 |  |  | 		// Widget: Title | 
            
                                                                        
                            
            
                                    
            
            
                | 133 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 134 |  |  | 		?><p> | 
            
                                                                        
                            
            
                                    
            
            
                | 135 |  |  | 			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php esc_html_e( 'Title:', 'give' ); ?></label> | 
            
                                                                        
                            
            
                                    
            
            
                | 136 |  |  | 			<input type="text" class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php esc_attr_e( $instance['title'] ); ?>" /><br> | 
            
                                                                        
                            
            
                                    
            
            
                | 137 |  |  | 			<small class="give-field-description"><?php esc_html_e( 'Leave blank to hide the widget title.', 'give' ); ?></small> | 
            
                                                                        
                            
            
                                    
            
            
                | 138 |  |  | 		</p><?php | 
            
                                                                        
                            
            
                                    
            
            
                | 139 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 140 |  |  | 		// Widget: Give Form | 
            
                                                                        
                            
            
                                    
            
            
                | 141 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 142 |  |  | 		?><p> | 
            
                                                                        
                            
            
                                    
            
            
                | 143 |  |  | 			<label for="<?php echo esc_attr( $this->get_field_id( 'id' ) ); ?>"><?php | 
            
                                                                        
                            
            
                                    
            
            
                | 144 |  |  | 				printf( | 
            
                                                                        
                            
            
                                    
            
            
                | 145 |  |  | 					/* translators: %s: form singular label */ | 
            
                                                                        
                            
            
                                    
            
            
                | 146 |  |  | 					esc_html__( 'Give %s:', 'give' ), | 
            
                                                                        
                            
            
                                    
            
            
                | 147 |  |  | 					give_get_forms_label_singular() | 
            
                                                                        
                            
            
                                    
            
            
                | 148 |  |  | 				); | 
            
                                                                        
                            
            
                                    
            
            
                | 149 |  |  | 			?></label> | 
            
                                                                        
                            
            
                                    
            
            
                | 150 |  |  | 			<select class="widefat" name="<?php echo esc_attr( $this->get_field_name( 'id' ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( 'id' ) ); ?>"> | 
            
                                                                        
                            
            
                                    
            
            
                | 151 |  |  | 				<option value="current"><?php esc_html_e( '— Select —', 'give' ); ?></option> | 
            
                                                                        
                            
            
                                    
            
            
                | 152 |  |  | 				<?php foreach ( $give_forms as $give_form ) { ?> | 
            
                                                                        
                            
            
                                    
            
            
                | 153 |  |  | 					<option <?php selected( absint( $instance['id'] ), $give_form->ID ); ?> value="<?php echo esc_attr( $give_form->ID ); ?>"><?php echo $give_form->post_title; ?></option> | 
            
                                                                        
                            
            
                                    
            
            
                | 154 |  |  | 				<?php } ?> | 
            
                                                                        
                            
            
                                    
            
            
                | 155 |  |  | 			</select><br> | 
            
                                                                        
                            
            
                                    
            
            
                | 156 |  |  | 			<small class="give-field-description"><?php esc_html_e( 'Select a Give Form to embed in this widget.', 'give' ); ?></small> | 
            
                                                                        
                            
            
                                    
            
            
                | 157 |  |  | 		</p> | 
            
                                                                        
                            
            
                                    
            
            
                | 158 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 159 |  |  | 		<?php // Widget: Display Style ?> | 
            
                                                                        
                            
            
                                    
            
            
                | 160 |  |  | 		<p> | 
            
                                                                        
                            
            
                                    
            
            
                | 161 |  |  | 			<label for="<?php echo esc_attr( $this->get_field_id( 'display_style' ) ); ?>"><?php esc_html_e( 'Display style:', 'give' ); ?></label><br> | 
            
                                                                        
                            
            
                                    
            
            
                | 162 |  |  | 			<label for="<?php echo $this->get_field_id( 'display_style' ); ?>-onpage"><input type="radio" class="widefat" id="<?php echo $this->get_field_id( 'display_style' ); ?>-onpage" name="<?php echo $this->get_field_name( 'display_style' ); ?>" value="onpage" <?php checked( $instance['display_style'], 'onpage' ); ?>> <?php echo esc_html__( 'All Fields', 'give' ); ?></label> | 
            
                                                                        
                            
            
                                    
            
            
                | 163 |  |  | 			  <label for="<?php echo $this->get_field_id( 'display_style' ); ?>-reveal"><input type="radio" class="widefat" id="<?php echo $this->get_field_id( 'display_style' ); ?>-reveal" name="<?php echo $this->get_field_name( 'display_style' ); ?>" value="reveal" <?php checked( $instance['display_style'], 'reveal' ); ?>> <?php echo esc_html__( 'Reveal', 'give' ); ?></label> | 
            
                                                                        
                            
            
                                    
            
            
                | 164 |  |  | 			  <label for="<?php echo $this->get_field_id( 'display_style' ); ?>-modal"><input type="radio" class="widefat" id="<?php echo $this->get_field_id( 'display_style' ); ?>-modal" name="<?php echo $this->get_field_name( 'display_style' ); ?>" value="modal" <?php checked( $instance['display_style'], 'modal' ); ?>> <?php echo esc_html__( 'Modal', 'give' ); ?></label><br> | 
            
                                                                        
                            
            
                                    
            
            
                | 165 |  |  | 			 <small class="give-field-description"> | 
            
                                                                        
                            
            
                                    
            
            
                | 166 |  |  | 				<?php echo esc_html__( 'Select a Give Form style.', 'give' ); ?> | 
            
                                                                        
                            
            
                                    
            
            
                | 167 |  |  | 			</small> | 
            
                                                                        
                            
            
                                    
            
            
                | 168 |  |  | 		</p> | 
            
                                                                        
                            
            
                                    
            
            
                | 169 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 170 |  |  | 		<?php // Widget: Floating Labels ?> | 
            
                                                                        
                            
            
                                    
            
            
                | 171 |  |  | 		<p> | 
            
                                                                        
                            
            
                                    
            
            
                | 172 |  |  | 			<label for="<?php echo esc_attr( $this->get_field_id( 'float_labels' ) ); ?>"><?php esc_html_e( 'Floating Labels (optional):', 'give' ); ?></label><br> | 
            
                                                                        
                            
            
                                    
            
            
                | 173 |  |  | 			<label for="<?php echo $this->get_field_id( 'float_labels' ); ?>-global"><input type="radio" class="widefat" id="<?php echo $this->get_field_id( 'float_labels' ); ?>-global" name="<?php echo $this->get_field_name( 'float_labels' ); ?>" value="global" <?php checked( $instance['float_labels'], 'global' ); ?>> <?php echo esc_html__( 'Global Options', 'give' ); ?></label> | 
            
                                                                        
                            
            
                                    
            
            
                | 174 |  |  | 			  <label for="<?php echo $this->get_field_id( 'float_labels' ); ?>-enabled"><input type="radio" class="widefat" id="<?php echo $this->get_field_id( 'float_labels' ); ?>-enabled" name="<?php echo $this->get_field_name( 'float_labels' ); ?>" value="enabled" <?php checked( $instance['float_labels'], 'enabled' ); ?>> <?php echo esc_html__( 'Yes', 'give' ); ?></label> | 
            
                                                                        
                            
            
                                    
            
            
                | 175 |  |  | 			  <label for="<?php echo $this->get_field_id( 'float_labels' ); ?>-disabled"><input type="radio" class="widefat" id="<?php echo $this->get_field_id( 'float_labels' ); ?>-disabled" name="<?php echo $this->get_field_name( 'float_labels' ); ?>" value="disabled" <?php checked( $instance['float_labels'], 'disabled' ); ?>> <?php echo esc_html__( 'No', 'give' ); ?></label><br> | 
            
                                                                        
                            
            
                                    
            
            
                | 176 |  |  | 			<small class="give-field-description"> | 
            
                                                                        
                            
            
                                    
            
            
                | 177 |  |  | 				<?php | 
            
                                                                        
                            
            
                                    
            
            
                | 178 |  |  | 				printf( | 
            
                                                                        
                            
            
                                    
            
            
                | 179 |  |  | 					/* translators: %s: https://givewp.com/documentation/core/give-forms/creating-give-forms/#floating-labels */ | 
            
                                                                        
                            
            
                                    
            
            
                | 180 |  |  | 					__( 'Override the <a href="%s" target="_blank">floating labels</a> setting for this Give form.', 'give' ), | 
            
                                                                        
                            
            
                                    
            
            
                | 181 |  |  | 					esc_url( 'https://givewp.com/documentation/core/give-forms/creating-give-forms/#floating-labels' ) | 
            
                                                                        
                            
            
                                    
            
            
                | 182 |  |  | 				); | 
            
                                                                        
                            
            
                                    
            
            
                | 183 |  |  | 			?></small> | 
            
                                                                        
                            
            
                                    
            
            
                | 184 |  |  | 		</p><?php | 
            
                                                                        
                            
            
                                    
            
            
                | 185 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  | 	 * Register the widget | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  | 	 * @return void | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  | 	function widget_init(){ | 
                            
                    |  |  |  | 
                                                                                        
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                | 193 |  |  | 		register_widget( $this->self ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  | 	 * Update the widget | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  | 	 * @param array $new_instance | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  | 	 * @param array $old_instance | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  | 	 * @return array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  | 	public function update( $new_instance, $old_instance ){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  | 		$this->flush_widget_cache(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  | 		return $new_instance; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  | 	/** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  | 	 * Flush widget cache | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 |  |  | 	 * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 213 |  |  | 	 * @return void | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 |  |  | 	 */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 |  |  | 	public function flush_widget_cache(){ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  | 		wp_cache_delete( $this->self, 'widget' ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 |  |  | 	} | 
            
                                                                                                            
                            
            
                                    
            
            
                | 218 |  |  | } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 |  |  |  | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 220 |  |  | new Give_Forms_Widget; | 
            
                                                        
            
                                    
            
            
                | 221 |  |  |  | 
            
                        
The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.