How to check if a php script is still running

Question

I have a PHP script that listens on a queue. Theoretically, it's never supposed to die. Is there something to check if it's still running? Something like Ruby's God ( http://god.rubyforge.org/ ) for PHP?

God is language agnostic but it would be nice to have a solution that works on windows as well.

Answer 1

Simple bash script

#!/bin/bash
while [true]; do
    if ! pidof -x script.php;
    then
     php script.php &
    fi
done

Answer 2

One possible solution is to have it listen on a port using the socket functions. You can check that the socket is still listening with a simple script. Even a monitoring service like pingdom could monitor its status. If it dies, the socket is no longer listening.

Plenty of solutions.. Good luck.

Answer 3

Not for windows, but...

I've got a couple of long-running PHP scripts, that have a shell script wrapping it. You can optionally return a value from the script that will be checked in the shell-script to exit, restart immediately, or sleep for a few seconds -and then restart.

Here's a simple one that just keeps running the PHP script till it's manually stopped.

#!/bin/bash
clear
date
php -f cli-SCRIPT.php
echo "wait a little while ..."; sleep 10
exec $0

The "exec $0" restarts the script, without creating a sub-process that will have to unravel later (and take up resources in the meantime). This bash script wraps a mail-sender, so it's not a problem if it exits and pauses for a moment.

Answer 4

Just append a second command after the script. When/if it stops, the second command is invoked. Eg.:

php daemon.php 2>&1 | mail -s "Daemon stopped" [email protected]

Edit:

Technically, this invokes the mailer right away, but only completes the command when the php script ends. Doing this captures the output of the php-script and includes in the mail body, which can be useful for debugging what caused the script to halt.

Answer 5

If you have your hands on the script, you can just ask him to set a time value every X times in db, and then let a cron job check if that value is up to date.

Answer 6

troelskn wrote:

Just append a second command after the script. When/if it stops, the second command is invoked. Eg.:

php daemon.php | mail -s "Daemon stopped" [email protected]

This will call mail each time a line is printed in daemon.php (which should be never, but still.)

Instead, use the double ampersand operator to separate the commands, i.e.

php daemon.php & mail -s "Daemon stopped" [email protected]