From ef0688bf35ed214e555e7dddd6996ecbdec2c39d Mon Sep 17 00:00:00 2001
From: Dmitrii Metelkin <dmitriim@catalyst-au.net>
Date: Wed, 3 Oct 2018 10:13:02 +1000
Subject: [PATCH] MDL-51969 mod_lti: Fixed missing tool proxy GUID

---
 mod/lti/classes/local/ltiservice/resource_base.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mod/lti/classes/local/ltiservice/resource_base.php b/mod/lti/classes/local/ltiservice/resource_base.php
index 4d617fe1f21..60c7327e03a 100644
--- a/mod/lti/classes/local/ltiservice/resource_base.php
+++ b/mod/lti/classes/local/ltiservice/resource_base.php
@@ -255,7 +255,7 @@ abstract class resource_base {
 
         if (empty($this->params)) {
             $this->params = array();
-            if (isset($_SERVER['PATH_INFO'])) {
+            if (isset($_SERVER['PATH_INFO']) && !empty($_SERVER['PATH_INFO'])) {
                 $path = explode('/', $_SERVER['PATH_INFO']);
                 $parts = explode('/', $this->get_template());
                 for ($i = 0; $i < count($parts); $i++) {