Running process in background with PHP using exec? [duplicate]

Question

Possible Duplicate:
php in background exec() function

After a certain script runs on website I want to do a bit of processing in the background which could take a little long to run on the page request. I heard you can do this by using the exec() method to run a PHP script. If this is a good way to do it how do I pass a query string to PHP script with the exec() method?

EDIT: It's not a duplicate because the post you're referring to doesn't deal with my question about query string/argument passing.

What do you mean by "query string" -- when using PHP on the command line, instead of through apache, there is no _GET array. You deal with the $args array of command-line arguments. These are passed on the command line after the script name itself, with spaces separating them. — Rylab
– Rylab, Commented Dec 14, 2011 at 1:31
Okay thanks. I'm sorry I've never ran PHP on the command line. — Undefined
– Undefined, Commented Dec 14, 2011 at 9:43

George P · Accepted Answer · 2011-12-14 01:29:02Z

1

If you want to run a PHP script in the background using PHP, then you can do the following:

$command = "php -d max_execution_time=50 -f myfile.php '".$param."' >/dev/null &";
exec($command);

$param is a variable you want to pass into the file.

answered Dec 14, 2011 at 1:29

George P

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3 Comments

sarnold Over a year ago

Using exec() in this fashion can be dangerous if $param was supplied from (or improperly derived from) user-supplied input. See Wikipedia's notes on shell injection vulnerabilities for details.

George P Over a year ago

Yeah for sure.. I was assuming he was setting the value himself like $param = "idx" for example

sarnold Over a year ago

Since you took care to use max_execution_time I figured your code would be fine -- but not everyone reading this would know that already. :)

Community · Accepted Answer · 2023-11-20 22:45:59Z

0

Since your script runs in the background and not in a terminal, try ignore_user_abort( TRUE ); execution flow continues until execution is complete, and not when the tab or window or network connection is closed.

edited Nov 20, 2023 at 22:45

CommunityBot

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answered Dec 14, 2011 at 3:27

meathive

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