php 后台 exec() 函数

问题描述

我制作这个脚本是为了测试 PHP 作为后台进程的执行

I made this script to test the execution of PHP as a background process

foreach($tests as $test) { 
   exec("php test.php ".$test["id"]); 
} 

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但是脚本的运行速度并不比没有添加 test.php 的所有脚本都快.

But the script does not run faster than when it was all in one script without the addition of test.php.

我做错了什么?

提前致谢！

推荐答案

exec() 将阻塞，直到您正在执行的进程完成 - 换句话说，您基本上是在运行您的'test.php' 作为子程序.您至少需要在命令行参数中添加一个 &，这会将 exec() 进程置于后台:

exec() will block until the process you're exec'ing has completed - in otherwords, you're basically running your 'test.php' as a subroutine. At bare minimum you need to add a & to the command line arguments, which would put that exec()'d process into the background:

exec("php test.php {$test['id']} &");

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