diff --git a/main/lp/learnpath.class.php b/main/lp/learnpath.class.php
index 17d9d2abf2..dd88178b74 100755
--- a/main/lp/learnpath.class.php
+++ b/main/lp/learnpath.class.php
@@ -11726,7 +11726,7 @@ EOD;
 
             if (filter_extension($new_file_name)) {
                 $file_extension = explode('.', $image_array['name']);
-                $file_extension = strtolower($file_extension[sizeof($file_extension) - 1]);
+                $file_extension = strtolower($file_extension[count($file_extension) - 1]);
                 $filename = uniqid('');
                 $new_file_name = $filename.'.'.$file_extension;
                 $new_path = $updir.'/'.$new_file_name;
diff --git a/main/lp/lp_controller.php b/main/lp/lp_controller.php
index dcec95b7fa..7d84817a67 100755
--- a/main/lp/lp_controller.php
+++ b/main/lp/lp_controller.php
@@ -1190,8 +1190,6 @@ switch ($action) {
             $hide_toc_frame = null;
             if (isset($_REQUEST['hide_toc_frame']) && $_REQUEST['hide_toc_frame'] == 1) {
                 $hide_toc_frame = $_REQUEST['hide_toc_frame'];
-            } else {
-                $hide_toc_frame = null;
             }
             $_SESSION['oLP']->set_hide_toc_frame($hide_toc_frame);
             $_SESSION['oLP']->set_prerequisite(isset($_POST['prerequisites']) ? (int) $_POST['prerequisites'] : 0);
diff --git a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseBuilder.php b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseBuilder.php
index 08a0ab2649..688714a220 100644
--- a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseBuilder.php
+++ b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseBuilder.php
@@ -1429,7 +1429,7 @@ class CourseBuilder
         $courseId = (int) $courseId;
 
         if (!empty($session_id) && !empty($courseId)) {
-            $session_id = intval($session_id);
+            $session_id = (int) $session_id;
             if ($withBaseContent) {
                 $sessionCondition = api_get_session_condition(
                     $session_id,
@@ -1527,7 +1527,7 @@ class CourseBuilder
                 $this->course->add_resource($lp);
 
                 if (!empty($obj->preview_image)) {
-                    // Add LP teacher image
+                    // Add LP image
                     $asset = new Asset(
                         $obj->preview_image,
                         '/upload/learning_path/images/'.$obj->preview_image,