Ticket #46791: 46791-2.diff

wp-includes/formatting.php

@@ -4190 +4190 @@
         $url = str_replace( ';//', '://', $url );
         /* If the URL doesn't appear to contain a scheme, we
          * presume it needs http:// prepended (unless a relative
-         * link starting with /, # or ? or a php file).
+         * link starting with ., /, # or ? or a php file).
          */
-        if ( strpos( $url, ':' ) === false && ! in_array( $url[0], array( '/', '#', '?' ) ) &&
+        if ( strpos( $url, ':' ) === false && ! in_array( $url[0], array( '.', '/', '#', '?' ) ) &&
                 ! preg_match( '/^[a-z0-9-]+?\.php/i', $url ) ) {
                 $url = 'http://' . $url;
         }