Running a PHP script completely on server side

Question

I'm having a problem where putty gets regularly disconnected. So, when I run a PHP script from the terminal, it always gets interrupted. The script is supposed to run several hours, so I'm not having any luck with it.

How can I completely run this from the server side? I'm reading about cron jobs, but I'm having a hard time understanding at this time. Is there any alternative to cron for what I need?

I have several script PHP files that need to be run, one by one, or perhaps two at a time. Any ideas?

Mahmoud Al-Qudsi · Accepted Answer · 2015-02-09 02:25:00Z

9

You don't need to leave it run in a cron job - you can just run the php script inside a screen.

Simply type;

screen php /path/to/myphpscript.php

A screen will continue running even after you disconnect from PuTTY. If you need to check up on it, you can use;

screen -r

To re-attach yourself to this process, and view any output.

edited Feb 9, 2015 at 2:25

Mahmoud Al-Qudsi

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answered Jun 26, 2012 at 2:55

Eoghan

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1 Comment

laketuna Over a year ago

This works well. I did: 1: screen to get in a screen. 2: php my_scripy.php to run the script. 3: from this point on, I can connect or detach from the screen and the script continues until it's finished.

Mahmoud Al-Qudsi · Accepted Answer · 2012-06-26 02:55:56Z

3

You need to prevent the process from terminating when the session disconnects.

Something like this would work:

nohup php myscript.php

answered Jun 26, 2012 at 2:55

Mahmoud Al-Qudsi

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4 Comments

laketuna Over a year ago

Mahmoud, I trying this right now. After I run this command, close putty, and reconnect, I don't see the process when I type ps a. Is that normal?

Mahmoud Al-Qudsi Over a year ago

ps a only shows the current session's processes. Look at top.

laketuna Over a year ago

This works as well. Thank you! Is there a way to know if the previous session's process is still running in a new session?

laketuna Over a year ago

I think ps a shows a screen's process in any session. This will works for me.

secretformula · Accepted Answer · 2012-06-26 02:56:08Z

1

You can create a cron job to start the php script periodically based on a list of time tasks. More info. You could also start the task in the background from the console. i.e. php-cgi script.php& this would make the script a background task

answered Jun 26, 2012 at 2:56

secretformula

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Wyatt Anderson · Accepted Answer · 2012-06-26 02:56:17Z

1

Take a look at GNU Screen; it allows you to detach and reattach a session later, which is perfect for long-running scripts. Cron is a good option if you want it to happen in a recurring fashion; one-off batch jobs can be scheduled with something like at. For more intense computing needs, you might want to look into a more full-fledged job scheduling system like TORQUE.

answered Jun 26, 2012 at 2:56

Wyatt Anderson

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J.L. · Accepted Answer · 2012-06-26 02:57:51Z

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You can run your program in background

php ./yourscript.php &

answered Jun 26, 2012 at 2:57

J.L.

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1 Comment

Mahmoud Al-Qudsi Over a year ago

Backgrounding a process does not allow it to survive a session termination.

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