How to execue PHP scripts in the background using EXEC() and CMD

Question

I can't use the $com = new Com('WScript.shell'); way, it's causing problems on my system. Probably I need to upgrade my PHP because it's very old (5.2), but I suppose what I'm trying to do is not version dependent.

I'm running PHP on Windows 2008 64-bit. Where I can run a command prefixed with start to run the command on a separate console.

start php myscript.php

If this is executed from the command line, it starts a new console for the script.

I need to do the same from PHP using exec only.

exec("CMD /C start php myscript.php");

/C is to terminate the CMD session when the script finishes.

But it's not giving the same results, it still waits for the script to terminate !

Marek · Accepted Answer · 2013-09-03 07:22:32Z

4

This shoul work:

exec("start /B php myscript.php");

Also close all standard streams at the very beginning of myscript.php:

fclose(STDIN);
fclose(STDOUT);
fclose(STDERR);

If you want echo to still work, you can open a file for writing to stdout after closing the standard streams:

$STDIN = fopen('/dev/null', 'r');
$STDOUT = fopen('myscript.log', 'wb');

edited Sep 3, 2013 at 7:22

answered Sep 2, 2013 at 14:51

Marek

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7 Comments

Muhammad Gelbana Over a year ago

Thanks a lot the start /B perfectly. But what are the other fclose statements ?! I'm not a PHP dev btw :)

Marek Over a year ago

Windows would not let program go to background unless it closes all 3 standard streams.

Muhammad Gelbana Over a year ago

Will this affect file logging or echo statements ?

Marek Over a year ago

File logging no, but echo statements yes - there's no stdout anymore. I'll update the answer with another solution.

Marek Over a year ago

On windows it's nul

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