MDL-8029 removed obsoleted use of nvl() from weblib

diff --git a/lib/weblib.php b/lib/weblib.php
index e079a47a5e1be4578e7dd9a570af4b724b214f98..972ec7f392d7b54939aa3dfc12a3810dc68a046e 100644 (file)
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -158,8 +158,11 @@ function p($var, $strip=false) {
  * @return string
  */
 function get_referer() {
-
-    return strip_querystring(nvl($_SERVER['HTTP_REFERER']));
+    if (isset($_SERVER['HTTP_REFERER'])) {
+        return strip_querystring($_SERVER['HTTP_REFERER']);
+    } else {
+        return '';        
+    }
 }