diff --git a/public/main/inc/lib/exercise.lib.php b/public/main/inc/lib/exercise.lib.php
index bf5945aa9a..b06ff352dd 100644
--- a/public/main/inc/lib/exercise.lib.php
+++ b/public/main/inc/lib/exercise.lib.php
@@ -136,7 +136,7 @@ class ExerciseLib
                 case DRAGGABLE:
                 case MATCHING_DRAGGABLE:
                     if (DRAGGABLE == $answerType) {
-                        $isVertical = 'v' == $objQuestionTmp->extra;
+                        $isVertical = 'v' === $objQuestionTmp->extra;
                         $s .= '
                             <div class="row">
                                 <div class="col-md-12">
@@ -416,7 +416,7 @@ class ExerciseLib
                 ];
                 $counter2 = 0;
                 foreach ($objQuestionTmp->options as $item) {
-                    if ('True' == $item || 'False' == $item) {
+                    if ('True' === $item || 'False' === $item) {
                         $header2 .= Display::tag('td',
                             '&nbsp;',
                             ['style' => 'background-color: #F7E1D7; color: black;border-right: solid #FFFFFF 1px;']);
diff --git a/public/main/inc/lib/message.lib.php b/public/main/inc/lib/message.lib.php
index ffc64c0564..1237d41d01 100644
--- a/public/main/inc/lib/message.lib.php
+++ b/public/main/inc/lib/message.lib.php
@@ -924,7 +924,7 @@ class MessageManager
         }
         $em = Database::getManager();
         $repo = $em->getRepository(Message::class);
-        $criteria = ['id' => $id, 'userSenderId' => $user_sender_id];
+        $criteria = ['id' => $id, 'userSender' => $user_sender_id];
         $message = $repo->findOneBy($criteria);
 
         /*$table = Database::get_main_table(TABLE_MESSAGE);
diff --git a/src/CoreBundle/Entity/ResourceFile.php b/src/CoreBundle/Entity/ResourceFile.php
index 6db2f3176d..f17b942522 100644
--- a/src/CoreBundle/Entity/ResourceFile.php
+++ b/src/CoreBundle/Entity/ResourceFile.php
@@ -94,7 +94,7 @@ class ResourceFile
      * @Groups({"resource_file:read", "resource_node:read", "document:read"})
      * @ORM\Column(type="text", nullable=true)
      */
-    protected string $originalName;
+    protected $originalName;
 
     /**
      * @var string