在php中运行并忘记系统调用

Question

So I am trying to execute some script from my php code. That lives in page blah.php

<?php
     // ....
     // just basic web site that allows upload of file...
?>

Inside I use system call

if (system("blah.pl arg1") != 0)
{
   print "error
";
}
else
{
   print "working on it..you will receive e-mail at completion
";
}

Works great but it waits until it completes until it prints working on it. I am aware that I am calling perl script from php not a typo.

How can I just start program execution and let it complete in background. The blah.pl script handles e-mail notification.

Anyone?

Thanks I appreciate it

Answer 1

From system function documentation:

Note: If a program is started with this function, in order for it to continue running in the background, the output of the program must be redirected to a file or another output stream. Failing to do so will cause PHP to hang until the execution of the program ends.

Simply redirect the output of your Perl script and PHP should be able to run without having to wait for the script to finish.

system("blah.pl arg1 > /dev/null 2>&1 &");