How can I debug exec() problems?

by

have a look at /etc/php.ini , there under:

; This directive allows you to disable certain functions for security reasons.
; It receives a comma-delimited list of function names. This directive is
; *NOT* affected by whether Safe Mode is turned On or Off.
; http://www.php.net/manual/en/ini.sect.safe-mode.php#ini.disable-functions
disable_functions =

make sure that exec is not listed like this:

disable_functions=exec

If so, remove it and restart the apache.

For easy debugging I usually like to execute the php file manually (Can request more errors without setting it in the main ini). to do so add the header: 

#!/usr/bin/php
ini_set("display_errors", 1);
ini_set("track_errors", 1);
ini_set("html_errors", 1);
error_reporting(E_ALL);

to the beginning of the file, give it permissions using chmod +x myscript.php and execute it ./myscript.php. It’s very heedful especially on a busy server that write a lot to the log file.

EDIT

Sounds like a permissions issue. Create a bash script that does something simple as echo "helo world" and try to run it. Make sure you have permissions for the file and for the folder containing the file. you chould just do chmod 755 just for testing.

More Related Contents:

  1. MySQLi Error: addcslashes() expects exactly 2 parameters, 1 given
  2. Is there a code obfuscator for PHP? [closed]
  3. Strict Standards: mysqli_next_result() error with mysqli_multi_query
  4. glob() – sort array of files by last modified datetime stamp
  5. Woocommerce, get current product id
  6. How to remove the querystring and get only the url?
  7. What is the difference between MySQL, MySQLi and PDO? [closed]
  8. Creating and Update Laravel Eloquent
  9. Display the discounted percentage near sale price in Single product pages for WC 3.0+
  10. bcrypt and randomly generated salts
  11. php pdo prepare repetitive variables
  12. preg_match() Unknown modifier ‘[‘ help
  13. How to make PDO run SET NAMES utf8 each time I connect, In ZendFramework
  14. PHP include best practices question
  15. Laravel Eloquent, group by month/year
  16. ini_set, set_time_limit, (max_execution_time) – not working
  17. Why are PHP function calls *so* expensive?
  18. How to retrieve comments from within an XML Document in PHP
  19. How to get data in function extend controller?
  20. Get the maximum value from an element in a multidimensional array? [duplicate]
  21. How can I convert a docx document to html using php?
  22. disable csrf in laravel for specific route
  23. Is there any way to install Composer globally on Windows?
  24. Cannot redeclare function php [duplicate]
  25. PHP get all arguments as array?
  26. Regex for password PHP [duplicate]
  27. WWW to non-WWW Redirect with PHP
  28. Show hide custom Woocommerce checkout field based on selected payment method
  29. Cannot figure out how to run a mysqli_multi_query and use the results from the last query
  30. Composer install error – requires ext_curl when it’s actually enabled

Leave a Comment