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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Persist Admin notices Dismissal  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Copyright (C) 2016 Collins Agbonghama <http://w3guy.com>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This program is free software: you can redistribute it and/or modify  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * it under the terms of the GNU General Public License as published by  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * the Free Software Foundation, either version 3 of the License, or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * (at your option) any later version.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * This program is distributed in the hope that it will be useful,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * but WITHOUT ANY WARRANTY; without even the implied warranty of  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * GNU General Public License for more details.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * You should have received a copy of the GNU General Public License  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * along with this program.  If not, see <http://www.gnu.org/licenses/>.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package Persist Admin notices Dismissal  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author  Collins Agbonghama  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author  Andy Fragen  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license http://www.gnu.org/licenses GNU General Public License  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @version 1.4.1  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Exit if called directly.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                if ( ! defined( 'ABSPATH' ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	die;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                if ( ! class_exists( 'PAnD' ) ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * Class PAnD  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	class PAnD { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * Init hooks.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public static function init() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			add_action( 'admin_enqueue_scripts', array( __CLASS__, 'load_script' ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			add_action( 'wp_ajax_dismiss_admin_notice', array( __CLASS__, 'dismiss_admin_notice' ) );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * Enqueue javascript and variables.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public static function load_script() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( is_customize_preview() ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				return;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			wp_enqueue_script(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				'dismissible-notices',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				plugins_url( 'dismiss-notice.js', __FILE__ ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				array( 'jquery', 'common' ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				false,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				true  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			wp_localize_script(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				'dismissible-notices',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				'dismissible_notice',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                					'nonce' => wp_create_nonce( 'dismissible-notice' ),  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * Handles Ajax request to persist notices dismissal.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * Uses check_ajax_referer to verify nonce.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public static function dismiss_admin_notice() { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$option_name        = sanitize_text_field( $_POST['option_name'] );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$dismissible_length = sanitize_text_field( $_POST['dismissible_length'] );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( 'forever' != $dismissible_length ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				// If $dismissible_length is not an integer default to 1  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$dismissible_length = ( 0 == absint( $dismissible_length ) ) ? 1 : $dismissible_length;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				$dismissible_length = strtotime( absint( $dismissible_length ) . ' days' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			check_ajax_referer( 'dismissible-notice', 'nonce' );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			self::set_admin_notice_cache( $option_name, $dismissible_length );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			wp_die();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * Is admin notice active?  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * @param string $arg data-dismissible content of notice.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * @return bool  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public static function is_admin_notice_active( $arg ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$array       = explode( '-', $arg );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$length      = array_pop( $array );  | 
            
                            
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                			$option_name = implode( '-', $array );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$db_record   = self::get_admin_notice_cache( $option_name );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( 'forever' == $db_record ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			} elseif ( absint( $db_record ) >= time() ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			} else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				return true;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * Returns admin notice cached timeout.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * @access public  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * @param string|bool $id admin notice name or false.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 * @return array|bool The timeout. False if expired.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		public static function get_admin_notice_cache( $id = false ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			if ( ! $id ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                				return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$cache_key = 'pand-' . md5( $id );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$timeout   = get_site_option( $cache_key );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$timeout   = 'forever' === $timeout ? time() + 60 : $timeout;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    132
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    133
                 | 
                                    
                                                     | 
                
                 | 
                			if ( empty( $timeout ) || time() > $timeout ) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    134
                 | 
                                    
                                                     | 
                
                 | 
                				return false;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    135
                 | 
                                    
                                                     | 
                
                 | 
                			}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    136
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    137
                 | 
                                    
                                                     | 
                
                 | 
                			return $timeout;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    138
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    139
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    140
                 | 
                                    
                                                     | 
                
                 | 
                		/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    141
                 | 
                                    
                                                     | 
                
                 | 
                		 * Sets admin notice timeout in site option.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    142
                 | 
                                    
                                                     | 
                
                 | 
                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    143
                 | 
                                    
                                                     | 
                
                 | 
                		 * @access public  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    144
                 | 
                                    
                                                     | 
                
                 | 
                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    145
                 | 
                                    
                                                     | 
                
                 | 
                		 * @param string      $id       Data Identifier.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    146
                 | 
                                    
                                                     | 
                
                 | 
                		 * @param string|bool $timeout  Timeout for admin notice.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    147
                 | 
                                    
                                                     | 
                
                 | 
                		 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    148
                 | 
                                    
                                                     | 
                
                 | 
                		 * @return bool  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    149
                 | 
                                    
                                                     | 
                
                 | 
                		 */  | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    150
                 | 
                                    
                                                     | 
                
                 | 
                		public static function set_admin_notice_cache( $id, $timeout ) { | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    151
                 | 
                                    
                                                     | 
                
                 | 
                			$cache_key = 'pand-' . md5( $id );  | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    152
                 | 
                                    
                                                     | 
                
                 | 
                			update_site_option( $cache_key, $timeout );  | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    153
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    154
                 | 
                                    
                                                     | 
                
                 | 
                			return true;  | 
            
            
                                                                        
                            
            
                                    
            
            
                | 
                    155
                 | 
                                    
                                                     | 
                
                 | 
                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    156
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    157
                 | 
                                    
                                                     | 
                
                 | 
                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
                | 
                    158
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
                | 
                    159
                 | 
                                    
                                                     | 
                
                 | 
                }  | 
            
            
                                                        
            
                                    
            
            
                | 
                    160
                 | 
                                    
                                                     | 
                
                 | 
                 | 
            
            
                        
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.