Replace xls with xlsx see BT#11698

main/exercise/exercise_result.class.php

@@ -408,9 +408,9 @@ class ExerciseResult
     ) {
         global $charset;
         $this->getExercisesReporting($document_path, $user_id, $export_filter, $exercise_id, $hotpotato_name);
-        $filename = 'exercise_results_'.api_get_local_time().'.xls';
+        $filename = 'exercise_results_'.api_get_local_time().'.xlsx';
         if (!empty($user_id)) {
-            $filename = 'exercise_results_user_'.$user_id.'_'.api_get_local_time().'.xls';
+            $filename = 'exercise_results_user_'.$user_id.'_'.api_get_local_time().'.xlsx';
         }
 
         $spreadsheet = new PHPExcel();

main/gradebook/lib/gradebook_result.class.php

@@ -79,7 +79,7 @@ class GradeBookResult
      */
     public function exportCompleteReportXLS($data)
     {
-        $filename = 'gradebook-results-'.api_get_local_time().'.xls';
+        $filename = 'gradebook-results-'.api_get_local_time().'.xlsx';
 
         $spreadsheet = new PHPExcel();
         $spreadsheet->setActiveSheetIndex(0);

main/mySpace/current_courses.php

@@ -9,7 +9,7 @@ $cidReset = true;
 require_once '../inc/global.inc.php';
 $this_section = SECTION_TRACKING;
 
-$filename = 'reporting.xls';
+$filename = 'reporting.xlsx';
 
 if (!api_is_allowed_to_create_course()) {
 	api_not_allowed(true);

main/survey/reporting.php

@@ -25,7 +25,7 @@ $survey_data = SurveyManager::get_survey($survey_id);
 if (isset($_POST['export_report']) && $_POST['export_report']) {
     switch ($_POST['export_format']) {
         case 'xls':
-            $filename = 'survey_results_'.$survey_id.'.xls';
+            $filename = 'survey_results_'.$survey_id.'.xlsx';
             $data = SurveyUtil::export_complete_report_xls(
                 $survey_data,
                 $filename,