Execute a shell command in PHP without waiting for the results

Question

I have a problem when executing a shell command. The problem is that I would like to run a command exec('du -sh /var/www/backups/* > backups.log') but I would like to just press "START" and read backups.log later. Right now when I press the button I have to wait until it finishes, so the page waits until the script finishes.

Mike Brant · Accepted Answer · 2012-08-16 17:02:39Z

5

Trying launching the process in the background by adding "&" like this:

exec('du -sh /var/www/backups/* > backups.log &');

answered Aug 16, 2012 at 17:02

Mike Brant

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user1603136 · Accepted Answer · 2012-08-16 17:03:46Z

0

You can use AJAX for resolve this problem, no ? When the user click on start, execute your Php script. During that, you can do everything else.

answered Aug 16, 2012 at 17:03

user1603136

1 Comment

Robert K Over a year ago

It wouldn't be reliable. The ajax request will wait for the script to complete, which may take minutes, and the php script would likely terminate once the connection dropped (if the user left the page).

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