Why is crontab not executing my PHP script?

by

Given

*/30 * * * * php /var/www/html/result.php

There are multiple possibilities why it is not working:

  1. First of all it is important to check if the simple execution of php /var/www/html/result.php. This is required. But unfortunately, accomplishing this does not mean that the problem is solved.

  2. The path of the php binary has to be added.

    */30 * * * * php /var/www/html/result.php

    to be changed to

    */30 * * * * /usr/bin/php /var/www/html/result.php

    or whatever coming from which php.

  3. Check the permission of the script to the user running the crontab.

    Give execution permission to the file: chmod +x file. And make sure the crontab is launched by a user having rights to execute the script. Also check if the user can access the directory in which the file is located.

  4. To be safer, you can also add the php path in the top of the script, such as:

    #!/usr/bin/php -q
<?php

 ...

?>

  5. Make sure the user has rights to use crontab. Check if he is in the /etc/cron.d/deny file. Also, make a basic test to see if it is a crontanb or php problem.

    * * * * * touch /tmp/hello

  6. Output the result of the script to a log file, as William Niu suggested.

    */30 * * * * /usr/bin/php /var/www/html/result.php > /tmp/result

  7. Use the -f option to execute the script:

    */30 * * * * /usr/bin/php -f /var/www/html/result.php > /tmp/result

  8. Make sure the format in crontab is correct. You can do so for example using the site Crontab.guru.

To sum up, there are many possible reasons. One of them should solve the problem.

More Related Contents:

  1. Use PHP to create, edit and delete crontab jobs?
  2. Executing php with crontab
  3. Validating Crontab Entries with PHP
  4. How should a model be structured in MVC? [closed]
  5. Getting visitors country from their IP
  6. PHP DateTime::modify adding and subtracting months
  7. Laravel: Error [PDOException]: Could not Find Driver in PostgreSQL
  8. PHP variable variables
  9. PHP file cannot enter some part of code
  10. Undefined index with $_POST [duplicate]
  11. php send mail from localhost
  12. Using if(isset($_POST[‘submit’])) to not display echo when script is open is not working
  13. How can one run multiple versions of PHP 5.x on a development LAMP server?
  14. PHP built in server and .htaccess mod rewrites
  15. php file upload, how to restrict file upload type
  16. Double not (!!) operator in PHP
  17. Looping through all the properties of object php
  18. Notice: Undefined offset: 0 in
  19. PHP get dropdown value and text
  20. MySQL error when inserting data containing apostrophes (single quotes)?
  21. PHP pass variable to include
  22. variable variables
  23. PHP 7.4 deprecated get_magic_quotes_gpc function alternative
  24. Delete first 3 characters and last 3 characters from String PHP
  25. Replace tabs and spaces with a single space as well as carriage returns and newlines with a single newline
  26. move all files in a folder to another?
  27. What is the difference between null and empty?
  28. Lucene with PHP
  29. Routes in Codeigniter – Automatically
  30. Unset a row in a multidimensional array

Leave a Comment