diff --git a/main/inc/lib/AnnouncementManager.php b/main/inc/lib/AnnouncementManager.php
index 768d358730..9fe001d706 100755
--- a/main/inc/lib/AnnouncementManager.php
+++ b/main/inc/lib/AnnouncementManager.php
@@ -1412,7 +1412,7 @@ class AnnouncementManager
                     'comment' => $file_comment,
                     'path' => $new_file_name,
                     'announcement_id' => $announcement_id,
-                    'size' => intval($file['size']),
+                    'size' => (int) $file['size'],
                 ];
 
                 $insertId = Database::insert($table, $params);
diff --git a/main/inc/lib/course_request.lib.php b/main/inc/lib/course_request.lib.php
index 33d409fdaf..cdd7728445 100755
--- a/main/inc/lib/course_request.lib.php
+++ b/main/inc/lib/course_request.lib.php
@@ -611,11 +611,20 @@ class CourseRequestManager
         $email_body .= get_lang('Email', null, $email_language).': '.api_get_setting('emailAdministrator', null, $email_language)."\n";
         $email_body .= "\n".get_lang('CourseRequestLegalNote', null, $email_language)."\n";
 
-        $sender_name = api_get_person_name(api_get_setting('administratorName'), api_get_setting('administratorSurname'), null, PERSON_NAME_EMAIL_ADDRESS);
+        $sender_name = api_get_person_name(
+            api_get_setting('administratorName'),
+            api_get_setting('administratorSurname'),
+            null,
+            PERSON_NAME_EMAIL_ADDRESS
+        );
         $sender_email = api_get_setting('emailAdministrator');
-        $recipient_name = api_get_person_name($user_info['firstname'], $user_info['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
+        $recipient_name = api_get_person_name(
+            $user_info['firstname'],
+            $user_info['lastname'],
+            null,
+            PERSON_NAME_EMAIL_ADDRESS
+        );
         $recipient_email = $user_info['mail'];
-        $extra_headers = 'Bcc: '.$sender_email;
 
         $additionalParameters = [
             'smsType' => SmsPlugin::COURSE_OPENING_REQUEST_CODE_REJECTED,
@@ -697,9 +706,13 @@ class CourseRequestManager
             PERSON_NAME_EMAIL_ADDRESS
         );
         $sender_email = api_get_setting('emailAdministrator');
-        $recipient_name = api_get_person_name($user_info['firstname'], $user_info['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
+        $recipient_name = api_get_person_name(
+            $user_info['firstname'],
+            $user_info['lastname'],
+            null,
+            PERSON_NAME_EMAIL_ADDRESS
+        );
         $recipient_email = $user_info['mail'];
-        $extra_headers = 'Bcc: '.$sender_email;
 
         $additionalParameters = [
             'smsType' => SmsPlugin::COURSE_OPENING_REQUEST_CODE,
diff --git a/main/inc/lib/message.lib.php b/main/inc/lib/message.lib.php
index 32bb17e93f..bdb6a40796 100755
--- a/main/inc/lib/message.lib.php
+++ b/main/inc/lib/message.lib.php
@@ -480,7 +480,6 @@ class MessageManager
         $parent_id = (int) $parent_id;
         $editMessageId = (int) $editMessageId;
         $topic_id = (int) $topic_id;
-
         $status = empty($status) ? MESSAGE_STATUS_UNREAD : (int) $status;
 
         if (!empty($receiver_user_id)) {
diff --git a/main/inc/lib/sessionmanager.lib.php b/main/inc/lib/sessionmanager.lib.php
index e8ce9cf03c..354e331812 100755
--- a/main/inc/lib/sessionmanager.lib.php
+++ b/main/inc/lib/sessionmanager.lib.php
@@ -315,27 +315,16 @@ class SessionManager
                     $sessionFieldValue = new ExtraFieldValue('session');
                     $sessionFieldValue->saveFieldValues($extraFields);
 
-                    /*
-                      Sends a message to the user_id = 1
-
-                      $user_info = api_get_user_info(1);
-                      $complete_name = $user_info['firstname'].' '.$user_info['lastname'];
-                      $subject = api_get_setting('siteName').' - '.get_lang('ANewSessionWasCreated');
-                      $message = get_lang('ANewSessionWasCreated')." <br /> ".get_lang('NameOfTheSession').' : '.$name;
-                      api_mail_html($complete_name, $user_info['email'], $subject, $message);
-                     *
-                     */
                     // Adding to the correct URL
                     UrlManager::add_session_to_url($session_id, $accessUrlId);
 
                     // add event to system log
-                    $user_id = api_get_user_id();
                     Event::addEvent(
                         LOG_SESSION_CREATE,
                         LOG_SESSION_ID,
                         $session_id,
                         api_get_utc_datetime(),
-                        $user_id
+                        api_get_user_id()
                     );
                 }
 
diff --git a/src/Chamilo/CoreBundle/Entity/Session.php b/src/Chamilo/CoreBundle/Entity/Session.php
index cb765ba937..a3d10dc780 100644
--- a/src/Chamilo/CoreBundle/Entity/Session.php
+++ b/src/Chamilo/CoreBundle/Entity/Session.php
@@ -53,7 +53,7 @@ class Session
     protected $courses;
 
     /**
-     * @var ArrayCollection
+     * @var ArrayCollection|SessionRelUser[]
      * @ORM\OneToMany(targetEntity="SessionRelUser", mappedBy="session", cascade={"persist"}, orphanRemoval=true)
      */
     protected $users;