diff --git a/main/document/document.php b/main/document/document.php
index f9f23061d4..f1f91580da 100755
--- a/main/document/document.php
+++ b/main/document/document.php
@@ -1471,7 +1471,7 @@ if ($isAllowedToEdit ||
             'post',
             api_get_self()."?add_as_template=$document_id_for_template"
         );
-        $frmAddTemplate ->addHeader(get_lang('AddAsTemplate'));
+        $frmAddTemplate->addHeader(get_lang('AddAsTemplate'));
         $frmAddTemplate->addText('template_title', get_lang('TemplateName'), true);
         $frmAddTemplate->addFile('template_image', get_lang('TemplateImage'), ['id' => 'template_image']);
         $frmAddTemplate->addButtonSave(get_lang('CreateTemplate'), 'create_template');
diff --git a/main/exercise/exercise.class.php b/main/exercise/exercise.class.php
index 88733086e6..66ee3001c5 100755
--- a/main/exercise/exercise.class.php
+++ b/main/exercise/exercise.class.php
@@ -9937,6 +9937,44 @@ class Exercise
         return count($answers);
     }
 
+    public static function allowAction($action)
+    {
+        if (api_is_platform_admin()) {
+            return true;
+        }
+
+        $limitTeacherAccess = api_get_configuration_value('limit_exercise_teacher_access');
+        $disableClean = api_get_configuration_value('disable_clean_exercise_results_for_teachers');
+
+        switch ($action) {
+            case 'delete':
+                if (api_is_allowed_to_edit(null, true)) {
+                    if ($limitTeacherAccess) {
+                        return false;
+                    }
+
+                    return true;
+                }
+                break;
+            case 'clean_results':
+                if (api_is_allowed_to_edit(null, true)) {
+                    if ($limitTeacherAccess) {
+                        return false;
+                    }
+
+                    if ($disableClean) {
+                        return false;
+                    }
+
+                    return true;
+                }
+
+                break;
+        }
+
+        return false;
+    }
+
     /**
      * Get number of questions in exercise by user attempt.
      *
@@ -10449,43 +10487,4 @@ class Exercise
 
         return $group;
     }
-
-    public static function allowAction($action)
-    {
-        if (api_is_platform_admin()) {
-            return true;
-        }
-
-        $limitTeacherAccess = api_get_configuration_value('limit_exercise_teacher_access');
-        $disableClean = api_get_configuration_value('disable_clean_exercise_results_for_teachers');
-
-        switch ($action) {
-            case 'delete':
-                if (api_is_allowed_to_edit(null, true)) {
-                    if ($limitTeacherAccess) {
-                        return false;
-                    }
-
-                    return true;
-                }
-                break;
-            case 'clean_results':
-                if (api_is_allowed_to_edit(null, true)) {
-                    if ($limitTeacherAccess) {
-                        return false;
-                    }
-
-                    if ($disableClean) {
-                        return false;
-                    }
-
-                    return true;
-                }
-
-                break;
-        }
-
-
-        return false;
-    }
 }
diff --git a/main/inc/lib/usermanager.lib.php b/main/inc/lib/usermanager.lib.php
index 2ca958880e..a7f2b7f657 100755
--- a/main/inc/lib/usermanager.lib.php
+++ b/main/inc/lib/usermanager.lib.php
@@ -7002,6 +7002,19 @@ SQL;
         return Database::num_rows($result) > 0;
     }
 
+    /**
+     * @param int $userInfo
+     *
+     * @throws Exception
+     */
+    public static function deleteUserFiles($userId)
+    {
+        $path = self::getUserPathById($userId, 'system');
+
+        $fs = new Filesystem();
+        $fs->remove($path);
+    }
+
     /**
      * @return EncoderFactory
      */
@@ -7095,17 +7108,4 @@ SQL;
 
         return $url;
     }
-
-    /**
-     * @param int $userInfo
-     *
-     * @throws Exception
-     */
-    public static function deleteUserFiles($userId)
-    {
-        $path = self::getUserPathById($userId, 'system');
-
-        $fs = new Filesystem();
-        $fs->remove($path);
-    }
 }
diff --git a/main/survey/create_new_survey.php b/main/survey/create_new_survey.php
index 46f3a09eda..bcac0d3137 100755
--- a/main/survey/create_new_survey.php
+++ b/main/survey/create_new_survey.php
@@ -267,7 +267,7 @@ if (Gradebook::is_active()) {
 $surveytypes[0] = get_lang('Normal');
 $surveytypes[1] = get_lang('Conditional');
 
-if ($action == 'add') {
+if ($action === 'add') {
     $form->addElement('hidden', 'survey_type', 0);
     $survey_tree = new SurveyTree();
     $list_surveys = $survey_tree->createList($survey_tree->surveylist);
@@ -281,7 +281,7 @@ $form->addElement('checkbox', 'shuffle', null, get_lang('ActivateShuffle'));
 
 $input_name_list = null;
 
-if ($action == 'edit' && !empty($survey_id)) {
+if ($action === 'edit' && !empty($survey_id)) {
     if ($survey_data['anonymous'] == 0) {
         $form->addElement(
             'checkbox',
diff --git a/main/survey/survey_question.php b/main/survey/survey_question.php
index 51365e4e32..20201cb94d 100644
--- a/main/survey/survey_question.php
+++ b/main/survey/survey_question.php
@@ -538,6 +538,7 @@ class survey_question
      * Get the JS for questions that can depend on a previous question
      * (and that hides those questions until something changes in the previous
      * question).
+     *
      * @return string HTML code
      */
     public static function getJs()
@@ -555,12 +556,14 @@ class survey_question
     }
 
     /**
-     * Get the question parents recursively, if any. This function depends on 
-     * the existence of a parent_id field, which depends on the 
+     * Get the question parents recursively, if any. This function depends on
+     * the existence of a parent_id field, which depends on the
      * 'survey_question_dependency' setting and its corresponding SQL
      * requirements.
-     * @param int $questionId The c_survey_question.question.id
-     * @param array $list An array of parents to be extended by this method
+     *
+     * @param int   $questionId The c_survey_question.question.id
+     * @param array $list       An array of parents to be extended by this method
+     *
      * @return array The completed array of parents
      */
     public static function getParents($questionId, $list = [])
@@ -587,7 +590,9 @@ class survey_question
     /**
      * Creates the JS code for the given parent question so that it shows
      * the children questions when a specific answer of the parent is selected.
+     *
      * @param array $question An array with the question details
+     *
      * @return string JS code to add to the HTML survey question page
      */
     public static function getQuestionJs($question)
@@ -628,8 +633,10 @@ class survey_question
     }
 
     /**
-     * Returns the (children) questions that have the given question as parent
+     * Returns the (children) questions that have the given question as parent.
+     *
      * @param array $question An array describing the parent question
+     *
      * @return array The questions that have the given question as parent
      */
     public static function getDependency($question)
@@ -651,7 +658,8 @@ class survey_question
     }
 
     /**
-     * This method is not implemented at this level (returns null)
+     * This method is not implemented at this level (returns null).
+     *
      * @param array $questionData
      * @param array $answers
      */