PDO的介绍的文章 

http://www.cnblogs.com/xiaochaohuashengmi/archive/2010/08/12/1797753.html

介绍memcache

 http://tech.idv2.com/2008/07/11/memcached-002/

介绍thinkphp的

http://www.5idev.com/p-thinkphp_module.shtml