From 89fc2ea9a5198f446c4be8b6b6d3c178d9faa06b Mon Sep 17 00:00:00 2001
From: jmontoyaa <gugli100@gmail.com>
Date: Mon, 29 Aug 2016 11:02:42 +0200
Subject: [PATCH] Fix PHP warning.

---
 main/document/upload.php | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/main/document/upload.php b/main/document/upload.php
index cfaaec6c16..1afa8a30b3 100755
--- a/main/document/upload.php
+++ b/main/document/upload.php
@@ -51,24 +51,28 @@ $base_work_dir = $sys_course_path.$courseDir;
 $sessionId = api_get_session_id();
 $selectcat = isset($_GET['selectcat']) ? Security::remove_XSS($_GET['selectcat']) : null;
 
-$document_data = DocumentManager::get_document_data_by_id(
-    $_REQUEST['id'],
-    api_get_course_id(),
-    true,
-    $sessionId
-);
+$document_data = [];
 
-if ($sessionId != 0 && !$document_data) {
+if (isset($_REQUEST['id'])) {
     $document_data = DocumentManager::get_document_data_by_id(
         $_REQUEST['id'],
         api_get_course_id(),
         true,
-        0
+        $sessionId
     );
+
+    if ($sessionId != 0 && !$document_data) {
+        $document_data = DocumentManager::get_document_data_by_id(
+            $_REQUEST['id'],
+            api_get_course_id(),
+            true,
+            0
+        );
+    }
 }
 
 if (empty($document_data)) {
-    $document_id  = $parent_id =  0;
+    $document_id = $parent_id =  0;
     $path = '/';
 } else {
     $document_id = $document_data['id'];
@@ -117,7 +121,6 @@ if (!empty($groupId)) {
     }
 } elseif ($is_allowed_to_edit ||
     DocumentManager::is_my_shared_folder(api_get_user_id(), $path, api_get_session_id())) {
-
 } else {
     // No course admin and no group member...
     api_not_allowed(true);