/** * 移除指定键值的过期时间 * @param string $key 键名 * @return boolean 是否成功 */ public function persist($key) { if ($this->driver->checkDriver()) { return $this->driver->persist($key); } if ($this->driver->isFallback() && $this->type !== self::$config['fallback']) { return $this->driver->backup()->persist($key); } return false; }