Memcached::prependByKey

(PECL memcached >= 0.1.0)

Memcached::prependByKey — Prepend data to an existing item on a specific server

说明

public Memcached::prependByKey ( string $server_key , string $key , string $value ) : bool

除了可以使用server_key自由的将key映射到指定服务器外， Memcached::prependByKey()在功能上等同于Memcached::prepend()。 (译注: 关于*ByKey系列方法及$server_key的工作原理请参照addByKey方法文档)

参数

server_key

本键名用于识别储存和读取值的服务器。没有将实际的键名散列到具体的项目，而是在决定与哪一个 memcached 服务器通信时将其散列为服务器键名。这使得关联的项目在单一的服务上被组合起来以提高多重操作的效率。

key

要向前追加数据的元素的key。

value

要追加的字符串。

返回值

成功时返回 TRUE， 或者在失败时返回 FALSE。 如果key不存在，Memcached::getResultCode()返回Memcached::RES_NOTSTORED。

参见

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