1、下载memcache，地址wget http://memcached.googlecode.com/files/memcached-1.4.14.tar.gz
2、解压tar zxf memcached-1.4.14.tar.gz
3、cd memcached-1.4.14
4、./configure --prefix=/opt/memcached-1.4.14
5、make
6、make install
7、下载php扩展包，之前下载的是最新的3.0.6，总是提示失败，最后下载了wget http://pecl.php.net/get/memcache-2.2.6.tgz
8、解压 tar zxf memcache-2.2.6.tgz
9、cd memcache-2.2.6
10、 /opt/lampp/bin/phpize
11、./configure --enable-memcache --with-php-config=/opt/lampp/bin/php-config --with-zlib-dir
12、make
13、make install
14、vi /opt/lampp/etc/php.ini
15、/opt/lampp/lampp restart
测试成功，ok
参考：http://hi.baidu.com/bsbgong/blog/item/d9e08b34b6298051241f1426.html
http://www.centos.bz/2011/11/linux-install-php-memcache/
http://hi.baidu.com/hivemind/item/1f5ca1ba890ad2a7ebba9364