PHP Fatal error: Class 'Memcache' not found

[error] [client 192.168.10.254] PHP Fatal error: Class ‘Memcache’ not found in /web/framework/caching/CMemCache.php on line 111

help?

为什么呀!怎么办呀!

Look at your phpinfo(). Do you have the PHP memcache extension installed?

need memcache extension~php.ini。顶楼上

真的没有安装memcache extension ,因为我有三台服务器,其中一台没有安装,故出错了!