Run a php script every 5 seconds by using a shell script

Question

I would like to run a php script every 5 seconds.

That's what I've done :

(essay.sh file)

#!/bin/bash

while :
do
    php a_file.php
    sleep 5
done

(the php file in a nutshell)

<?php
// sql call

// sql into $json

$file = 'json.txt';

file_put_contents($file, $json);
?>

There is no error when I do: ./essay.sh, but the json.txt is not refreshed (nothing happen, and I've set the rights to 0755 for the both files).

When I use the direct url of a_file.php in my browser the script is working, and a new json.txt is generated.

Thank you for your help !

I don't think running script every 5 mins can be done except using cronjob. — Disha V., Jul 28 '15 at 05:25
Hi, I'd like to do it every 5 seconds and cron is limited to 1 minute at least — Alex01, Jul 28 '15 at 05:30
http://stackoverflow.com/questions/27898231/run-php-script-every-5-seconds — Disha V., Jul 28 '15 at 05:34
You could create a [daemon in PHP](http://stackoverflow.com/questions/2036654/run-php-script-as-daemon-process) that basically runs forever once start (either through cron or at system start). Allow the daemon to do some work and then sleep for 5 seconds. You could even fork processes depending on your situation. — zedfoxus, Jul 28 '15 at 05:44
What are you trying to do, exactly? i.e., why does it need to run every 5 seconds? There may be a more efficient solution to your problem. — Trick, Jul 28 '15 at 09:35

score 0 · Answer 1 · answered Jul 28 '15 at 05:30

0

Because your are setting 0755 you need to run your script as the same user as the owner of the json file.

Try to set the permissions to 775 or run the script as the owner of that json file.

answered Jul 28 '15 at 05:30

m.zander

Hi, still nothing happen. – Alex01 Jul 28 '15 at 05:48
nevertheless, you should really consider using a cronjob instead of sleep in php :-) – m.zander Jul 28 '15 at 05:51
Thank you for the importance of the permissions – Alex01 Jul 28 '15 at 10:06

score 0 · Accepted Answer · answered Jul 28 '15 at 07:59

0

I have tried your script in my pc and found out it works fine. This is the file privilege i set:

answered Jul 28 '15 at 07:59

cedricliang

Hi, I've no error from shell but the txt file is not overwrited by the supposed loaded php file by the shell script. And rights are: rwxrwxrwx for essay.sh and rwxrwxr-x for the php script and rwxrwxr-x for the txt file. – Alex01 Jul 28 '15 at 08:35
is the txt file created? check the file update time instead of content? – cedricliang Jul 28 '15 at 08:39
Yes it is and the time is not ./essay.sh (yet). Did you tried to create a txt file like me on the php script? – Alex01 Jul 28 '15 at 08:41
@Alex1 change script privelege to777? – cedricliang Jul 28 '15 at 08:42
The 3 files to 777 (same directory) and nothing happen – Alex01 Jul 28 '15 at 08:44
Ok it works with a different php script. Sorry but the php script itself presents no error... and can be loaded. I'll investigate this. – Alex01 Jul 28 '15 at 08:54
I've forgot to set the rights for the called files on the require_once function of php. Thank you! It works now! – Alex01 Jul 28 '15 at 09:59
@Alex1 ok. no problem. – cedricliang Jul 28 '15 at 10:00

2 Answers2