diff --git a/public/main/exercise/admin.php b/public/main/exercise/admin.php
index 840277452d..4d13c829b5 100644
--- a/public/main/exercise/admin.php
+++ b/public/main/exercise/admin.php
@@ -375,7 +375,7 @@ if ($inATest) {
     if (false === $showPagination) {
         if ($objExercise->questionSelectionType >= EX_Q_SELECTION_CATEGORIES_ORDERED_QUESTIONS_ORDERED) {
             $alert .= sprintf(
-                '<br>'.get_lang('XQuestionsSelectedWithTotalScoreY'),
+                '<br>'.get_lang('Only %d questions will be selected based on the test configuration, for a total score of %s.'),
                 count($questionList),
                 $maxScoreAllQuestions
             );
diff --git a/public/main/tracking/exams.php b/public/main/tracking/exams.php
index 6aeff05bda..6245ed5eab 100644
--- a/public/main/tracking/exams.php
+++ b/public/main/tracking/exams.php
@@ -77,7 +77,16 @@ if ($global) {
         $form->addElement('select', 'exercise_id', get_lang('Exercise'), $exerciseList);
     }
 }
-$form->addButton('filter', get_lang('Filter'), 'filter', 'primary', null, null, ['style' => 'margin-top: 5px; margin-left: 15px;']);
+
+$form->addButton(
+    'filter',
+    get_lang('Filter'),
+    'filter',
+    'primary',
+    null,
+    null,
+    ['style' => 'margin-top: 5px; margin-left: 15px;']
+);
 
 $filter_score = isset($_REQUEST['score']) ? intval($_REQUEST['score']) : 70;
 $exerciseId = isset($_REQUEST['exercise_id']) ? intval($_REQUEST['exercise_id']) : 0;
diff --git a/src/CoreBundle/Component/Editor/Editor.php b/src/CoreBundle/Component/Editor/Editor.php
index 8510580a21..c52c7ec722 100644
--- a/src/CoreBundle/Component/Editor/Editor.php
+++ b/src/CoreBundle/Component/Editor/Editor.php
@@ -109,7 +109,7 @@ class Editor
      */
     public function processConfig($config): void
     {
-        if (is_array($config)) {
+        if (\is_array($config)) {
             foreach ($config as $key => $value) {
                 switch ($key) {
                     case 'ToolbarSet':
@@ -166,7 +166,7 @@ class Editor
      */
     protected function toJavascript($var)
     {
-        switch (gettype($var)) {
+        switch (\gettype($var)) {
             case 'boolean':
                 return $var ? 'true' : 'false'; // Lowercase necessary!
             case 'integer':
@@ -185,7 +185,7 @@ class Editor
                 // Arrays in JSON can't be associative. If the array is empty or if it
                 // has sequential whole number keys starting with 0, it's not associative
                 // so we can go ahead and convert it as an array.
-                if (empty($var) || array_keys($var) === range(0, count($var) - 1)) {
+                if (empty($var) || array_keys($var) === range(0, \count($var) - 1)) {
                     $output = [];
                     foreach ($var as $v) {
                         $output[] = $this->toJavascript($v);
diff --git a/src/CoreBundle/Component/Utils/AssetDirectoryNamer.php b/src/CoreBundle/Component/Utils/AssetDirectoryNamer.php
index a652e9e3d1..aa869d8cbd 100644
--- a/src/CoreBundle/Component/Utils/AssetDirectoryNamer.php
+++ b/src/CoreBundle/Component/Utils/AssetDirectoryNamer.php
@@ -39,7 +39,7 @@ class AssetDirectoryNamer implements DirectoryNamerInterface, ConfigurableInterf
 
         $this->propertyPath = $options['property'];
 
-        $options = \array_merge([
+        $options = array_merge([
             'chars_per_dir' => $this->charsPerDir,
             'dirs' => $this->dirs,
         ], $options);
@@ -57,12 +57,12 @@ class AssetDirectoryNamer implements DirectoryNamerInterface, ConfigurableInterf
 
         if (Asset::EXTRA_FIELD === $category) {
             for ($i = 0, $start = 0; $i < $this->dirs; $i++, $start += $this->charsPerDir) {
-                $parts[] = \substr($fileName, $start, $this->charsPerDir);
+                $parts[] = substr($fileName, $start, $this->charsPerDir);
             }
         } else {
             $parts[] = $fileName;
         }
 
-        return \implode('/', $parts);
+        return implode('/', $parts);
     }
 }
diff --git a/src/CoreBundle/Component/Utils/ChamiloApi.php b/src/CoreBundle/Component/Utils/ChamiloApi.php
index 0dc112ade1..317beb20c5 100644
--- a/src/CoreBundle/Component/Utils/ChamiloApi.php
+++ b/src/CoreBundle/Component/Utils/ChamiloApi.php
@@ -14,6 +14,7 @@ use DateTimeZone;
 use Display;
 use Exception;
 use Template;
+use const PHP_SAPI;
 
 class ChamiloApi
 {
@@ -41,7 +42,7 @@ class ChamiloApi
     public static function getConfigurationValue(string $variable)
     {
         $configuration = self::getConfigurationArray();
-        if (array_key_exists($variable, $configuration)) {
+        if (\array_key_exists($variable, $configuration)) {
             return $configuration[$variable];
         }
 
@@ -258,7 +259,7 @@ class ChamiloApi
                 'first'
             );
 
-            if (is_array($row) && isset($row['id'])) {
+            if (\is_array($row) && isset($row['id'])) {
                 return $row['id'];
             }
 
@@ -367,7 +368,7 @@ class ChamiloApi
             }
         }
         // If we want more colors, loop through existing colors
-        $count = count($palette);
+        $count = \count($palette);
         if (isset($fillUpTo) && $fillUpTo > $count) {
             for ($i = $count; $i < $fillUpTo; $i++) {
                 $palette[$i] = $palette[$i % $count];
diff --git a/src/CoreBundle/Composer/ScriptHandler.php b/src/CoreBundle/Composer/ScriptHandler.php
index 1b3c4b1d5c..415a7ac56c 100644
--- a/src/CoreBundle/Composer/ScriptHandler.php
+++ b/src/CoreBundle/Composer/ScriptHandler.php
@@ -23,7 +23,7 @@ class ScriptHandler
         $fs = new Filesystem();
         $fs->mirror($appCss, $newPath, null, ['override' => true]);*/
 
-        if (function_exists('opcache_reset')) {
+        if (\function_exists('opcache_reset')) {
             opcache_reset();
         }
     }
@@ -282,7 +282,7 @@ class ScriptHandler
         // Loop through the folder.
         $dir = dir($dirname);
         // A sanity check.
-        $is_object_dir = is_object($dir);
+        $is_object_dir = \is_object($dir);
         if ($is_object_dir) {
             while (false !== $entry = $dir->read()) {
                 // Skip pointers.
diff --git a/src/CoreBundle/Controller/AccountController.php b/src/CoreBundle/Controller/AccountController.php
index f0be69506e..e562c89b74 100644
--- a/src/CoreBundle/Controller/AccountController.php
+++ b/src/CoreBundle/Controller/AccountController.php
@@ -34,7 +34,7 @@ class AccountController extends BaseController
     {
         $user = $this->getUser();
 
-        if (!is_object($user) || !$user instanceof UserInterface) {
+        if (!\is_object($user) || !$user instanceof UserInterface) {
             throw $this->createAccessDeniedException('This user does not have access to this section');
         }
 
diff --git a/src/CoreBundle/Controller/Admin/SettingsController.php b/src/CoreBundle/Controller/Admin/SettingsController.php
index 4cbb93dd67..423e1fb9b2 100644
--- a/src/CoreBundle/Controller/Admin/SettingsController.php
+++ b/src/CoreBundle/Controller/Admin/SettingsController.php
@@ -81,7 +81,7 @@ class SettingsController extends BaseController
                 $form = $this->getSettingsFormFactory()->create($schemaAlias);
 
                 foreach (array_keys($settings->getParameters()) as $name) {
-                    if (!in_array($name, $list, true)) {
+                    if (!\in_array($name, $list, true)) {
                         $form->remove($name);
                         $settings->remove($name);
                     }
@@ -152,7 +152,7 @@ class SettingsController extends BaseController
         if (!empty($keyword)) {
             $params = $settings->getParameters();
             foreach (array_keys($params) as $name) {
-                if (!array_key_exists($name, $settingsFromKeyword)) {
+                if (!\array_key_exists($name, $settingsFromKeyword)) {
                     $form->remove($name);
                 }
             }
diff --git a/src/CoreBundle/Controller/Api/UpdateResourceNodeFileAction.php b/src/CoreBundle/Controller/Api/UpdateResourceNodeFileAction.php
index d3dae9ce5e..aa1a862601 100644
--- a/src/CoreBundle/Controller/Api/UpdateResourceNodeFileAction.php
+++ b/src/CoreBundle/Controller/Api/UpdateResourceNodeFileAction.php
@@ -39,7 +39,7 @@ class UpdateResourceNodeFileAction
             $resourceNode = $document->getResourceNode();
             if ($resourceNode->hasResourceFile()) {
                 $resourceNode->setContent($content);
-                $resourceNode->getResourceFile()->setSize(strlen($content));
+                $resourceNode->getResourceFile()->setSize(\strlen($content));
             }
             $resourceNode->setUpdatedAt(new DateTime());
             $resourceNode->getResourceFile()->setUpdatedAt(new DateTime());
diff --git a/src/CoreBundle/Controller/AssetController.php b/src/CoreBundle/Controller/AssetController.php
index 0c1f4a1d41..2501dd18bf 100644
--- a/src/CoreBundle/Controller/AssetController.php
+++ b/src/CoreBundle/Controller/AssetController.php
@@ -37,7 +37,7 @@ class AssetController
 
             $response = new StreamedResponse(
                 function () use ($stream): void {
-                    stream_copy_to_stream($stream, fopen('php://output', 'wb'));
+                    stream_copy_to_stream($stream, fopen('php://output', 'w'));
                 }
             );
             $disposition = $response->headers->makeDisposition(
diff --git a/src/CoreBundle/Controller/ResourceController.php b/src/CoreBundle/Controller/ResourceController.php
index bf48b4934d..96c3636401 100644
--- a/src/CoreBundle/Controller/ResourceController.php
+++ b/src/CoreBundle/Controller/ResourceController.php
@@ -606,7 +606,7 @@ class ResourceController extends AbstractResourceController implements CourseCon
         $qb->addCriteria($criteria);
         /** @var ArrayCollection|ResourceNode[] $children */
         $children = $qb->getQuery()->getResult();
-        $count = count($children);
+        $count = \count($children);
         if (0 === $count) {
             $params = $this->getResourceParams($request);
             $params['id'] = $id;
@@ -733,7 +733,7 @@ class ResourceController extends AbstractResourceController implements CourseCon
 
         $response = new StreamedResponse(
             function () use ($stream): void {
-                stream_copy_to_stream($stream, fopen('php://output', 'wb'));
+                stream_copy_to_stream($stream, fopen('php://output', 'w'));
             }
         );
         $disposition = $response->headers->makeDisposition(
diff --git a/src/CoreBundle/Controller/SessionController.php b/src/CoreBundle/Controller/SessionController.php
index a1096e346c..be285bbf5a 100644
--- a/src/CoreBundle/Controller/SessionController.php
+++ b/src/CoreBundle/Controller/SessionController.php
@@ -208,7 +208,7 @@ class SessionController extends AbstractController
         $redirectToSession = $redirectToSession ? '?s='.$sessionId : false;
 
         $coursesInThisSession = SessionManager::get_course_list_by_session_id($sessionId);
-        $coursesCount = count($coursesInThisSession);
+        $coursesCount = \count($coursesInThisSession);
         $redirectToSession = 1 === $coursesCount && $redirectToSession
             ? ($redirectToSession.'&cr='.array_values($coursesInThisSession)[0]['directory'])
             : $redirectToSession;
diff --git a/src/CoreBundle/Controller/UserController.php b/src/CoreBundle/Controller/UserController.php
index ac68d970a0..2b21b99d8f 100644
--- a/src/CoreBundle/Controller/UserController.php
+++ b/src/CoreBundle/Controller/UserController.php
@@ -28,7 +28,7 @@ class UserController extends AbstractController
     {
         $user = $userRepository->findByUsername($username);
 
-        if (!is_object($user) || !$user instanceof UserInterface) {
+        if (!\is_object($user) || !$user instanceof UserInterface) {
             throw $this->createAccessDeniedException('This user does not have access to this section');
         }
 
diff --git a/src/CoreBundle/Entity/Course.php b/src/CoreBundle/Entity/Course.php
index 90333582c2..6342f27a22 100644
--- a/src/CoreBundle/Entity/Course.php
+++ b/src/CoreBundle/Entity/Course.php
@@ -1015,7 +1015,7 @@ class Course extends AbstractResource implements ResourceInterface, ResourceWith
             self::OPEN_WORLD,
         ];
 
-        return in_array($this->visibility, $activeVisibilityList, true);
+        return \in_array($this->visibility, $activeVisibilityList, true);
     }
 
     /**
diff --git a/src/CoreBundle/Entity/Group.php b/src/CoreBundle/Entity/Group.php
index f69ee0873c..4397e6f564 100644
--- a/src/CoreBundle/Entity/Group.php
+++ b/src/CoreBundle/Entity/Group.php
@@ -71,7 +71,7 @@ class Group
 
     public function hasRole(string $role): bool
     {
-        return in_array(strtoupper($role), $this->roles, true);
+        return \in_array(strtoupper($role), $this->roles, true);
     }
 
     public function getRoles(): array
diff --git a/src/CoreBundle/Entity/Listener/ResourceListener.php b/src/CoreBundle/Entity/Listener/ResourceListener.php
index 93979cbb17..1a3e6a810c 100644
--- a/src/CoreBundle/Entity/Listener/ResourceListener.php
+++ b/src/CoreBundle/Entity/Listener/ResourceListener.php
@@ -76,7 +76,7 @@ class ResourceListener
 
     public function prePersist(AbstractResource $resource, LifecycleEventArgs $event)
     {
-        error_log('Resource listener prePersist for obj: '.get_class($resource));
+        error_log('Resource listener prePersist for obj: '.\get_class($resource));
         $em = $event->getEntityManager();
         $request = $this->request;
 
@@ -112,7 +112,7 @@ class ResourceListener
 
         // @todo use static table instead of Doctrine
         $repo = $em->getRepository(ResourceType::class);
-        $entityClass = get_class($event->getEntity());
+        $entityClass = \get_class($event->getEntity());
         $repoClass = str_replace('Entity', 'Repository', $entityClass).'Repository';
         if (strpos($repoClass, 'CoreBundle')) {
             $repoClass = str_replace('Entity', 'Repository\Node', $entityClass).'Repository';
diff --git a/src/CoreBundle/Entity/ResourceLink.php b/src/CoreBundle/Entity/ResourceLink.php
index f117de4bbe..7557f3226f 100644
--- a/src/CoreBundle/Entity/ResourceLink.php
+++ b/src/CoreBundle/Entity/ResourceLink.php
@@ -267,7 +267,7 @@ class ResourceLink
 
     public function setVisibility(int $visibility): self
     {
-        if (!in_array($visibility, self::getVisibilityList(), true)) {
+        if (!\in_array($visibility, self::getVisibilityList(), true)) {
             throw new LogicException('The visibility is not valid');
         }
 
diff --git a/src/CoreBundle/Entity/Session.php b/src/CoreBundle/Entity/Session.php
index af462d667e..8500f5e150 100644
--- a/src/CoreBundle/Entity/Session.php
+++ b/src/CoreBundle/Entity/Session.php
@@ -837,7 +837,7 @@ class Session
         $relCourse = $this->getCourseSubscription($course);
         if (null !== $relCourse) {
             $this->courses->removeElement($relCourse);
-            $this->setNbrCourses(count($this->courses));
+            $this->setNbrCourses(\count($this->courses));
 
             return true;
         }
diff --git a/src/CoreBundle/Entity/User.php b/src/CoreBundle/Entity/User.php
index 2478f164a5..5c4afeca47 100644
--- a/src/CoreBundle/Entity/User.php
+++ b/src/CoreBundle/Entity/User.php
@@ -1397,7 +1397,7 @@ class User implements UserInterface, EquatableInterface, ResourceInterface, Reso
 
     public function hasGroup(string $name): bool
     {
-        return in_array($name, $this->getGroupNames(), true);
+        return \in_array($name, $this->getGroupNames(), true);
     }
 
     public function getGroupNames(): array
@@ -1711,7 +1711,7 @@ class User implements UserInterface, EquatableInterface, ResourceInterface, Reso
 
     public function hasRole(string $role): bool
     {
-        return in_array(strtoupper($role), $this->getRoles(), true);
+        return \in_array(strtoupper($role), $this->getRoles(), true);
     }
 
     /**
@@ -1751,7 +1751,7 @@ class User implements UserInterface, EquatableInterface, ResourceInterface, Reso
             return $this;
         }
 
-        if (!in_array($role, $this->roles, true)) {
+        if (!\in_array($role, $this->roles, true)) {
             $this->roles[] = $role;
         }
 
diff --git a/src/CoreBundle/EventListener/CourseListener.php b/src/CoreBundle/EventListener/CourseListener.php
index 87d7dbbb60..8663ee3a4f 100644
--- a/src/CoreBundle/EventListener/CourseListener.php
+++ b/src/CoreBundle/EventListener/CourseListener.php
@@ -219,7 +219,7 @@ class CourseListener
     {
         $controllerList = $event->getController();
 
-        if (!is_array($controllerList)) {
+        if (!\is_array($controllerList)) {
             return;
         }
 
@@ -246,7 +246,7 @@ class CourseListener
         //$cidReset = $sessionHandler->get('cid_reset', false);
 
         // This controller implements ToolInterface? Then set the course/session
-        if (is_array($controllerList) &&
+        if (\is_array($controllerList) &&
             (
                 $controllerList[0] instanceof CourseControllerInterface ||
                 $controllerList[0] instanceof EditorController
diff --git a/src/CoreBundle/EventListener/LoginSuccessHandler.php b/src/CoreBundle/EventListener/LoginSuccessHandler.php
index 13b539d44a..619ea3d192 100644
--- a/src/CoreBundle/EventListener/LoginSuccessHandler.php
+++ b/src/CoreBundle/EventListener/LoginSuccessHandler.php
@@ -110,7 +110,7 @@ class LoginSuccessHandler
                 }
             }
 
-            $count_of_sessions = count($my_session_list);
+            $count_of_sessions = \count($my_session_list);
             if (1 === $count_of_sessions && 0 === $count_of_courses_no_sessions) {
                 $key = array_keys($personal_course_list);
                 $course_info = $personal_course_list[$key[0]]['course_info'];
diff --git a/src/CoreBundle/EventSubscriber/PaginationSubscriber.php b/src/CoreBundle/EventSubscriber/PaginationSubscriber.php
index 2a0f4eef63..3902600f1b 100644
--- a/src/CoreBundle/EventSubscriber/PaginationSubscriber.php
+++ b/src/CoreBundle/EventSubscriber/PaginationSubscriber.php
@@ -15,16 +15,16 @@ class PaginationSubscriber implements EventSubscriberInterface
 {
     public function items(ItemsEvent $event): void
     {
-        if (is_array($event->target)) {
+        if (\is_array($event->target)) {
             $event->items = $event->target;
-            $event->count = count($event->target);
+            $event->count = \count($event->target);
             $event->stopPropagation();
         }
     }
 
     public function pagination(PaginationEvent $event): void
     {
-        if (is_array($event->target)) {
+        if (\is_array($event->target)) {
             $event->setPagination(new SlidingPagination());
         }
 
diff --git a/src/CoreBundle/EventSubscriber/ResolveResourceFileContentUrlSubscriber.php b/src/CoreBundle/EventSubscriber/ResolveResourceFileContentUrlSubscriber.php
index 9b2b36dcd2..23c8582f64 100644
--- a/src/CoreBundle/EventSubscriber/ResolveResourceFileContentUrlSubscriber.php
+++ b/src/CoreBundle/EventSubscriber/ResolveResourceFileContentUrlSubscriber.php
@@ -47,7 +47,7 @@ class ResolveResourceFileContentUrlSubscriber implements EventSubscriberInterfac
 
         if (!($attributes = RequestAttributesExtractor::extractAttributes($request)) ||
             //!\is_a($attributes['resource_class'], ResourceFile::class, true)
-            !\is_a($attributes['resource_class'], AbstractResource::class, true)
+            !is_a($attributes['resource_class'], AbstractResource::class, true)
         ) {
             return;
         }
diff --git a/src/CoreBundle/Migrations/AbstractMigrationChamilo.php b/src/CoreBundle/Migrations/AbstractMigrationChamilo.php
index 785319bcc2..ece15055c7 100644
--- a/src/CoreBundle/Migrations/AbstractMigrationChamilo.php
+++ b/src/CoreBundle/Migrations/AbstractMigrationChamilo.php
@@ -143,7 +143,7 @@ abstract class AbstractMigrationChamilo extends AbstractMigration implements Con
 
         $this->getEntityManager()->persist($setting);
 
-        if (count($options) > 0) {
+        if (\count($options) > 0) {
             foreach ($options as $option) {
                 if (empty($option['text'])) {
                     if ('true' === $option['value']) {
@@ -198,7 +198,7 @@ abstract class AbstractMigrationChamilo extends AbstractMigration implements Con
         $description = ''
     ): void {
         if (!is_dir($filePath)) {
-            $class = get_class($resource);
+            $class = \get_class($resource);
             $documentPath = basename($filePath);
             if (file_exists($filePath)) {
                 $mimeType = mime_content_type($filePath);
diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20191206150030.php b/src/CoreBundle/Migrations/Schema/V200/Version20191206150030.php
index 248c447204..c4a38ed6fb 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20191206150030.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20191206150030.php
@@ -36,7 +36,7 @@ class Version20191206150030 extends AbstractMigrationChamilo
 
         /** @var ExtraFieldValues $item */
         foreach ($q->toIterable() as $item) {
-            if (in_array($item->getField()->getFieldType(), $fieldWithFiles, true)) {
+            if (\in_array($item->getField()->getFieldType(), $fieldWithFiles, true)) {
                 $path = $item->getValue();
                 if (empty($path)) {
                     continue;
diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20201212203625.php b/src/CoreBundle/Migrations/Schema/V200/Version20201212203625.php
index e3039dd95d..a6f70c1d02 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20201212203625.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20201212203625.php
@@ -75,12 +75,12 @@ final class Version20201212203625 extends AbstractMigrationChamilo
 
                 $resourceNode = null;
                 $parent = null;
-                if ('.' !== dirname($documentPath)) {
+                if ('.' !== \dirname($documentPath)) {
                     $parentId = DocumentManager::get_document_id(
                         [
                             'real_id' => $courseId,
                         ],
-                        dirname($documentPath)
+                        \dirname($documentPath)
                     );
                     $parent = $documentRepo->find($parentId);
                 }
diff --git a/src/CoreBundle/Repository/LegalRepository.php b/src/CoreBundle/Repository/LegalRepository.php
index 47dc54e9f8..48666077b4 100644
--- a/src/CoreBundle/Repository/LegalRepository.php
+++ b/src/CoreBundle/Repository/LegalRepository.php
@@ -33,7 +33,7 @@ class LegalRepository extends ServiceEntityRepository
             ->groupBy('l.languageId')
         ;
 
-        return count($qb->getQuery()->getResult());
+        return \count($qb->getQuery()->getResult());
     }
 
     /**
diff --git a/src/CoreBundle/Repository/Node/UserRepository.php b/src/CoreBundle/Repository/Node/UserRepository.php
index 9f7ae38b5a..5d0dac2114 100644
--- a/src/CoreBundle/Repository/Node/UserRepository.php
+++ b/src/CoreBundle/Repository/Node/UserRepository.php
@@ -1386,7 +1386,7 @@ class UserRepository extends ResourceRepository implements UserLoaderInterface,
                 'memberSince' => $callback,
             ],
             AbstractNormalizer::CIRCULAR_REFERENCE_HANDLER => function ($object, $format, $context) {
-                return get_class($object);
+                return \get_class($object);
             },
         ];
 
diff --git a/src/CoreBundle/Repository/ResourceRepository.php b/src/CoreBundle/Repository/ResourceRepository.php
index 5c51bcbfd9..47db04ddaa 100644
--- a/src/CoreBundle/Repository/ResourceRepository.php
+++ b/src/CoreBundle/Repository/ResourceRepository.php
@@ -714,7 +714,7 @@ abstract class ResourceRepository extends ServiceEntityRepository
         if ($resourceNode->hasResourceFile()) {
             $resourceNode->setContent($content);
             error_log('updated');
-            $resourceNode->getResourceFile()->setSize(strlen($content));
+            $resourceNode->getResourceFile()->setSize(\strlen($content));
             /*
             error_log('has file');
             $resourceFile = $resourceNode->getResourceFile();
@@ -797,7 +797,7 @@ abstract class ResourceRepository extends ServiceEntityRepository
             $slug = $this->slugify->slugify($resourceName);
         } else {
             $originalExtension = pathinfo($resourceName, PATHINFO_EXTENSION);
-            $originalBasename = \basename($resourceName, $originalExtension);
+            $originalBasename = basename($resourceName, $originalExtension);
             $slug = sprintf('%s.%s', $this->slugify->slugify($originalBasename), $originalExtension);
         }
 
diff --git a/src/CoreBundle/Repository/SequenceResourceRepository.php b/src/CoreBundle/Repository/SequenceResourceRepository.php
index bd187e3926..31ae37aa60 100644
--- a/src/CoreBundle/Repository/SequenceResourceRepository.php
+++ b/src/CoreBundle/Repository/SequenceResourceRepository.php
@@ -280,7 +280,7 @@ class SequenceResourceRepository extends ServiceEntityRepository
                         if (!$status) {
                             $sessionsInCourse = SessionManager::get_session_by_course($id);
                             foreach ($sessionsInCourse as $session) {
-                                if (in_array($session['id'], $sessionUserList, true)) {
+                                if (\in_array($session['id'], $sessionUserList, true)) {
                                     $status = $this->checkCourseRequirements($userId, $resource, $session['id']);
                                     if ($status) {
                                         break;
diff --git a/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php b/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php
index efc214d5ea..4db4fc59b3 100644
--- a/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php
+++ b/src/CoreBundle/Security/Authorization/Voter/CourseVoter.php
@@ -43,7 +43,7 @@ class CourseVoter extends Voter
         ];
 
         // if the attribute isn't one we support, return false
-        if (!in_array($attribute, $options, true)) {
+        if (!\in_array($attribute, $options, true)) {
             return false;
         }
         // only vote on Post objects inside this voter
diff --git a/src/CoreBundle/Security/Authorization/Voter/GroupVoter.php b/src/CoreBundle/Security/Authorization/Voter/GroupVoter.php
index 42cb44c0b1..1f2b3f10af 100644
--- a/src/CoreBundle/Security/Authorization/Voter/GroupVoter.php
+++ b/src/CoreBundle/Security/Authorization/Voter/GroupVoter.php
@@ -44,7 +44,7 @@ class GroupVoter extends Voter
             self::DELETE,
         ];
 
-        return $subject instanceof CGroup && in_array($attribute, $options, true);
+        return $subject instanceof CGroup && \in_array($attribute, $options, true);
     }
 
     protected function voteOnAttribute(string $attribute, $subject, TokenInterface $token): bool
diff --git a/src/CoreBundle/Security/Authorization/Voter/ResourceNodeVoter.php b/src/CoreBundle/Security/Authorization/Voter/ResourceNodeVoter.php
index 5ad8b365ff..aee20095cc 100644
--- a/src/CoreBundle/Security/Authorization/Voter/ResourceNodeVoter.php
+++ b/src/CoreBundle/Security/Authorization/Voter/ResourceNodeVoter.php
@@ -79,7 +79,7 @@ class ResourceNodeVoter extends Voter
 
         error_log('resourceNode supports');
         // if the attribute isn't one we support, return false
-        if (!in_array($attribute, $options, true)) {
+        if (!\in_array($attribute, $options, true)) {
             return false;
         }
         // only vote on ResourceNode objects inside this voter
diff --git a/src/CoreBundle/Security/Authorization/Voter/ResourceVoter.php b/src/CoreBundle/Security/Authorization/Voter/ResourceVoter.php
index 95b3eb39aa..e7645a0d4f 100644
--- a/src/CoreBundle/Security/Authorization/Voter/ResourceVoter.php
+++ b/src/CoreBundle/Security/Authorization/Voter/ResourceVoter.php
@@ -66,7 +66,7 @@ class ResourceVoter extends Voter
 
         //error_log('resource supports');
         // if the attribute isn't one we support, return false
-        if (!in_array($attribute, $options, true)) {
+        if (!\in_array($attribute, $options, true)) {
             return false;
         }
 
diff --git a/src/CoreBundle/Security/Authorization/Voter/SessionVoter.php b/src/CoreBundle/Security/Authorization/Voter/SessionVoter.php
index a88f82309e..c9e7d2f54f 100644
--- a/src/CoreBundle/Security/Authorization/Voter/SessionVoter.php
+++ b/src/CoreBundle/Security/Authorization/Voter/SessionVoter.php
@@ -53,7 +53,7 @@ class SessionVoter extends Voter
             self::DELETE,
         ];
 
-        return $subject instanceof Session && in_array($attribute, $options, true);
+        return $subject instanceof Session && \in_array($attribute, $options, true);
     }
 
     /**
@@ -159,7 +159,7 @@ class SessionVoter extends Voter
 
         // If there is a session duration but there is no previous
         // access by the user, then the session is still available
-        if (0 === count($courseAccess)) {
+        if (0 === \count($courseAccess)) {
             return true;
         }
 
diff --git a/src/CoreBundle/Settings/SettingsManager.php b/src/CoreBundle/Settings/SettingsManager.php
index 44fdee8dc7..c3442d61f9 100644
--- a/src/CoreBundle/Settings/SettingsManager.php
+++ b/src/CoreBundle/Settings/SettingsManager.php
@@ -193,7 +193,7 @@ class SettingsManager implements SettingsManagerInterface
                 $settings = new Settings();
                 $parameters = isset($all[$name]) ? $all[$name] : [];
                 foreach ($settingsBuilder->getTransformers() as $parameter => $transformer) {
-                    if (array_key_exists($parameter, $parameters)) {
+                    if (\array_key_exists($parameter, $parameters)) {
                         if ('course_creation_use_template' === $parameter) {
                             if (empty($parameters[$parameter])) {
                                 $parameters[$parameter] = null;
@@ -243,7 +243,7 @@ class SettingsManager implements SettingsManagerInterface
         }
 
         foreach ($settingsBuilder->getTransformers() as $parameter => $transformer) {
-            if (array_key_exists($parameter, $parameters)) {
+            if (\array_key_exists($parameter, $parameters)) {
                 if ('course_creation_use_template' === $parameter) {
                     if (empty($parameters[$parameter])) {
                         $parameters[$parameter] = null;
@@ -276,7 +276,7 @@ class SettingsManager implements SettingsManagerInterface
         // 3. Add transformer for that variable "ArrayToIdentifierTransformer"
         // 4. Here we recover the transformer and convert the array to string
         foreach ($settingsBuilder->getTransformers() as $parameter => $transformer) {
-            if (array_key_exists($parameter, $parameters)) {
+            if (\array_key_exists($parameter, $parameters)) {
                 $parameters[$parameter] = $transformer->transform($parameters[$parameter]);
             }
         }
@@ -344,7 +344,7 @@ class SettingsManager implements SettingsManagerInterface
         // 3. Add transformer for that variable "ArrayToIdentifierTransformer"
         // 4. Here we recover the transformer and convert the array to string
         foreach ($settingsBuilder->getTransformers() as $parameter => $transformer) {
-            if (array_key_exists($parameter, $parameters)) {
+            if (\array_key_exists($parameter, $parameters)) {
                 $parameters[$parameter] = $transformer->transform($parameters[$parameter]);
             }
         }
diff --git a/src/CoreBundle/ToolChain.php b/src/CoreBundle/ToolChain.php
index 052d261490..ea6d8fe24c 100644
--- a/src/CoreBundle/ToolChain.php
+++ b/src/CoreBundle/ToolChain.php
@@ -192,7 +192,7 @@ class ToolChain
 
         /** @var AbstractTool $tool */
         foreach ($tools as $tool) {
-            $visibility = in_array($tool->getName(), $toolVisibility, true);
+            $visibility = \in_array($tool->getName(), $toolVisibility, true);
             $criteria = [
                 'name' => $tool->getName(),
             ];
@@ -225,7 +225,7 @@ class ToolChain
     {
         $tools = $this->getTools();
 
-        if (array_key_exists($name, $tools)) {
+        if (\array_key_exists($name, $tools)) {
             return $tools[$name];
         }
 
diff --git a/src/CoreBundle/Transformer/ArrayToIdentifierTransformer.php b/src/CoreBundle/Transformer/ArrayToIdentifierTransformer.php
index 805d336673..0d67c9c83c 100644
--- a/src/CoreBundle/Transformer/ArrayToIdentifierTransformer.php
+++ b/src/CoreBundle/Transformer/ArrayToIdentifierTransformer.php
@@ -17,7 +17,7 @@ class ArrayToIdentifierTransformer implements DataTransformerInterface
 {
     public function transform($value)
     {
-        if (!is_array($value)) {
+        if (!\is_array($value)) {
             return '';
         }
 
diff --git a/src/CourseBundle/Entity/CQuiz.php b/src/CourseBundle/Entity/CQuiz.php
index 29c2e20ce2..ef906d5e25 100644
--- a/src/CourseBundle/Entity/CQuiz.php
+++ b/src/CourseBundle/Entity/CQuiz.php
@@ -774,7 +774,7 @@ class CQuiz extends AbstractResource implements ResourceInterface
         return $this->hideQuestionNumber;
     }
 
-    public function setHideQuestionNumber(int $hideQuestionNumber): CQuiz
+    public function setHideQuestionNumber(int $hideQuestionNumber): self
     {
         $this->hideQuestionNumber = $hideQuestionNumber;
 
diff --git a/src/CourseBundle/Entity/CShortcut.php b/src/CourseBundle/Entity/CShortcut.php
index b2001a682c..11e17099eb 100644
--- a/src/CourseBundle/Entity/CShortcut.php
+++ b/src/CourseBundle/Entity/CShortcut.php
@@ -42,8 +42,8 @@ class CShortcut extends AbstractResource implements ResourceInterface
     protected ResourceNode $shortCutNode;
 
     /**
-    * @Groups({"cshortcut:read"})
-    */
+     * @Groups({"cshortcut:read"})
+     */
     protected string $url;
 
     /**
@@ -68,8 +68,7 @@ class CShortcut extends AbstractResource implements ResourceInterface
 
     public function getUrl()
     {
-        return
-            '/r/'.$this->getShortCutNode()->getResourceType()->getTool()->getName().
+        return '/r/'.$this->getShortCutNode()->getResourceType()->getTool()->getName().
             '/'.$this->getShortCutNode()->getResourceType()->getName().
             '/'.$this->getShortCutNode()->getId().
             '/link';
diff --git a/src/CourseBundle/Settings/SettingsCourseManager.php b/src/CourseBundle/Settings/SettingsCourseManager.php
index 285ae0b61a..57c75f5c9c 100644
--- a/src/CourseBundle/Settings/SettingsCourseManager.php
+++ b/src/CourseBundle/Settings/SettingsCourseManager.php
@@ -60,7 +60,7 @@ class SettingsCourseManager extends SettingsManager
         }
 
         foreach ($settingsBuilder->getTransformers() as $parameter => $transformer) {
-            if (array_key_exists($parameter, $parameters)) {
+            if (\array_key_exists($parameter, $parameters)) {
                 $parameters[$parameter] = $transformer->reverseTransform($parameters[$parameter]);
             }
         }
@@ -88,7 +88,7 @@ class SettingsCourseManager extends SettingsManager
         // 3. Add transformer for that variable "ArrayToIdentifierTransformer"
         // 4. Here we recover the transformer and convert the array to string
         foreach ($settingsBuilder->getTransformers() as $parameter => $transformer) {
-            if (array_key_exists($parameter, $parameters)) {
+            if (\array_key_exists($parameter, $parameters)) {
                 $parameters[$parameter] = $transformer->transform($parameters[$parameter]);
             }
         }