redirectImage.php

<?php
/*
When this extension is enabled, it redirects every Image Page to the actual file,
unless 'showPage' is specified in the GET header
(e.g. http://wiki.org/wiki.php/Image:test.jpg?showPage=1)
*/

$wgHooks['OutputPageBeforeHTML'][] = 'redirectOnImagePage';

function redirectOnImagePage( &$out, &$text ) {
	global $wgTitle;
	# Check if 'showPage' is specified in GET header
	# if so, return
	if ( $_GET['showPage'] ) {
		return true;
	} else {
				return false;
	}
	# If this is an Image Page, redirect to file
	$ns = namespace::getCanonicalName( $wgTitle->getNamespace() );

	if ( $ns == 'Image' ) {
		$image = new Image( $wgTitle );
				$url = $image->getURL();
				$out->redirect( $url );
		return false;
	} else {
		return true;
	}
}