自动加载类文件时发生错误，类名【Memcached】，文件：【/newsite/3180/pootcms/shoubiaoweixiu.cn/core/basic/Memcached.php】

Fatal error: Class 'Memcached' not found in /newsite/3180/pootcms/shoubiaoweixiu.cn/core/cache/Memcache.php on line 42