前提：
1、配置各php支持使用memcache；
2、安装配置好memcached服务器，这里假设其地址为172.16.200.11，端口为11211；
一、配置php将会话保存至memcached中
编辑php.ini文件，确保如下两个参数的值分别如下所示：
session.save_handler = memcache
session.save_path = "tcp://172.16.200.11:11211?persistent=1&weight=1&timeout=1&retry_interval=15"
二、测试
新建php页面setsess.php，为客户端设置启用session：
<?php
session_start();
if (!isset($_SESSION['www.amd5.cn'])) {
$_SESSION['www.amd5.cn'] = time();
}
print $_SESSION['www.amd5.cn'];
print "<br><br>";
print "Session ID: " . session_id();
?>
新建php页面showsess.php，获取当前用户的会话ID：
<?php
session_start();
$memcache_obj = new Memcache;
$memcache_obj->connect('172.16.200.11', 11211);
$mysess=session_id();
var_dump($memcache_obj->get($mysess));
$memcache_obj->close();
?>
<?php
// Generating cookies must take place before any HTML.
// Check for existing "SessionId" cookie
$session = $HTTP_COOKIE_VARS["SessionId"];
if ( $session == "" ) {
// Generate time-based unique id.
// Use user's IP address to make more unique.
$session = uniqid ( getenv ( "REMOTE_ADDR" ) );
// Send session id - expires when browser exits
SetCookie ( "SessionId", $session );
}
?>
<HTML>
<HEAD><TITLE>Session Test</TITLE></HEAD>
<BODY> <br> 16 Current session id: <?php echo $session ?>
</BODY></HTML>
