Ticket #23689: get_blogaddress_by_name.patch

wp-includes/ms-blogs.php

@@ -48 +48 @@
                         $blogname = 'www';
                 $url = rtrim( network_home_url(), '/' );
                 if ( !empty( $blogname ) )
-                        $url = preg_replace( '|^([^\.]+://)|', '$1' . $blogname . '.', $url );
+                        $url = preg_replace( '|^([^\.]+://)|', "\${1}" . $blogname . '.', $url );
         } else {
                 $url = network_home_url( $blogname );
         }