安装环境：CentOS 6.5

php的扩展memcache，不支持cas，所以我们要装memcached扩展，memcached扩展是基于libmemcached，所以要先安装libmemcached

一、下载软件

1、libmemcached下载地址：https://launchpad.net/libmemcached/+download

（https://launchpadlibrarian.net/165454254/libmemcached-1.0.18.tar.gz）

文件：libmemcached-1.0.18.tar.gz

2、php-memcached下载地址：http://pecl.php.net/package/memcached

（http://pecl.php.net/get/memcached-2.2.0.tgz）

文件：memcached-2.2.0.tgz

PHP7请下载：

git clone https://github.com/php-memcached-dev/php-memcached memcached

二、安装libmemcached

[root@localhost src]# tar zxvf libmemcached-1.0.18.tar.gz

[root@localhost src]# cd libmemcached-1.0.18

[root@localhost libmemcached-1.0.18]# ./configure --prefix=/usr/local/libmemcached --with-memcached

[root@localhost libmemcached-1.0.18]# make

[root@localhost libmemcached-1.0.18]# make install

三、安装php-memcached

[root@localhost src]# tar zxvf memcached-2.2.0.tgz

[root@localhost src]# cd memcached-2.2.0

[root@localhost memcached-2.2.0]# /usr/local/php/bin/phpize

Configuring for:

PHP Api Version: 20131106

Zend Module Api No: 20131226

Zend Extension Api No: 220131226

[root@localhost memcached-2.2.0]# ./configure --enable-memcached --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/local/libmemcached --disable-memcached-sasl

[root@localhost memcached-2.2.0]# make

[root@localhost memcached-2.2.0]# make install

Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-zts-20131226/

[root@localhost memcached-2.2.0]# ll /usr/local/php/lib/php/extensions/no-debug-zts-20131226/

total 2140

-rwxr-xr-x. 1 root root 325608 Dec 30 15:59 memcached.so

-rwxr-xr-x. 1 root root 453766 Dec 30 17:44 memcache.so

-rwxr-xr-x. 1 root root 540834 Dec 19 15:38 opcache.so

-rwxr-xr-x. 1 root root 861055 Dec 30 16:47 redis.so

[root@localhost memcached-2.2.0]# vim /usr/local/php/lib/php.ini

加上extension=memcached.so

重启php

查看phpinfo可以看到支持了