[RESOLVED] How do I..

@MrCoderFeb 17.2007

How do I check if one PHP script is running within another PHP script.

Lets say “Script A” runs 24/7 pulling live data from a source and I wanted to make a “Script B” that could tell if “Script A” was still running or not.

If it was not running I would then be able to restart “Script A” using “Script B”.

Also..
I there a limit to the amount of PHP scripts that can be running at any given time, and if so where would I find this information?

Thanks,
MrC

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@NightShift58Feb 18.2007 — #Command line (CLI)?

@NightShift58Feb 18.2007 — #Not that I know the answer either way...

@pcthugFeb 18.2007 — #You could create a temporary file at the start of [B]script a[/B], and then destroy the temporary file at the end of [B]script a[/B]. The [B]script b[/B] just needs to detect whether the said temporary file exists.

@NightShift58Feb 18.2007 — #You could create a temporary file at the start of [B]script a[/B], and then destroy the temporary file at the end of [B]script a[/B]. The [B]script b[/B] just needs to detect whether the said temporary file exists.[/QUOTE]I don't think you can rely on that. You just need one script to fail, the file will not be deleted and all the other scripts would stumble over it.

You can use the file flagging method, but you must use flock() for that method to be reliable. Of course, all script using that "traffic light" must then adhere to the rule. See an example here:

http://www.webdeveloper.com/forum/showpost.php?p=714889&postcount=5

The reason I asked if he was going to run his scripts from the command line is that, within a Linux environment, there's a way to check on which processes are running and based on that, determine whether to launch the CLI PHP script.

@MrCoderauthorFeb 19.2007 — #Command line (CLI)?[/QUOTE]

Yes mate.

@NightShift58Feb 19.2007 — #If you start the PHP via a shell script, you can check which processes are running - such a shell script being one of them.

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