From 9b99a1ad39b7313426346a62d6a8609e0fc40900 Mon Sep 17 00:00:00 2001
From: Julio <gugli100@gmail.com>
Date: Thu, 7 Jul 2016 15:34:37 +0200
Subject: [PATCH] Minor - fix php warnings

---
 main/inc/lib/diagnoser.lib.php  | 2 +-
 main/session/session_export.php | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/main/inc/lib/diagnoser.lib.php b/main/inc/lib/diagnoser.lib.php
index 1562cd7990..c22fde8381 100755
--- a/main/inc/lib/diagnoser.lib.php
+++ b/main/inc/lib/diagnoser.lib.php
@@ -28,7 +28,7 @@ class Diagnoser
     public function show_html()
     {
         $sections = array('chamilo', 'php', 'database', 'webserver');
-
+        $currentSection = isset($_GET['section']) ? $_GET['section'] : '';
         if (!in_array(trim($currentSection), $sections)) {
             $currentSection = 'chamilo';
         }
diff --git a/main/session/session_export.php b/main/session/session_export.php
index 3bb5df0c24..e02bb71ea2 100644
--- a/main/session/session_export.php
+++ b/main/session/session_export.php
@@ -234,8 +234,7 @@ if (isset($_POST['formSent'])) {
 			if (!empty($courses) && $cvs) {
 				$courses = api_substr($courses, 0, api_strlen($courses) - 1);
 			}
-			$add .= $courses;
-
+			$add = $courses;
 
 			if (in_array($file_type, ['csv', 'xls'])) {
 				$sessionListToExport[] = [