public static function flush($flush_persistent = false)
{
global $wpdb;
self::$_cache = array();
if (false === $flush_persistent) {
return true;
}
if (is_multisite()) {
$sql = "\r\n DELETE FROM {$wpdb->sitemeta}\r\n WHERE meta_key LIKE '_site_transient_timeout_GFCache_%' OR\r\n meta_key LIKE '_site_transient_GFCache_%'\r\n ";
} else {
$sql = "\r\n DELETE FROM {$wpdb->options}\r\n WHERE option_name LIKE '_transient_timeout_GFCache_%' OR\r\n option_name LIKE '_transient_GFCache_%'\r\n ";
}
$rows_deleted = $wpdb->query($sql);
$success = $rows_deleted !== false ? true : false;
return $success;
}
