Fix php errors

main/exercice/exercise.php

@@ -675,7 +675,7 @@ if (!empty($exercise_list)) {
                 }
                 //$class_tip = 'exercise_link';
                 $url = $move.'<a '.$alt_title.' class="'.$class_tip.'" id="tooltip_'.$row['id'].'" href="overview.php?'.api_get_cidreq().$myorigin.$mylpid.$mylpitemid.'&exerciseId='.$row['id'].'">
-                             '.Display::returnIconPath('quiz.gif').'
+                             '.Display::return_icon('quiz.gif', $row['title']).'
                  '.$title.' </a>';
 
                 $item = Display::tag('td', $url.' '.$session_img.$lp_blocked);

main/inc/lib/exercise_show_functions.lib.php

@@ -67,13 +67,13 @@ class ExerciseShowFunctions
     public static function display_calculated_answer($feedback_type, $answer, $id, $questionId)
     {
         if (empty($id)) {
-            echo '<tr><td>'. (Security::remove_XSS($answer)).'</td></tr>';
+            echo '<tr><td>'. Security::remove_XSS($answer).'</td></tr>';
         } else {
         ?>
             <tr>
                 <td>
                     <?php
-                    echo (Security::remove_XSS($answer));
+                    echo Security::remove_XSS($answer);
                     ?>
                 </td>
 
@@ -97,7 +97,7 @@ class ExerciseShowFunctions
 	 * @param int       Question ID
 	 * @return void
 	 */
-	static function display_free_answer($feedback_type, $answer, $exe_id, $questionId, $questionScore = null)
+	public static function display_free_answer($feedback_type, $answer, $exe_id, $questionId, $questionScore = null)
     {
         $comments = Event::get_comments($exe_id, $questionId);
 
@@ -117,7 +117,7 @@ class ExerciseShowFunctions
         }
 	}
 
-	static function display_oral_expression_answer($feedback_type, $answer, $id, $questionId, $nano = null)
+	public static function display_oral_expression_answer($feedback_type, $answer, $id, $questionId, $nano = null)
     {
         if (isset($nano)) {
             echo $nano->show_audio_file();
@@ -236,7 +236,7 @@ class ExerciseShowFunctions
 	 * @param boolean Whether to show the answer comment or not
 	 * @return void
 	 */
-	static function display_unique_or_multiple_answer(
+	public static function display_unique_or_multiple_answer(
         $feedback_type,
         $answerType,
         $studentChoice,
@@ -257,7 +257,7 @@ class ExerciseShowFunctions
 		$icon .= $studentChoice?'_on':'_off';
 		$icon .= '.gif';
 
-		$iconAnswer = in_array($answerType, array(UNIQUE_ANSWER, UNIQUE_ANSWER_NO_OPTION))) ? 'radio':'checkbox';
+		$iconAnswer = in_array($answerType, array(UNIQUE_ANSWER, UNIQUE_ANSWER_NO_OPTION)) ? 'radio':'checkbox';
 		$iconAnswer .= $answerCorrect?'_on':'_off';
 		$iconAnswer .= '.gif';
 
@@ -326,7 +326,7 @@ class ExerciseShowFunctions
      * @param boolean Whether to show the answer comment or not
      * @return void
      */
-    static function display_multiple_answer_true_false(
+    public static function display_multiple_answer_true_false(
         $feedback_type,
         $answerType,
         $studentChoice,