From 5c8f68171329a212935eccd5b41f4283ddea696b Mon Sep 17 00:00:00 2001
From: Sam Hemelryk <sam@moodle.com>
Date: Fri, 19 Apr 2013 09:49:44 +1200
Subject: [PATCH] MDL-39216 url: moodle_url now handles empty param values
 properly

---
 lib/weblib.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/weblib.php b/lib/weblib.php
index c77b8f7950e..17a20feab95 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -488,7 +488,11 @@ class moodle_url {
                     $arr[] = rawurlencode($key.'['.$index.']')."=".rawurlencode($value);
                 }
             } else {
-                $arr[] = rawurlencode($key)."=".rawurlencode($val);
+                if (isset($val) && $val !== '') {
+                    $arr[] = rawurlencode($key)."=".rawurlencode($val);
+                } else {
+                    $arr[] = rawurlencode($key);
+                }
             }
         }
         if ($escaped) {