Extension:FileCheck

What can this extension do?
FileCheck is a MediaWiki extension that automatically detects duplicate files on upload, prevents the upload of an already existing file and prints out the thumbnail, name (and link) to the already uploaded file(s). With the option "Ignore duplicate warning" at the upload form you can overwrite the warning and proceed anyway.

This extension is for MediaWiki 1.11 and 1.12 only! Since MediaWiki 1.13alpha Revision 35609 this feature is included into the MediaWiki core and there is no more need for this extension.

Installation
To install this extension, add the following to LocalSettings.php: