把ssession写到Memcache中

1、把session写到Memcache中的类：memsession.class.php

<?php
class MemSession {
private static $handler=null;
private static $lifetime=null;
private static $time = null;
const NS='session_';

private static function init($handler){
self::$handler=$handler;
self::$lifetime=ini_get('session.gc_maxlifetime');

self::$time=time();
}

public static function start(Memcache $memcache){
self::init($memcache);

session_set_save_handler(
array(__CLASS__, 'open'),
array(__CLASS__, 'close'),
array(__CLASS__, 'read'),
array(__CLASS__, 'write'),
array(__CLASS__, 'destroy'),
array(__CLASS__, 'gc')
);
session_start();
}

public static function open($path, $name){
return true;
}

public static function close(){
return true;
}

public static function read($PHPSESSID){
$out=self::$handler->get(self::session_key($PHPSESSID));

if($out===false || $out == null)
return '';

return $out;
}

public static function write($PHPSESSID, $data){

$method=$data ? 'set' : 'replace';

return self::$handler->$method(self::session_key($PHPSESSID), $data, MEMCACHE_COMPRESSED, self::$lifetime);
}

public static function destroy($PHPSESSID){
return self::$handler->delete(self::session_key($PHPSESSID));
}

public static function gc($lifetime){
return true;
}

private static function session_key($PHPSESSID){
$session_key=self::NS.$PHPSESSID;

return $session_key;
}
}

$memcache=new Memcache;

$memcache->connect("localhost", 11211) or die("could not connect!");

MemSession::start($memcache);
?>

2、session值定义页面：one.php

<?php
include "session.class.php";

$_SESSION["isLogin3"]=1;
$_SESSION["username"]="admin";
$_SESSION["uid"]=333;

echo session_name().'='.session_id().'<br>';
?>

3、从另外页面取值的页面：two.php

<?php
include "session.class.php";

print_r($_SESSION);
echo '<br>';

echo session_name().'='.session_id().'<br>';
?>

4、销毁页面：three.php

<?php
include "session.class.php";

$_SESSION=array();

if(isset($_COOKIE[session_name()])){
setCookie(session_name(), '', time()-100, '/');
}

session_destroy();

echo session_name().'='.session_id().'<br>';
?>

5、把Memcache中值取出来的：items.php

<?php
        $mem=new Memcache;
	$host="localhost";
	$port=11211;
	$mem->connect($host,$port);

	$items=$mem->getExtendedStats("items");

        $items=$items["$host:$port"]['items'];

	print_r($items);

	foreach($items as $value){
		foreach($value as $item){
			$number=$item["number"];

			$arr=$mem->getExtendedStats("cachedump",$number,0);

			print_r($arr);

			$line=$arr["$host:$port"];

			if( is_array($line) && count($line)>0){

				foreach($line as $key=>$value){

					echo $key.'=>';

					print_r($mem->get($key));

					echo "<br>";
            			 }
			}
		}
    	}