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php下session入memcached

Jun 23, 2016 pm 01:23 PM


windows7 32位环境下所需软件


一、安装Apache2.4+PHP5.6
Apache2.4配置httpd.conf

参考文章:http://jingyan.baidu.com/article/fcb5aff797ec41edaa4a71c4.html

    ServerRoot "c:/Apache24"
    Listen 8080
    DocumentRoot "c:/Apache24/htdocs"
    
    # php5 support
    LoadModule php5_module c:/php-5.6.15-Win32-VC11-x86/php5apache2_4.dll
    AddType application/x-httpd-php .php .html .htm
    # configure the path to php.ini
    PHPIniDir "c:/php-5.6.15-Win32-VC11-x86"
  
memcache存放超过三十天的数据,0表示永不过期,expire最大是30*3600*24秒
  bool Memcache::add  ( string $key  , mixed  $var  [, int $flag  [, int $expire  ]] )

time()+天数*3600*24即可




memcached无用户名和密码机制,启用防火墙封杀11211端口
只允许本地访问11211端口
    iptables -a input -p tcp -s 127.0.0.1 -dport 11211 -j ACCEPT


二、session入memcached

          //传统的代码
    session_start();
    $_SESSION['name']='天龙八部'; 
    //取出
    $name=$_SESSION['name'];
     echo "name=$name";
    ?>

传统php.ini中配置session存放在文件中

        [Session]
    session.save_handler=files
    session.save_path="c:/windows/temp"

修改php.ini文件,加载php_memcache.dll(版本要与php版本一致,放在php安装目录下的ext目录)

    extension=C:\php-5.6.15-Win32-VC11-x86\ext\php.memcache.dll

    session.save_handler=memcache
    session.save_path="tcp://127.0.0.1:11211"

session入memcache代码
 
        session_start();
    $_SESSION['name']='天龙八部100';
    $_SESSION['city']='beijing';
    
    //如果session数据入mem,那它一定是以session_id为key值进行添加
    //取出
    $name=$_SESSION['name'];
     echo "name=$name";
     echo "sessionid=".session_id();
    ?>

如果不使用memcache php.memcache.dll扩展支持,可以使用memcached_client.php原生函数,只不过效率低


如果管理员不让我们修改php.ini文件,我们如何实现session入memcached功能,我们通过ini_set函数动态修改php.ini的配置,只作用于本页面,别的php页面不受影响,配置文件也不会被修改

    ini_set("session.save_handler","memcache");
    
    ini_set("session.save_path","tcp://127.0.0.1:11211");

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