1、下载libmemcached库 地址在https://code.launchpad.net/libmemcached
wget https://launchpad.net/libmemcached/1.0/1.0.18/+do...
2、下载php memcached扩展，地址在http://pecl.php.net/package/memcached
wget http://pecl.php.net/get/memcached-2.2.0.tgz
或者用pecl下载：
pecl download memcached
3、解压
[root@localhost solf]# tar zxvf libmemcached-1.0.18.tar.gz
[root@localhost solf]# tar zxvf memcached-2.2.0.tgz
4、安装 libmemcached
[root@localhost libmemcached-1.0.18]# ./configure --prefix=/usr/local/libmemcached --with-memcached
[root@localhost libmemcached-1.0.18]# make && make install
5、安装PHPmemcached扩展
运行phpize命令生成configure配置文件
[root@localhost memcached-2.2.0]# phpize
安装，因为机子上可能没有sasl，这里暂时不启用，加上参数--disable-memcached-sasl，否则--enable-sasl
[root@localhost memcached-2.2.0]# ./configure --enable-memcached --with-libmemcached-dir=/usr/local/libmemcached/ --prefix=/usr/local/phpmemcached --with-memcached --disable-memcached-sasl
make && make install
到些安装完成
6、配置php，加载memcahed扩展
extension=memcached.so
每次安装都蛋疼的找不到一个libmemcached的地址。。备注下。。
