Manual:Thumb.php

Details
Script used to resize images if it is configured to be done when the web browser requests the image and not when generating the page.

To use it, set $wgThumbnailScriptPath to the path of this file.

Parameters are  for file name,   for width,   for page in multipaged files (if available).

Example: http://commons.wikimedia.org/w/thumb.php?f=Delle_strade_ferrate_e_della_loro_futura_influenza_in_Europa.djvu&w=600&p=206

404 Handler
This script can also be used as a 404 handler to generate image thumbs when they don't exist. To use it, follow the steps below, then set $wgGenerateThumbnailOnParse to false. If you have $wgLocalFileRepo defined in LocalSettings.php, then you need to also set $wgLocalFileRepo['transformVia404'] = true;

MediaWiki >= 1.20
Create a rewrite rule to call thumb_handler.php when a file in $wgUploadPath/thumb/ doesn't exist. If your wiki is in the /w directory, something like this should work on apache:

If this doesn't work, the 1.19 version should still work.

MediaWiki <= 1.19
Create a rewrite rule to call this script when a file in $wgUploadPath/thumb/ doesn't exist. If your wiki is in the /wiki directory, something like this should work on apache:


 * Example: http://www.mediawiki.org/w/thumb.php?f=example.jpg&width=100

Scripted transform
Just add to the bottom of LocalSettings.php. No apache config changes needed. This will cause thumb.php to either return the file if its already been rendered, or render the file on demand if needed.