Fix error where teacher cannot correct exercise see BT#11759

main/exercice/exercise_show.php

@@ -1,6 +1,8 @@
 <?php
 /* For licensing terms, see /license.txt */
 
+use ChamiloSession as Session;
+
 /**
  *  Shows the exercise results
  *
@@ -12,8 +14,6 @@
  *
  */
 
-use ChamiloSession as Session;
-
 require_once '../inc/global.inc.php';
 $debug = false;
 if (empty($origin)) {
@@ -208,7 +208,7 @@ if (!empty($track_exercise_info)) {
         if ($result_disabled == RESULT_DISABLE_NO_SCORE_AND_EXPECTED_ANSWERS) {
             $show_results = false;
             if ($origin != 'learnpath') {
-                echo '<table width="100%" border="0" cellspacing="0" cellpadding="0">
+                /*echo '<table width="100%" border="0" cellspacing="0" cellpadding="0">
                       <tr>
                         <td colspan="2">';
                 Display::display_warning_message(
@@ -217,7 +217,7 @@ if (!empty($track_exercise_info)) {
                 );
                 echo '</td>
                 </tr>
-                </table>';
+                </table>';*/
             }
         } elseif ($result_disabled == RESULT_DISABLE_SHOW_SCORE_ONLY) {
             $show_results = false;
@@ -262,6 +262,10 @@ if ($origin == 'learnpath' && !isset($_GET['fb_type'])) {
     $show_results = false;
 }
 
+if ($is_allowedToEdit && in_array($action, ['qualify', 'edit'])) {
+    $show_results = true;
+}
+
 if ($show_results || $show_only_total_score || $showTotalScoreAndUserChoices) {
     $user_info = api_get_user_info($student_id);
     //Shows exercise header
@@ -344,7 +348,6 @@ foreach ($questionList as $questionId) {
 $counter = 1;
 $exercise_content = null;
 $category_list = array();
-
 $useAdvancedEditor = true;
 
 if (!empty($maxEditors) && count($questionList) > $maxEditors) {
@@ -352,7 +355,7 @@ if (!empty($maxEditors) && count($questionList) > $maxEditors) {
 }
 
 foreach ($questionList as $questionId) {
-    $choice = $exerciseResult[$questionId];
+    $choice = isset($exerciseResult[$questionId]) ? $exerciseResult[$questionId] : '';
     // destruction of the Question object
     unset($objQuestionTmp);
 
@@ -626,7 +629,6 @@ foreach ($questionList as $questionId) {
     }
 
     $comnt = null;
-
     if ($show_results) {
         if (
             $is_allowedToEdit &&