(PECL memcached >= 0.1.0)
Memcached::deleteByKey — Delete an item from a specific server
Memcached::deleteByKey() is functionally equivalent to Memcached::delete, except that the free-form server_key can be used to map the key to a specific server.
값을 저장할 서버를 인식하는 키.
The key to be deleted.
The amount of time the server will wait to delete the item. Defaults to 0.
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다. The Memcached::getResultCode will return Memcached::RES_NOTFOUND if the key does not exist.