(PECL memcached >= 0.1.0)
Memcached::setMultiByKey — Store multiple items on a specific server
Memcached::setMultiByKey() is functionally equivalent to Memcached::setMulti, except that the free-form server_key can be used to map the keys from items to a specific server. This is useful if you need to keep a bunch of related keys on a certain server.
The key identifying the server to store the items on.
An array of key/value pairs to store on the server.
The expiration time, defaults to 0. See Expiration Times for more info.
如果成功则返回 TRUE，失败则返回 FALSE。 Use Memcached::getResultCode if necessary.