Extensions from wiki.sk89q.com

ContextualLogo.php

<?php
if (!defined('MEDIAWIKI')) {
    exit(1);
}
 
$wgExtensionCredits['other'][] = array(
    "name" => "ContextualLogo",
    "author" => "sk89q",
    "version" => '0.1.0',
    "url" => "http://www.sk89q.com",
    "description" => "Custom main logo that can be set per-page as needed."
);

class ContextualLogo {

    public function onArticlePageDataBefore( $article, $fields ) {
        global $wgLogo, $wgCustomLogos;
        
        if ( !isset( $wgCustomLogos ) || !is_array( $wgCustomLogos ) ) {
            return;
        }
        
        $basename = preg_replace( "#/.*$#", "", $article->getTitle() );
        if ( isset( $wgCustomLogos[$basename] ) ) {
            $file = wfFindFile( $wgCustomLogos[$basename] );
            
            if ( $file ) {
                $tnOpt = array(
                    'width' => 135,
                    'height' => 135
                );
                
                $thumb = $file->transform( $tnOpt );
                $wgLogo = $thumb->getUrl();
                $tpl->data['nav_urls']['mainpage']['href'] = Title::newFromText( $basename )->getLocalURL();
            }
        }
        
        return true;
    }
    
}

$contextualLogo = new ContextualLogo();
$wgHooks['ArticlePageDataBefore'][] = $contextualLogo;

TitleFix.php

<?php
 
# Not a valid entry point, skip unless MEDIAWIKI is defined
if (!defined('MEDIAWIKI')) {
    exit(1);
}
 
$wgExtensionCredits['other'][] = array(
    "name" => "TitleFix",
    "author" => "sk89q",
    "version" => '1.0.1',
    "url" => "http://www.sk89q.com",
    "description" => "Make the rendering of subpage names much better using graphics."
);
 
$titleFixExt = new TitleFix_MediaWiki();
$titleFixExt->registerHooks();
 
 
class TitleFix_MediaWiki
{
    function onSkinTemplateOutputPageBeforeExec(&$m_skinTemplate, &$m_tpl) {
        if (!$m_tpl->data['isarticle']) {
            return true;
        }
        
        $html = "";
        $parts = explode("/", $m_tpl->data['title']);
        $i = 0;
        foreach ($parts as $part) {
            if ($html != "") {
                $html .= '<img src="/images/subpage_arrow.png" alt="/">';
            }
            if ($i == count($parts) - 1) {
                $html .= $part;
            } else {
                $html .= '<small>' . $part  . '</small>';
            }
            $i++;
        }
        $m_tpl->set('title', $html);
 
        return true;
    }
 
    public function registerHooks() {
        global $wgHooks;
 
        $wgHooks['SkinTemplateOutputPageBeforeExec'][] = array($this, 'onSkinTemplateOutputPageBeforeExec');
    }
}