Detailed explanation of how to implement distributed memcache in PHP to set up web cluster session synchronization

This article mainly introduces the method of PHP to implement distributed memcache to set up web cluster session synchronization. It analyzes the related operation skills and precautions of PHP setting up and using memcache to achieve web cluster session synchronization in the form of examples. Friends in need can refer to it. Next

The example in this article describes how PHP implements distributed memcache to set up web cluster session synchronization.

PHP's session defaults to file storage:

session.save_handler = files
session.save_path = "/var/lib/php/session"

As a web cluster, when session synchronization is required, the session is stored in distributed memcache. It is a good way to achieve shared synchronization

Method:

##Type 1:

vi /etc/php.ini

session.save_handler = memcache
session.save_path = "tcp://192.168.20.193:11211,tcp://192.168.20.194:11211"

Type 2:

Use the ini_set function in the php file for configuration , suitable for virtual hosts that cannot modify configuration files

<?php
....
ini_set("session.save_handler", "memcache");
ini_set("session.save_path", "tcp://192.168.20.193:11211,tcp://192.168.20.194:11211");
....
?>

Restart the web server

service httpd restart

Check login.php

<?php
session_start();
$_SESSION[&#39;login_time&#39;] = time();
$_SESSION[&#39;username&#39;] = &#39;test2&#39;;
$token=session_id();
echo $token;
//memache实现
$mem = new Memcache();
$mem->addServer(&#39;192.168.20.193&#39;,11211);
$mem->addServer(&#39;192.168.20.194&#39;,11211);
/*
//memached实现
$mem = new Memcached();
$servers = array(
 array(&#39;192.168.20.193&#39;, 11211, 33),
 array(&#39;192.168.20.194&#39;, 11211, 67)
);
$mem->addServers($servers);
*/
echo &#39;<hr>&#39;;
print_r($mem->get($token));
?>
<p>
<a href="http://192.168.20.194/user.php?token=<?php echo $token;?>" rel="external nofollow" target="_balnk">跳转到194网站的个人中心</a>
</p>

## in phpinfo

##test

192.168.20.193 user.php in #192.168.20.194

<?php
$mem = new Memcache();
$mem->addServer(&#39;192.168.20.193&#39;,11211);
$mem->addServer(&#39;192.168.20.194&#39;,11211);
$token=$_GET[&#39;token&#39;];//获取传过来的token
print_r($mem->get($token));
?>
<p>
<a href="http://192.168.20.193/user.php?token=<?php echo $token;?>" rel="external nofollow" target="_balnk">返回193网站的个人中心</a>
</p>

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