qr code plugin

user/plugins/qr-code/plugin.php

@@ -0,0 +1,30 @@
+<?php
+/*
+Plugin Name: QR Code Short URLS
+Plugin URI: http://yourls.org/
+Description: Add .qr to shorturls to display QR Code
+Version: 1.0
+Author: Ozh
+Author URI: http://ozh.org/
+*/
+
+// Kick in if the loader does not recognize a valid pattern
+yourls_add_action( 'loader_failed', 'ozh_yourls_qrcode' );
+
+function ozh_yourls_qrcode( $request ) {
+        // Get authorized charset in keywords and make a regexp pattern
+        $pattern = yourls_make_regexp_pattern( yourls_get_shorturl_charset() );
+        
+        // Shorturl is like bleh.qr ?
+        if( preg_match( "@^([$pattern]+)\.qr?/?$@", $request[0], $matches ) ) {
+                // this shorturl exists ?
+                $keyword = yourls_sanitize_keyword( $matches[1] );
+                if( yourls_is_shorturl( $keyword ) ) {
+                        // Show the QR code then!
+                        header('Location: http://chart.apis.google.com/chart?chs=200x200&cht=qr&chld=M&chl='.YOURLS_SITE.'/'.$keyword);
+                        exit;
+                }
+        }
+}
+
+?>