Sven/PHP
From Organic Design wiki
Debugging PHP
In MediaWiki there is a profiler that can be set, see MW:How to debug.
Debuggers generally use a W:Stack trace. This can be approximated by using print and die statements in sections of code.
PHP errors
To see PHP errors, add this to the very top of LocalSettings.php:
error_reporting(E_ALL);
ini_set("display_errors", 1);
