Support tab blank page

The blank page happens on servers when clicking the Support tab and the mysql_upgrader detects that the database_cleaner class does not exist. Disabling the check in mysql_upgrader.php results in the page working, but the mysql_upgrader tool is not available. The database cleaner tool is available and works fine.

It seems that on some servers, the database cleaner tool is not loaded when mysql_upgrader is loaded, yet the database cleaner is loaded at a later time causing it to be loaded twice. Putting a check in the database cleaner to see if it is already loaded prevents it from being load twice.

OPEN tools/support/database_cleaner.php
FIND

if (!defined('IN_PHPBB'))

{

	exit;

}

AFTER,ADD

if (!class_exists('database_cleaner'))

{

FIND

		// Redirect to the next step

		redirect(append_sid(STK_INDEX, array('c' => 'support', 't' => 'database_cleaner', 'step' => $this->step + 1, 'did_run' => $did_run)));

	}

}

AFTER,ADD{code}}

SAVE/CLOSE