/**
* 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;
}