This is a secure method to debug your apache from within php

For debugging without checking error_log/access_log files

  1. create a file called phpinfo.php in your / directory
  2. the contents of phpinfo.php

    <?php phpinfo(); ?>
  3. Use this for your .htaccess file.

    Options +FollowSymLinks
    ErrorDocument 404 /phpinfo.php

Now instead of getting a 404 error you will see debug information which will help you find out what the problem is.

Add security to phpinfo.php

Cd-MaN pointed out a security problem this method has, it reveals sensitive info to anyone who requests phpinfo.php.

Also, you better use it only as a temporary measure, because it reveals many sensitive information about your server (eg. delete it after you done debugging)

Here is a fix for this.

Secure phpinfo.php with .htaccess

This only allows the user from IP address, everyone else is redirected to

ErrorDocument 403
Order deny,allow
Deny from all
Allow from

Secure phpinfo.php with php

Same thing only uses .htaccess. Change your phpinfo.php file to the following

 $debugger = ob_get_clean();
 if ($_SERVER['REMOTE_ADDR'] == '')  echo $debugger;