php连接memcached缓存服务器的客户端有两个，一个是memcache是比较底层的开发库，memcached是比较新的开发库，php安装这两个扩展中的任意一个后就可以在编写php代码时使用的memcached缓存数据，达到缓存php执行的结果

1、安装memcache
tar -zxvfmemcache-2.2.7.tgz
cdmemcache-2.2.7
/usr/local/php/bin/phpize
./configure –with-php-config=/usr/local/php/bin/php-config
make && make install
安装成功后会有如下类似提示
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/
在/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/ 该目录下会生成memcache.so
编辑 php.ini添加如下
extension = /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/memcache.so
重启php-fpm
查看是否已经加载memcache模块

2、安装memcached
由于memcached是基于libmemcached开发的因此要先安装libmemcached

安装libmemcached要安装gcc44 gcc44-c++
yum install gcc*
export CC="gcc44"
export CXX="g++44"

tar -zxvflibmemcached-1.0.18.tar.gz
cdlibmemcached-1.0.18
./configure –prefix=/usr/local/libmemcached
make && make install

tar -zxvfmemcached-2.2.0.tgz
cdmemcached-2.2.0
/usr/local/php/bin
./configure –with-php-config=/usr/local/php/bin/php-config \
–with-libmemcached-dir=/usr/local/libmemcached/
make && make install
安装完成后也有类似memcache的提示
在/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525 路径下会出现memcached.so
编辑 php.ini添加如下
extension =/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/memcached
重启php-fpm查看php是否支持了memcached