From 04b4210605caae2d46b124cfd36ff01cc68bceba Mon Sep 17 00:00:00 2001
From: Rossiani Wijaya <rwijaya@moodle.com>
Date: Fri, 11 Mar 2011 12:14:29 +0800
Subject: [PATCH] MDL-19555: add NULL string test to format_test(). Credit goes
 to Matej Vela. Thanks

---
 lib/weblib.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/weblib.php b/lib/weblib.php
index dfd570402fe..73640b33c6f 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -1502,7 +1502,7 @@ function format_text($text, $format=FORMAT_MOODLE, $options=NULL, $courseid=NULL
 
     static $croncache = array();
 
-    if ($text === '') {
+    if ($text === '' || is_null($text)) {
         return ''; // no need to do any filters and cleaning
     }