diff --git a/public/main/course_info/download.php b/public/main/course_info/download.php
index 3f3e2c39ce..be05b3b595 100644
--- a/public/main/course_info/download.php
+++ b/public/main/course_info/download.php
@@ -27,7 +27,7 @@ if (empty($extension) || !file_exists($archive_path.$archive_file)) {
     exit;
 }
 
-$extension = strtolower($extension);
+//$extension = strtolower($extension);
 $content_type = '';
 
 if (in_array($extension, ['xml', 'csv']) &&
diff --git a/public/main/exercise/export/aiken/aiken_import.inc.php b/public/main/exercise/export/aiken/aiken_import.inc.php
index d4a422aa6b..d5e3172338 100644
--- a/public/main/exercise/export/aiken/aiken_import.inc.php
+++ b/public/main/exercise/export/aiken/aiken_import.inc.php
@@ -64,7 +64,7 @@ function aiken_import_exercise($file)
 
     $file_found = false;
     $operation = false;
-    $result = aiken_parse_file($exercise_info,   $file);
+    $result = aiken_parse_file($exercise_info, $file);
 
     if (true !== $result) {
         return $result;
diff --git a/public/main/inc/lib/fileUpload.lib.php b/public/main/inc/lib/fileUpload.lib.php
index 2486933742..a04873065d 100644
--- a/public/main/inc/lib/fileUpload.lib.php
+++ b/public/main/inc/lib/fileUpload.lib.php
@@ -1,7 +1,6 @@
 <?php
 /* For licensing terms, see /license.txt */
 
-use Chamilo\CoreBundle\Entity\ResourceLink;
 use Chamilo\CoreBundle\Framework\Container;
 use Chamilo\CourseBundle\Entity\CDocument;
 use Symfony\Component\HttpFoundation\File\UploadedFile;
diff --git a/public/main/lp/learnpathItem.class.php b/public/main/lp/learnpathItem.class.php
index bd14d96a5a..a1a7c2963f 100644
--- a/public/main/lp/learnpathItem.class.php
+++ b/public/main/lp/learnpathItem.class.php
@@ -5,7 +5,6 @@
 use Chamilo\CoreBundle\Framework\Container;
 use Chamilo\CourseBundle\Entity\CForum;
 use Chamilo\CourseBundle\Entity\CForumThread;
-use Chamilo\CourseBundle\Entity\CLp;
 use Chamilo\CourseBundle\Entity\CLpItem;
 
 /**
@@ -285,8 +284,8 @@ class learnpathItem
             error_log("Type: ".$type);
             error_log("get_id: ".$this->get_id());
         }
-        if ($type !== 'sco') {
-            if ($type == TOOL_QUIZ || $type == TOOL_HOTPOTATOES) {
+        if ('sco' !== $type) {
+            if (TOOL_QUIZ == $type || TOOL_HOTPOTATOES == $type) {
                 $this->get_status(
                     true,
                     true
@@ -308,6 +307,7 @@ class learnpathItem
         if ($debug) {
             error_log('End - learnpathItem:close');
         }
+
         return true;
     }
 
@@ -3709,7 +3709,7 @@ class learnpathItem
                     Database::update($item_view_table, $params, $where);
                 } else {
                     // For all other content types...
-                    if ($this->type === 'quiz') {
+                    if ('quiz' === $this->type) {
                         $my_status = ' ';
                         $total_time = ' ';
                         if (!empty($_REQUEST['exeId'])) {
@@ -4258,7 +4258,6 @@ class learnpathItem
      *
      * @param int $courseId  The course ID from the learning path
      * @param int $sessionId Optional. The session ID from the learning path
-     *
      */
     public function getForumThread($courseId, $sessionId = 0): ?CForumThread
     {