Manual:thumb.php

MediaWiki File: thumb.php
Location:	/
Source code:	master 1.20.5 • 1.19.6
Classes:	None

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 f for file name, w for width, p 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 /wiki directory, something like this should work on apache:

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^wiki/images/thumb/[0-9a-f]/[0-9a-f][0-9a-f]/([^/]+)/([0-9]+)px-.*$ /wiki/thumb_handler.php [L,QSA]
# If your $wgHashedUploadDirectory is false, remove the first two steps after thumb/
 
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^wiki/images/thumb/archive/[0-9a-f]/[0-9a-f][0-9a-f]/([^/]+)/([0-9]+)px-.*$ /wiki/thumb_handler.php [L,QSA]
# If your $wgHashedUploadDirectory is false, remove the first two steps after thumb/archive/

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:

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^wiki/images/thumb/[0-9a-f]/[0-9a-f][0-9a-f]/([^/]+)/([0-9]+)px-.*$ /wiki/thumb.php?f=$1&width=$2 [L,QSA,B]
# If your $wgHashedUploadDirectory is false, remove the first two steps after thumb/
 
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^wiki/images/thumb/archive/[0-9a-f]/[0-9a-f][0-9a-f]/([^/]+)/([0-9]+)px-.*$ /wiki/thumb.php?f=$1&width=$2&archived=1 [L,QSA,B]
# If your $wgHashedUploadDirectory is false, remove the first two steps after thumb/archive/

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