Minor adding comments, removing whitespaces.

main/exercice/answer.class.php

@@ -651,8 +651,8 @@ class Answer
 
         $TBL_REPONSES = Database::get_course_table(TABLE_QUIZ_ANSWER);
 
-        if (self::getQuestionType() == MULTIPLE_ANSWER_TRUE_FALSE || self::getQuestionType(
-        ) == MULTIPLE_ANSWER_TRUE_FALSE
+        if (self::getQuestionType() == MULTIPLE_ANSWER_TRUE_FALSE ||
+            self::getQuestionType() == MULTIPLE_ANSWER_TRUE_FALSE
         ) {
 
             // Selecting origin options
@@ -677,7 +677,7 @@ class Answer
 
         // if at least one answer
         if ($this->nbrAnswers) {
-            // inserts new answers into data base
+            // Insert new answers into database.
 
             $c_id = $course_info['real_id'];
             $correct_answers = array();
@@ -693,8 +693,6 @@ class Answer
                 $answer = Database::escape_string($this->answer[$i]);
                 $correct = Database::escape_string($this->correct[$i]);
 
-
-
                 if (self::getQuestionType() == MULTIPLE_ANSWER_TRUE_FALSE || self::getQuestionType() == MULTIPLE_ANSWER_TRUE_FALSE) {
                     $correct = $fixed_list[intval($correct)];
                 }

main/exercice/question.class.php

@@ -1255,6 +1255,7 @@ abstract class Question
                 Database::insert($TBL_QUESTION_OPTIONS, $item);
             }
         }
+
         $this->duplicate_category_question($new_question_id, $course_id);
 
         // Duplicates the picture of the hotspot
@@ -1263,20 +1264,31 @@ abstract class Question
         return $new_question_id;
     }
 
+    /**
+     * Get categories from question
+     * @return array
+     */
     public function get_categories_from_question()
     {
         return Testcategory::getCategoryForQuestion($this->id);
     }
 
-    public function duplicate_category_question($question_id, $course_id)
+    /**
+     * @param int $questionId
+     * @param int $courseId
+     */
+    public function duplicate_category_question($questionId, $courseId)
     {
-        $question   = Question::read($question_id, $course_id);
+        $question   = Question::read($questionId, $courseId);
         $categories = $this->get_categories_from_question();
         if (!empty($categories)) {
             $question->saveCategories($categories);
         }
     }
 
+    /**
+     * @return array|string
+     */
     public function get_question_type_name()
     {
         $key = self::$questionTypes[$this->type];
@@ -1284,6 +1296,10 @@ abstract class Question
         return get_lang($key[1]);
     }
 
+    /**
+     * @param string $type
+     * @return null
+     */
     public static function get_question_type($type)
     {
         if ($type == ORAL_EXPRESSION && api_get_setting('enable_nanogong') != 'true') {
@@ -1293,6 +1309,9 @@ abstract class Question
         return self::$questionTypes[$type];
     }
 
+    /**
+     * @return array
+     */
     public static function get_question_type_list()
     {
         if (api_get_setting('enable_nanogong') != 'true') {