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PHP+shell实现多线程的方法

PHP+shell实现多线程的方法

这里介绍如何借助shell脚本实现多线程。

先写个简单的php代码,这里为了让脚本执行时间更长,方便看效果,sleep一下,呵呵!先看下test.php的代码:ls

PHP代码:

?
1
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<?php
for (<code class="php variable">$i=0;<code class="php variable">$i<code class="php variable">$i++) {
  echo<code class="php variable">$i;
  sleep(10);
}
?>

在看下shell脚本的代码,非常简单

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#!/bin/bash
for i in 1 2 3 4 5 6 7 8 9 10
do 
  /usr/bin/php-q /var/www/html/test.php &
done

注意到在请求php代码的那行有一个&符号吗,这个是关键,不加的话是不能进行多线程的,&表示讲服务推送到后台执行,因此,在 shell的每次的循环中不必等php的代码全部执行完在请求下一个文件,而是同时进行的,这样就实现了多线程,下面运行下shell看下效果,这里你将 看到10个test.php进程再跑,再利用linux的定时器,定时请求这个shell,在处理一些需要多线程的任务,例如,批量下载时,非常好用!

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