1.安装 libevent   

     wget https://github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz   

     tar -zxvf libevent-2.0.21-stable.tar.gz  

     进入目录

     ./configure --prefix=/usr/local/libevent

     make

     make install 

 2.安装 memcached   

      wget -c http://memcached.org/files/memcached-1.5.7.tar.gz

      解压并进入目录

      ./configure --with-libevent=/usr/local/libevent  --prefix=/usr/local/memcached

      make

      make install  

 3.启动memcached 

     /usr/local/memcached/bin/memcached -d -m 128 -l 127.0.0.1 -p 11211  

     ps -aux | grep memcached 

 4.开机启动    重启成效   

     vim /etc/rc.local

     /usr/local/memcached/bin/memcached -d -m 128 -l 127.0.0.1 -p 11211

 5.安装  php memcache扩展  

     wget -c https://github.com/websupport-sk/pecl-memcache/archive/php7.zip

     unzip php7.zip 

     cd pecl-memcache-php7/   

     /usr/local/php7/bin/phpize  

     ./configure --with-php-config=/usr/local/php7/bin/php-config   

     make

     make install  

      cd /usr/local/php7/lib/php/extensions/no-debug-non-zts-20151012/

      发现 多了一个 memcache.so   不是 memcached.so   

      vim /usr/local/php7/etc/php.ini 

      extension_dir = "/usr/local/php7/lib/php/extensions/no-debug-non-zts-20151012/"

      extension = memcache.so 

      service php-fpm restart  

      /usr/local/php7/bin/php -m  查看  

      会出现一个 memcache 

      index.php

       session_start();

        if (!isset($_SESSION['TEST'])) {

             $_SESSION['TEST'] = time();

         }

         $_SESSION['TEST3'] = time();

         $_SESSION['name'] = 'liwenkai';

         print $_SESSION['TEST'];

         print "<br><br>";

         print $_SESSION['TEST3'];

         print "<br><br>";

         echo session_id();

     test.php

       session_start();

       $mem = new Memcache();

       $mem->addServer('127.0.0.1',11211);

       var_dump($mem->get(session_id()));