How to execute a php script using cron?

Question

I am trying to execute a php file via cron every 2 minutes, but it's not working. My crontab is:

 */2 * * * * usr/bin/php /var/www/test/cron.php

What am I doing wrong?

Answer 1

Check the output of which php and use the absolute path for php (in my case /usr/bin/php5).

*/2 * * * * /usr/bin/php /var/www/test/cron.php

or just

*/2 * * * * php /var/www/test/cron.php

---

For clarification, the default $PATH for cron is

PATH=/usr/bin:/bin

You can check the $PATH with a test entry (Source):

* * * * * env > /tmp/env.output

Thus, the file

/tmp/env.output

is created.

You'll have to remove the entry * * * * * env > /tmp/env.output afterwards.

Answer 2

My recommendation would be to put call the script using standard web path, so you don't mingle the users and permissions, e.g. instead of doing:

/usr/bin/php <script>

rather do:

/usr/bin/wget -q http://localhost/test/cron.php

Then you need to make sure the script can be called just from localhost (f.e. using Apache2 access policy).

This way the cron script will be always run under the same user as the website which is a good policy to have in place.