From c771bb9dd79d79a26c3a2a69560c02effb9ae527 Mon Sep 17 00:00:00 2001
From: jmontoyaa <gugli100@gmail.com>
Date: Thu, 1 Sep 2016 15:54:51 +0200
Subject: [PATCH] Validate function params

---
 main/inc/lib/sessionmanager.lib.php | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/main/inc/lib/sessionmanager.lib.php b/main/inc/lib/sessionmanager.lib.php
index 29cbab6c4c..9413725fa9 100755
--- a/main/inc/lib/sessionmanager.lib.php
+++ b/main/inc/lib/sessionmanager.lib.php
@@ -2776,17 +2776,16 @@ class SessionManager
             $session_id = api_get_session_id();
         }
 
-        if (empty($session_id)) {
-            return false;
-        }
-
-
         if (!empty($courseId)) {
             $courseId = intval($courseId);
         } else {
             $courseId = api_get_course_id();
         }
 
+        if (empty($session_id) || empty($courseId) || empty($user_id)) {
+            return false;
+        }
+
         // Table definition
         $tbl_session_rel_course_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
         $tbl_session_rel_user = Database::get_main_table(TABLE_MAIN_SESSION_USER);