Memcached::replaceByKey
(PECL memcached >= 0.1.0)
Memcached::replaceByKey — Replace the item under an existing key on a specific server
說明
public bool Memcached::replaceByKey
( string
$server_key
, string $key
, mixed $value
[, int $expiration
] )
Memcached::replaceByKey() is functionally equivalent to
Memcached::replace(), except that the free-form
server_key can be used to map the
key to a specific server. This is useful if you need
to keep a bunch of related keys on a certain server.
參數
-
server_key -
本鍵名用於識別儲存和讀取值的伺服器。沒有將實際的鍵雜湊到具體的項目，而是在決定與哪一個 memcached 伺服器通信時將其雜湊為伺服器鍵值。這使得關連的項目在單一伺服上被組合起來以提高多重操作的效率。
-
key -
用於儲存值的鍵名。
-
value -
儲存的值。
-
expiration -
到期時間，預設為 0。 更多訊息參見到期時間。
回傳值
如果成功則回傳 TRUE，失敗則回傳 FALSE。
The Memcached::getResultCode() will return
Memcached::RES_NOTSTORED if the key does not exist.
參見
- Memcached::replace() - Replace the item under an existing key
- Memcached::set() - Store an item
- Memcached::add() - Add an item under a new key
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