1

I have this example script:

<?php
    $time = time();
    shell_exec('nohup sleep 30 2>/tmp/test >/tmp/test &');
    $time2 = time();
    echo $time2 - $time;
?>

when I run it for the first time it show immediately 0 , but when I run it for the second time it wait for the sleep command to finish the it shows the 0. what should i do to make it run immediately without waiting for the sleep command ?

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3
  • I would guess that the file is locked. So if you want to run it multiple times simultaneously, you should use different / random file names. Commented May 26, 2015 at 14:30
  • stackoverflow.com/questions/9100872/… Commented May 26, 2015 at 15:14
  • Do you want to do a "sleep" command or a "background" command? Commented May 26, 2015 at 15:14
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