Wpb flush

Wpb flush

/**
 * DB connection sync (shutdown)
 * Description: Clears any pending MySQL result set on the default connection before other shutdown hooks run, reducing "Commands out of sync" errors from Action Scheduler, WooCommerce batch processing, Jetpack, and cron.
 * Version: 1.0.0
 *
 * @package
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * When a previous query leaves results unconsumed, mysqli can throw "Commands out of sync" on the next query.
 * wpdb::flush() frees the last result and drains multi-query state (see wp-includes/class-wpdb.php).
 * Priority 0 runs before typical shutdown work (e.g. WooCommerce BatchProcessingController at default 10).
 */
add_action(
	'shutdown',
	static function () {
		global $wpdb;
		if ( $wpdb && method_exists( $wpdb, 'flush' ) ) {
			$wpdb->flush();
		}
	},
	0
);