session 加入redis的实现代码

<?php 
 
ini_set("session.save_handler", "redis"); 
 
ini_set("session.save_path", "tcp://localhost:6379"); 
 
session_start(); 
 
header("Content-type:text/html;charset=utf-8"); 
 
if(isset($_SESSION['view'])){ 
 
  $_SESSION['view'] = $_SESSION['view'] + 1; 
 
}else{ 
 
  $_SESSION['view'] = 1; 
 
} 
 
echo "【view】{$_SESSION['view']}"; 
 
//这里设置session.save_handler方式为redis，session.save_path为redis的地址和端口，设置之后刷新，再回头查看redis，会发现redis中的生成了sessionId，sessionId和浏览器请求的是一样的， 
 
  
 
//也可以使用 
 
Session_set_save_handler(‘open','close',' read',' write',' destory',' gc'); 
 
//用法如下自定义一个Redis_session类 
 
<?php 
 
class RedisSession{ 
 
  private $_redis = array( 
 
    'handler' => null, //数据库连接句柄 
 
    'host' => null,  //redis端口号 
 
    'port' => null, 
 
  ); 
 
  public function __construct($array = array()){ 
 
    isset($array['host'])?$array['host']:"false"; 
 
    isset($array['port'])?$array['host']:"false"; 
 
    $this->_redis = array_merge($this->_redis, $array); 
 
  } 
 
  public function begin(){ 
 
    //设置session处理函数 
 
    session_set_save_handler( 
 
      array($this, 'open'), 
 
      array($this, 'close'), 
 
      array($this, 'read'), 
 
      array($this, 'write'), 
 
      array($this, 'destory'), 
 
      array($this, 'gc') 
 
    ); 
 
  } 
 
  public function open(){ 
 
    $redis = new Redis(); 
 
    $redis->connect($this->_redis['host'], $this->_redis['port']); 
 
    if(!$redis){ 
 
      return false; 
 
    } 
 
  
 
    $this->_redis['handler'] = $redis; 
 
    $this->gc(null); 
 
    return true; 
 
  } 
 
  //关 
 
  public function close(){ 
 
    return $this->_redis['handler']->close(); 
 
  } 
 
  //读 
 
  public function read($session_id){ 
 
    return $this->_redis['handler']->get($session_id); 
 
  } 
 
  //写 
 
  public function write($sessionId, $sessionData){ 
 
    return $this->_redis['handler']->set($sessionId, $sessionData); 
 
  } 
 
  public function destory($sessionId){ 
 
    return $this->_redis['handler']->delete($sessionId) >= 1 ? true : false; 
 
  } 
 
  public function gc(){ 
 
    //获取所有sessionid，让过期的释放掉 
 
    $this->_redis['handler']->keys("*"); 
 
    return true; 
 
  } 
 
} 
 
$ses = new RedisSession(array('host'=>'127.0.0.1','port'=>'6379')); 
 
$ses->begin(); 
 
session_start(); 
 
$_SESSION['name']='zhangsan'; 
 
echo $_SESSION['name'];