(PECL memcached >= 0.1.0)
表示与一组 memcached 服务器的连接。
$persistent_id
= null
, ?callable $callback
= null
, ?string $connection_str
= null
)$cas_token
,$server_key
,$key
,$value
,$expiration
= 0$server_key
,$key
,$offset
= 1,$initial_value
= 0,$expiry
= 0$server_key
,$key
,$cache_cb
= null
,$get_flags
= 0$server_key
,$keys
,$with_cas
= false
,$value_cb
= null