php基于Socket实现多线程开发教程
由于php本身不支持多线程,如果我们想在php实现多线程是不是不可行呢?本教程来讲讲通过php的Socket方式实现php程序的多线程.
通过php的Socket方式实现php程序的多线程,php本身是不支持多线程的,那么如何在php中实现多线程呢?可以想一下,WEB服务器本身都是支持多线程的,每一个访问者,当访问WEB页面的时候,都将调用新的线程,通过这一点我们可以利用WEB服务器自身的线程来解决PHP不支持多线程的问题.
下面给出通过 fsockopen() 建立socket连接,然后用 用fputs() 发送消息,来实现的PHP多线程类代码:
$fp=fsockopen($_SERVER['HTTP_HOST'],80,&$errno,&$errstr,5); if(!$fp){ echo "$errstr ($errno)<br />n"; } fputs($fp,"GET $_SERVER[PHP_SELF]?flag=1rn"); fclose($fp);
上面这段代码只是一个线程的操作过程,多进行几个这样的操作就是多线程了,目前所谓PHP的多线程程序都是基于这个方式的.
下面给一个完整的线程类代码:
<?php /** @title:PHP多线程类(Thread) @version:1.0 phprm.com @author:axgle <axgle@126.com> */ class thread { var $count; function thread($count = 1) { $this->count = $count; } function _submit() { for ($i = 1; $i <= $this->count; $i++) $this->_thread(); return true; } function _thread() { $fp = fsockopen($_SERVER['HTTP_HOST'], 80, &$errno, &$errstr, 5); if (!$fp) { echo "$errstr ($errno)<br />n"; } fputs($fp, "GET $_SERVER[PHP_SELF]?flag=1rn"); fclose($fp); } function exec($func) { isset($_GET['flag']) ? call_user_func($func) : $this->_submit(); } } //应用例子: $th = new thread(10); //10个线程 $th->exec('demo'); //执行行自定义的函数 function demo() { fopen('data/' . microtime() , 'w'); }

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