(PECL memcache >= 2.1.0)
Memcache::getServerStatus — 用于获取一个服务器的在线/离线状态
$host, int $port = 11211): intMemcache::getServerStatus() 返回一个服务器的在线/离线状态，你也同样可以使用 函数 memcache_get_server_status()。
注意:
这个函数在 memcache 2.1.0 版本加入。
host主机监听地址。
port主机监听端口，默认 11211.
返回一个服务器的状态，0 表示服务器离线，非 0 表示在线。
示例 #1 Memcache::getServerStatus() 示例
<?php
/* OO API */
$memcache = new Memcache;
$memcache->addServer('memcache_host', 11211);
echo $memcache->getServerStatus('memcache_host', 11211);
/* procedural API */
$memcache = memcache_connect('memcache_host', 11211);
echo memcache_get_server_status($memcache, 'memcache_host', 11211);
?>Beware... this method does not actually attempt to connect to the server and port you specify! It is not a health check to tell whether memcached is actually running or not!
It merely returns the server status from the pool, which defaults to TRUE when using addServer( ) with only required arguments.
Try it - stop your memcached and run the sample code above - it will output 1.Note: the result of the function is cached. The cached is not automatically refreshed.
Call MemCache::getExtendedStats() to force a cache-update.