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✏️ Editing: transient-cleanup.php

<?php
/*
Adapted from Purge Transients by Seebz
https://github.com/Seebz/Snippets/tree/master/Wordpress/plugins/purge-transients
*/
if ( ! function_exists( 'jp_purge_transients' ) ) {

/**
	 * Jetpack Purge Transients.
	 *
	 * @access public
	 * @param string $older_than (default: '1 hour') Older Than.
	 * @return void
	 */
	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 = $wpdb->prepare( "
		SELECT REPLACE(option_name, '_transient_timeout_jpp_', '') AS transient_name
		FROM {$wpdb->options}
		WHERE option_name LIKE '\_transient\_timeout\_jpp\__%%'
		AND option_value < %d
		", $older_than_time );
		$transients = $wpdb->get_col( $sql );
		$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' ) );
			$delete_sql = "DELETE FROM {$wpdb->options} WHERE option_name IN ($option_names_string)";
			$delete_sql = call_user_func_array( array( $wpdb, 'prepare' ), array_merge( array( $delete_sql ), $options_names ) );
			$result = $wpdb->query( $delete_sql );
			if ( ! $result ) {
				return false;
			}
		}
		return;
	}
}

/**
 * Jetpack Purge Transients Activation.
 *
 * @access public
 * @return void
 */
function jp_purge_transients_activation() {
	if ( ! wp_next_scheduled( 'jp_purge_transients_cron' ) ) {
		wp_schedule_event( time(), 'daily', 'jp_purge_transients_cron' );
	}
}
add_action( 'admin_init', 'jp_purge_transients_activation' );
add_action( 'jp_purge_transients_cron', 'jp_purge_transients' );

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