View file File name : class-transient-cleanup.php Content :<?php /** * Adapted from Purge Transients by Seebz * https://github.com/Seebz/Snippets/tree/master/Wordpress/plugins/purge-transients * * @package automattic/jetpack-waf */ namespace Automattic\Jetpack\Waf\Brute_Force_Protection; /** * Transient Cleanup class. */ class Brute_Force_Protection_Transient_Cleanup { /** * Jetpack Purge Transients. * * @access public * @param string $older_than (default: '1 hour') Older Than. */ public static function jp_purge_transients( $older_than = '1 hour' ) { global $wpdb; $older_than_time = strtotime( '-' . $older_than ); if ( $older_than_time > time() || $older_than_time < 1 ) { return false; } $sql = $wpdb->prepare( // phpcs:ignore WordPress.DB.PreparedSQLPlaceholders.LikeWildcardsInQuery "SELECT REPLACE(option_name, '_transient_timeout_jpp_', '') AS transient_name FROM {$wpdb->options} WHERE option_name LIKE '\_transient\_timeout\_jpp\__%%' AND option_value < %d", $older_than_time ); $transients = $wpdb->get_col( $sql ); // phpcs:ignore WordPress.DB -- $sql is prepared above. $options_names = array(); foreach ( $transients as $transient ) { $options_names[] = '_transient_jpp_' . $transient; $options_names[] = '_transient_timeout_jpp_' . $transient; } if ( $options_names ) { $option_names_string = implode( ', ', array_fill( 0, count( $options_names ), '%s' ) ); $result = $wpdb->query( // phpcs:ignore WordPress.DB.DirectDatabaseQuery $wpdb->prepare( "DELETE FROM {$wpdb->options} WHERE option_name IN ($option_names_string)", // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared,WordPress.DB.PreparedSQLPlaceholders.UnfinishedPrepare -- the placeholders are set above. $options_names ) ); if ( ! $result ) { return false; } } } /** * Jetpack Purge Transients Activation. * * @access public * @return void */ public static function jp_purge_transients_activation() { if ( ! wp_next_scheduled( 'jp_purge_transients_cron' ) ) { wp_schedule_event( time(), 'daily', 'jp_purge_transients_cron' ); } } }