+<?php
+
+/**
+ * Generate an OpenSearch description file
+ */
+
+require_once( dirname(__FILE__) . '/includes/WebStart.php' );
+$shortName = htmlspecialchars( mb_substr( $wgSitename, 0, 16 ) );
+$siteName = htmlspecialchars( $wgSitename );
+$favicon = htmlspecialchars( $wgFavicon );
+$title = Title::makeTitle( NS_SPECIAL, 'Search' );
+$template = $title->getFullURL( 'search={searchTerms}' );
+
+$response = $wgRequest->response();
+$response->header( 'Content-type: application/opensearchdescription+xml' );
+
+# Set an Expires header so that squid can cache it for a short time
+# Short enough so that the sysadmin barely notices when $wgSitename is changed
+$expiryTime = 300; # 5 minutes
+$response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', time() + $expiryTime ) . ' GMT' );
+
+echo <<<EOT
+<?xml version="1.0"?>
+<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
+<ShortName>$shortName</ShortName>
+<Description>$siteName</Description>
+<Image height="16" width="16" type="image/x-icon">$favicon</Image>
+<Url type="text/html" method="get" template="$template"/>
+</OpenSearchDescription>
+EOT;
+
+?>