fix: Apply new coding standard to all files

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/admin_audit/lib/AuditLogger.php

 		$this->parentLogger = $logFactory->getCustomPsrLogger($logFile, $auditType, $auditTag);
 	}
 
-	public function emergency($message, array $context = array()): void {
+	public function emergency($message, array $context = []): void {
 		$this->parentLogger->emergency($message, $context);
 	}
 
-	public function alert($message, array $context = array()): void {
+	public function alert($message, array $context = []): void {
 		$this->parentLogger->alert($message, $context);
 	}
 
-	public function critical($message, array $context = array()): void {
+	public function critical($message, array $context = []): void {
 		$this->parentLogger->critical($message, $context);
 	}
 
-	public function error($message, array $context = array()): void {
+	public function error($message, array $context = []): void {
 		$this->parentLogger->error($message, $context);
 	}
 
-	public function warning($message, array $context = array()): void {
+	public function warning($message, array $context = []): void {
 		$this->parentLogger->warning($message, $context);
 	}
 
-	public function notice($message, array $context = array()): void {
+	public function notice($message, array $context = []): void {
 		$this->parentLogger->notice($message, $context);
 	}
 
-	public function info($message, array $context = array()): void {
+	public function info($message, array $context = []): void {
 		$this->parentLogger->info($message, $context);
 	}
 
-	public function debug($message, array $context = array()): void {
+	public function debug($message, array $context = []): void {
 		$this->parentLogger->debug($message, $context);
 	}
 
-	public function log($level, $message, array $context = array()): void {
+	public function log($level, $message, array $context = []): void {
 		$this->parentLogger->log($level, $message, $context);
 	}
 }

apps/cloud_federation_api/lib/Capabilities.php

 		$this->provider->setApiVersion(self::API_VERSION);
 
 		$pos = strrpos($url, '/');
-		if (false === $pos) {
+		if ($pos === false) {
 			throw new OCMArgumentException('generated route should contains a slash character');
 		}
 

apps/comments/lib/Activity/Provider.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null): IEvent {
 		if ($event->getApp() !== 'comments') {
 			throw new \InvalidArgumentException();
 		}

apps/contactsinteraction/tests/Db/RecentContactMapperTest.php

 		$this->assertCount(0, $this->recentContactMapper->findAll('admin'));
 	}
 
-	protected function createRecentContact(string $email = null, string $federatedCloudId = null): RecentContact {
+	protected function createRecentContact(?string $email = null, ?string $federatedCloudId = null): RecentContact {
 		$props = [
 			'URI' => UUIDUtil::getUUID(),
 			'FN' => 'Foo Bar',

apps/dav/appinfo/v2/direct.php

  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  *
  */
-use \OCA\DAV\Direct\ServerFactory;
+use OCA\DAV\Direct\ServerFactory;
 
 // no php execution timeout for webdav
 if (!str_contains(@ini_get('disable_functions'), 'set_time_limit')) {

apps/dav/lib/CalDAV/Activity/Provider/Calendar.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar') {
 			throw new \InvalidArgumentException();
 		}

apps/dav/lib/CalDAV/Activity/Provider/Event.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar_event') {
 			throw new \InvalidArgumentException();
 		}

apps/dav/lib/CalDAV/Activity/Provider/Todo.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar_todo') {
 			throw new \InvalidArgumentException();
 		}

apps/dav/lib/CalDAV/BirthdayService.php

 	 */
 	private function formatTitle(string $field,
 		string $name,
-		int $year = null,
+		?int $year = null,
 		bool $supports4Byte = true):string {
 		if ($supports4Byte) {
 			switch ($field) {

apps/dav/lib/CalDAV/CalDavBackend.php

 				->andWhere($searchOr)
 				->andWhere($calendarObjectIdQuery->expr()->isNull('deleted_at'));
 
-			if ('' !== $pattern) {
+			if ($pattern !== '') {
 				if (!$escapePattern) {
 					$calendarObjectIdQuery->andWhere($calendarObjectIdQuery->expr()->ilike('cob.value', $calendarObjectIdQuery->createNamedParameter($pattern)));
 				} else {

apps/dav/lib/CalDAV/Reminder/ReminderService.php

 	private function getRemindersForVAlarm(VAlarm $valarm,
 		array $objectData,
 		DateTimeZone $calendarTimeZone,
-		string $eventHash = null,
-		string $alarmHash = null,
+		?string $eventHash = null,
+		?string $alarmHash = null,
 		bool $isRecurring = false,
 		bool $isRecurrenceException = false):array {
 		if ($eventHash === null) {

apps/dav/lib/CalDAV/Schedule/Plugin.php

 use Sabre\VObject\Parameter;
 use Sabre\VObject\Property;
 use Sabre\VObject\Reader;
-use function \Sabre\Uri\split;
+use function Sabre\Uri\split;
 
 class Plugin extends \Sabre\CalDAV\Schedule\Plugin {
 
 	 * @param Property|null $attendee
 	 * @return bool
 	 */
-	private function getAttendeeRSVP(Property $attendee = null):bool {
+	private function getAttendeeRSVP(?Property $attendee = null):bool {
 		if ($attendee !== null) {
 			$rsvp = $attendee->offsetGet('RSVP');
 			if (($rsvp instanceof Parameter) && (strcasecmp($rsvp->getValue(), 'TRUE') === 0)) {

apps/dav/lib/CalDAV/Status/StatusService.php

 			}
 
 			$sct = $calendarObject->getSchedulingTransparency();
-			if ($sct !== null && ScheduleCalendarTransp::TRANSPARENT == strtolower($sct->getValue())) {
+			if ($sct !== null && strtolower($sct->getValue()) == ScheduleCalendarTransp::TRANSPARENT) {
 				// If a calendar is marked as 'transparent', it means we must
 				// ignore it for free-busy purposes.
 				continue;

apps/dav/lib/CardDAV/Activity/Provider/Addressbook.php

 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null): IEvent {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'contacts') {
 			throw new \InvalidArgumentException();
 		}

apps/dav/lib/CardDAV/Activity/Provider/Card.php

 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null): IEvent {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'contacts') {
 			throw new \InvalidArgumentException();
 		}

apps/dav/lib/CardDAV/CardDavBackend.php

 			->andWhere($query2->expr()->in('cp.name', $query2->createNamedParameter($searchProperties, IQueryBuilder::PARAM_STR_ARRAY)));
 
 		// No need for like when the pattern is empty
-		if ('' !== $pattern) {
+		if ($pattern !== '') {
 			if (!$useWildcards) {
 				$query2->andWhere($query2->expr()->eq('cp.value', $query2->createNamedParameter($pattern)));
 			} elseif (!$escapePattern) {

apps/dav/lib/CardDAV/SyncService.php

 		return $this->localSystemAddressBook;
 	}
 
-	public function syncInstance(\Closure $progressCallback = null) {
+	public function syncInstance(?\Closure $progressCallback = null) {
 		$systemAddressBook = $this->getLocalSystemAddressBook();
 		$this->userManager->callForAllUsers(function ($user) use ($systemAddressBook, $progressCallback) {
 			$this->updateUser($user);

apps/dav/lib/Command/MoveCalendar.php

 
 		$calendar = $this->calDav->getCalendarByUri(self::URI_USERS . $userOrigin, $name);
 
-		if (null === $calendar) {
+		if ($calendar === null) {
 			throw new \InvalidArgumentException("User <$userOrigin> has no calendar named <$name>. You can run occ dav:list-calendars to list calendars URIs for this user.");
 		}
 
 	 * Check if the calendar exists for user
 	 */
 	protected function calendarExists(string $userDestination, string $name): bool {
-		return null !== $this->calDav->getCalendarByUri(self::URI_USERS . $userDestination, $name);
+		return $this->calDav->getCalendarByUri(self::URI_USERS . $userDestination, $name) !== null;
 	}
 
 	/**
 			 * Check that user destination is member of the groups which whom the calendar was shared
 			 * If we ask to force the migration, the share with the group is dropped
 			 */
-			if ($this->shareManager->shareWithGroupMembersOnly() === true && 'groups' === $prefix && !$this->groupManager->isInGroup($userDestination, $userOrGroup)) {
+			if ($this->shareManager->shareWithGroupMembersOnly() === true && $prefix === 'groups' && !$this->groupManager->isInGroup($userDestination, $userOrGroup)) {
 				if ($force) {
 					$this->calDav->updateShares(new Calendar($this->calDav, $calendar, $this->l10n, $this->config, $this->logger), [], ['principal:principals/groups/' . $userOrGroup]);
 				} else {

apps/dav/lib/Comments/EntityCollection.php

 	 * @param \DateTime|null $datetime
 	 * @return CommentNode[]
 	 */
-	public function findChildren($limit = 0, $offset = 0, \DateTime $datetime = null) {
+	public function findChildren($limit = 0, $offset = 0, ?\DateTime $datetime = null) {
 		$comments = $this->commentsManager->getForObject($this->name, $this->id, $limit, $offset, $datetime);
 		$result = [];
 		foreach ($comments as $comment) {

apps/dav/lib/Connector/Sabre/CachingTree.php

 		$path = trim($path, '/');
 		foreach ($this->cache as $nodePath => $node) {
 			$nodePath = (string) $nodePath;
-			if ('' === $path || $nodePath == $path || str_starts_with($nodePath, $path . '/')) {
+			if ($path === '' || $nodePath == $path || str_starts_with($nodePath, $path . '/')) {
 				unset($this->cache[$nodePath]);
 			}
 		}

apps/dav/lib/Connector/Sabre/Directory.php

 	/**
 	 * Sets up the node, expects a full path name
 	 */
-	public function __construct(View $view, FileInfo $info, ?CachingTree $tree = null, IShareManager $shareManager = null) {
+	public function __construct(View $view, FileInfo $info, ?CachingTree $tree = null, ?IShareManager $shareManager = null) {
 		parent::__construct($view, $info, $shareManager);
 		$this->tree = $tree;
 	}
 	 * @throws \Sabre\DAV\Exception\NotFound
 	 * @throws \Sabre\DAV\Exception\ServiceUnavailable
 	 */
-	public function getChild($name, $info = null, IRequest $request = null, IL10N $l10n = null) {
+	public function getChild($name, $info = null, ?IRequest $request = null, ?IL10N $l10n = null) {
 		if (!$this->info->isReadable()) {
 			// avoid detecting files through this way
 			throw new NotFound();

apps/dav/lib/Connector/Sabre/Exception/FileLocked.php

 use Exception;
 
 class FileLocked extends \Sabre\DAV\Exception {
-	public function __construct($message = "", $code = 0, Exception $previous = null) {
+	public function __construct($message = "", $code = 0, ?Exception $previous = null) {
 		if ($previous instanceof \OCP\Files\LockNotAcquiredException) {
 			$message = sprintf('Target file %s is locked by another process.', $previous->path);
 		}

apps/dav/lib/Connector/Sabre/Exception/Forbidden.php

 	 * @param bool $retry
 	 * @param \Exception $previous
 	 */
-	public function __construct($message, $retry = false, \Exception $previous = null) {
+	public function __construct($message, $retry = false, ?\Exception $previous = null) {
 		parent::__construct($message, 0, $previous);
 		$this->retry = $retry;
 	}

apps/dav/lib/Connector/Sabre/Exception/InvalidPath.php

 	 * @param bool $retry
 	 * @param \Exception|null $previous
 	 */
-	public function __construct($message, $retry = false, \Exception $previous = null) {
+	public function __construct($message, $retry = false, ?\Exception $previous = null) {
 		parent::__construct($message, 0, $previous);
 		$this->retry = $retry;
 	}

apps/dav/lib/Connector/Sabre/File.php

 	 * @param ?IRequest $request
 	 * @param ?IL10N $l10n
 	 */
-	public function __construct(View $view, FileInfo $info, IManager $shareManager = null, IRequest $request = null, IL10N $l10n = null) {
+	public function __construct(View $view, FileInfo $info, ?IManager $shareManager = null, ?IRequest $request = null, ?IL10N $l10n = null) {
 		parent::__construct($view, $info, $shareManager);
 
 		if ($l10n) {

apps/dav/lib/Connector/Sabre/FilesPlugin.php

 	 */
 	private function handleUpdatePropertiesMetadata(PropPatch $propPatch, Node $node): void {
 		$userId = $this->userSession->getUser()?->getUID();
-		if (null === $userId) {
+		if ($userId === null) {
 			return;
 		}
 
 	 * @param \Sabre\DAV\INode $node
 	 * @throws \Sabre\DAV\Exception\BadRequest
 	 */
-	public function sendFileIdHeader($filePath, \Sabre\DAV\INode $node = null) {
+	public function sendFileIdHeader($filePath, ?\Sabre\DAV\INode $node = null) {
 		// chunked upload handling
 		if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
 			[$path, $name] = \Sabre\Uri\split($filePath);

apps/dav/lib/Connector/Sabre/Node.php

 	/**
 	 * Sets up the node, expects a full path name
 	 */
-	public function __construct(View $view, FileInfo $info, IManager $shareManager = null) {
+	public function __construct(View $view, FileInfo $info, ?IManager $shareManager = null) {
 		$this->fileView = $view;
 		$this->path = $this->fileView->getRelativePath($info->getPath());
 		$this->info = $info;

apps/dav/lib/DAV/Sharing/Xml/Invite.php

 	 *
 	 * @param array $users
 	 */
-	public function __construct(array $users, array $organizer = null) {
+	public function __construct(array $users, ?array $organizer = null) {
 		$this->users = $users;
 		$this->organizer = $organizer;
 	}

apps/dav/lib/HookManager.php

 		}
 	}
 
-	public function firstLogin(IUser $user = null) {
+	public function firstLogin(?IUser $user = null) {
 		if (!is_null($user)) {
 			$principal = 'principals/users/' . $user->getUID();
 			if ($this->calDav->getCalendarsForUserCount($principal) === 0) {

apps/dav/tests/unit/CalDAV/Reminder/NotificationProvider/EmailProviderTest.php

 	 * @param array|null $replyTo
 	 * @return IMessage
 	 */
-	private function getMessageMock(string $toMail, IEMailTemplate $templateMock, array $replyTo = null):IMessage {
+	private function getMessageMock(string $toMail, IEMailTemplate $templateMock, ?array $replyTo = null):IMessage {
 		$message = $this->createMock(IMessage::class);
 		$i = 0;
 

apps/dav/tests/unit/CardDAV/CardDavBackendTest.php

 	public const UNIT_TEST_GROUP = 'principals/groups/carddav-unit-test-group';
 
 	private $vcardTest0 = 'BEGIN:VCARD'.PHP_EOL.
-						 'VERSION:3.0'.PHP_EOL.
-						 'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
-						 'UID:Test'.PHP_EOL.
-						 'FN:Test'.PHP_EOL.
-						 'N:Test;;;;'.PHP_EOL.
-						 'END:VCARD';
+		'VERSION:3.0'.PHP_EOL.
+		'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
+		'UID:Test'.PHP_EOL.
+		'FN:Test'.PHP_EOL.
+		'N:Test;;;;'.PHP_EOL.
+		'END:VCARD';
 
 	private $vcardTest1 = 'BEGIN:VCARD'.PHP_EOL.
-						'VERSION:3.0'.PHP_EOL.
-						'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
-						'UID:Test2'.PHP_EOL.
-						'FN:Test2'.PHP_EOL.
-						'N:Test2;;;;'.PHP_EOL.
-						'END:VCARD';
+		'VERSION:3.0'.PHP_EOL.
+		'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
+		'UID:Test2'.PHP_EOL.
+		'FN:Test2'.PHP_EOL.
+		'N:Test2;;;;'.PHP_EOL.
+		'END:VCARD';
 
 	private $vcardTest2 = 'BEGIN:VCARD'.PHP_EOL.
-						'VERSION:3.0'.PHP_EOL.
-						'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
-						'UID:Test3'.PHP_EOL.
-						'FN:Test3'.PHP_EOL.
-						'N:Test3;;;;'.PHP_EOL.
-						'END:VCARD';
+		'VERSION:3.0'.PHP_EOL.
+		'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
+		'UID:Test3'.PHP_EOL.
+		'FN:Test3'.PHP_EOL.
+		'N:Test3;;;;'.PHP_EOL.
+		'END:VCARD';
 
 	private $vcardTestNoUID = 'BEGIN:VCARD'.PHP_EOL.
-						'VERSION:3.0'.PHP_EOL.
-						'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
-						'FN:TestNoUID'.PHP_EOL.
-						'N:TestNoUID;;;;'.PHP_EOL.
-						'END:VCARD';
+		'VERSION:3.0'.PHP_EOL.
+		'PRODID:-//Sabre//Sabre VObject 4.1.2//EN'.PHP_EOL.
+		'FN:TestNoUID'.PHP_EOL.
+		'N:TestNoUID;;;;'.PHP_EOL.
+		'END:VCARD';
 
 	protected function setUp(): void {
 		parent::setUp();

apps/dav/tests/unit/Connector/Sabre/FileTest.php

 	 *
 	 * @return null|string of the PUT operation which is usually the etag
 	 */
-	private function doPut($path, $viewRoot = null, Request $request = null) {
+	private function doPut($path, $viewRoot = null, ?Request $request = null) {
 		$view = \OC\Files\Filesystem::getView();
 		if (!is_null($viewRoot)) {
 			$view = new \OC\Files\View($viewRoot);
 	 *
 	 * @return array list of part files
 	 */
-	private function listPartFiles(\OC\Files\View $userView = null, $path = '') {
+	private function listPartFiles(?\OC\Files\View $userView = null, $path = '') {
 		if ($userView === null) {
 			$userView = \OC\Files\Filesystem::getView();
 		}
 	 * @param View $userView
 	 * @return array
 	 */
-	private function getFileInfos($path = '', View $userView = null) {
+	private function getFileInfos($path = '', ?View $userView = null) {
 		if ($userView === null) {
 			$userView = Filesystem::getView();
 		}

apps/dav/tests/unit/Files/MultipartRequestParserTest.php

 
 namespace OCA\DAV\Tests\unit\DAV;
 
-use \OCA\DAV\BulkUpload\MultipartRequestParser;
+use OCA\DAV\BulkUpload\MultipartRequestParser;
 use Psr\Log\LoggerInterface;
 use Test\TestCase;
 

apps/encryption/lib/Hooks/UserHooks.php

 				$this->logger->error('Encryption could not update users encryption password');
 			}
 
-		// NOTE: Session does not need to be updated as the
-		// private key has not changed, only the passphrase
-		// used to decrypt it has changed
+			// NOTE: Session does not need to be updated as the
+			// private key has not changed, only the passphrase
+			// used to decrypt it has changed
 		} else { // admin changed the password for a different user, create new keys and re-encrypt file keys
 			$userId = $params['uid'];
 			$this->initMountPoints($userId);

apps/files/lib/Activity/FavoriteProvider.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files' || $event->getType() !== 'favorite') {
 			throw new \InvalidArgumentException();
 		}
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseLongVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getSubject() === self::SUBJECT_ADDED) {
 			$subject = $this->l->t('You added {file} to your favorites');
 			if ($this->activityManager->getRequirePNG()) {

apps/files/lib/Activity/Provider.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files') {
 			throw new \InvalidArgumentException();
 		}
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseShortVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseShortVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		$parsedParameters = $this->getParameters($event);
 
 		if ($event->getSubject() === 'created_by') {
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseLongVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		$this->fileIsEncrypted = false;
 		$parsedParameters = $this->getParameters($event);
 
 	 * @return array
 	 * @throws \InvalidArgumentException
 	 */
-	protected function getFile($parameter, IEvent $event = null) {
+	protected function getFile($parameter, ?IEvent $event = null) {
 		if (is_array($parameter)) {
 			$path = reset($parameter);
 			$id = (string) key($parameter);

apps/files/lib/Collaboration/Resources/ResourceProvider.php

 	 * @return bool
 	 * @since 16.0.0
 	 */
-	public function canAccessResource(IResource $resource, IUser $user = null): bool {
+	public function canAccessResource(IResource $resource, ?IUser $user = null): bool {
 		if (!$user instanceof IUser) {
 			return false;
 		}

apps/files/lib/Controller/DirectEditingController.php

 	 * 200: URL for direct editing returned
 	 * 403: Opening file is not allowed
 	 */
-	public function create(string $path, string $editorId, string $creatorId, string $templateId = null): DataResponse {
+	public function create(string $path, string $editorId, string $creatorId, ?string $templateId = null): DataResponse {
 		if (!$this->directEditingManager->isEnabled()) {
 			return new DataResponse(['message' => 'Direct editing is not enabled'], Http::STATUS_INTERNAL_SERVER_ERROR);
 		}
 	 * 200: URL for direct editing returned
 	 * 403: Opening file is not allowed
 	 */
-	public function open(string $path, string $editorId = null, ?int $fileId = null): DataResponse {
+	public function open(string $path, ?string $editorId = null, ?int $fileId = null): DataResponse {
 		if (!$this->directEditingManager->isEnabled()) {
 			return new DataResponse(['message' => 'Direct editing is not enabled'], Http::STATUS_INTERNAL_SERVER_ERROR);
 		}

apps/files/lib/Controller/ViewController.php

 	 * @param string $fileid
 	 * @return TemplateResponse|RedirectResponse
 	 */
-	public function showFile(string $fileid = null): Response {
+	public function showFile(?string $fileid = null): Response {
 		if (!$fileid) {
 			return new RedirectResponse($this->urlGenerator->linkToRoute('files.view.index'));
 		}

apps/files_external/lib/Lib/Auth/Password/GlobalAuth.php

 		]);
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		if ($storage->getType() === StorageConfig::MOUNT_TYPE_ADMIN) {
 			$uid = '';
 		} elseif (is_null($user)) {

apps/files_external/lib/Lib/Auth/Password/LoginCredentials.php

 		return $credentials;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		if (!isset($user)) {
 			throw new InsufficientDataForMeaningfulAnswerException('No login credentials saved');
 		}

apps/files_external/lib/Lib/Auth/Password/SessionCredentials.php

 			->addParameters([]);
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		try {
 			$credentials = $this->credentialsStore->getLoginCredentials();
 		} catch (CredentialsUnavailableException $e) {

apps/files_external/lib/Lib/Auth/Password/UserGlobalAuth.php

 		$this->credentialsManager->store($user->getUID(), self::CREDENTIALS_IDENTIFIER, $credentials);
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		if ($user === null) {
 			throw new InsufficientDataForMeaningfulAnswerException('No credentials saved');
 		}

apps/files_external/lib/Lib/Auth/Password/UserProvided.php

 		]);
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		if (!isset($user)) {
 			throw new InsufficientDataForMeaningfulAnswerException('No credentials saved');
 		}

apps/files_external/lib/Lib/Auth/PublicKey/RSA.php

 		;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$auth = new RSACrypt();
 		$auth->setPassword($this->config->getSystemValue('secret', ''));
 		if (!$auth->loadKey($storage->getBackendOption('private_key'))) {

apps/files_external/lib/Lib/Auth/PublicKey/RSAPrivateKey.php

 			]);
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$auth = new RSACrypt();
 		$auth->setPassword($this->config->getSystemValue('secret', ''));
 		if (!$auth->loadKey($storage->getBackendOption('private_key'))) {

apps/files_external/lib/Lib/Backend/InvalidBackend.php

 		return $this->invalidId;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$storage->setBackendOption('exception', new \Exception('Unknown storage backend "' . $this->invalidId . '"', StorageNotAvailableException::STATUS_ERROR));
 	}
 }

apps/files_external/lib/Lib/Backend/Local.php

 		;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null): void {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null): void {
 		$storage->setBackendOption('isExternal', true);
 	}
 }

apps/files_external/lib/Lib/Backend/SMB.php

 			->setLegacyAuthMechanism($legacyAuth);
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$auth = $storage->getAuthMechanism();
 		if ($auth->getScheme() === AuthMechanism::SCHEME_PASSWORD) {
 			if (!is_string($storage->getBackendOption('user')) || !is_string($storage->getBackendOption('password'))) {

apps/files_external/lib/Lib/Backend/SMB_OC.php

 		;
 	}
 
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 		$username_as_share = ($storage->getBackendOption('username_as_share') === true);
 
 		if ($username_as_share) {

apps/files_external/lib/Lib/InsufficientDataForMeaningfulAnswerException.php

 	 * @param \Exception|null $previous
 	 * @since 6.0.0
 	 */
-	public function __construct($message = '', $code = self::STATUS_INDETERMINATE, \Exception $previous = null) {
+	public function __construct($message = '', $code = self::STATUS_INDETERMINATE, ?\Exception $previous = null) {
 		parent::__construct($message, $code, $previous);
 	}
 }

apps/files_external/lib/Lib/Storage/FTP.php

 		return false;
 	}
 
-	public function writeStream(string $path, $stream, int $size = null): int {
+	public function writeStream(string $path, $stream, ?int $size = null): int {
 		if ($size === null) {
 			$stream = CountWrapper::wrap($stream, function ($writtenSize) use (&$size) {
 				$size = $writtenSize;

apps/files_external/lib/Lib/Storage/SFTP.php

 		}
 	}
 
-	public function writeStream(string $path, $stream, int $size = null): int {
+	public function writeStream(string $path, $stream, ?int $size = null): int {
 		if ($size === null) {
 			$stream = CountWrapper::wrap($stream, function (int $writtenSize) use (&$size) {
 				$size = $writtenSize;

apps/files_external/lib/Lib/StorageModifierTrait.php

 	 * @throws InsufficientDataForMeaningfulAnswerException
 	 * @throws StorageNotAvailableException
 	 */
-	public function manipulateStorageConfig(StorageConfig &$storage, IUser $user = null) {
+	public function manipulateStorageConfig(StorageConfig &$storage, ?IUser $user = null) {
 	}
 
 	/**

apps/files_external/lib/MountConfig.php

 	 * @throws \OCP\AppFramework\QueryException
 	 * @since 16.0.0
 	 */
-	public static function substitutePlaceholdersInConfig($input, string $userId = null) {
+	public static function substitutePlaceholdersInConfig($input, ?string $userId = null) {
 		/** @var BackendService $backendService */
 		$backendService = \OC::$server->get(BackendService::class);
 		/** @var IConfigHandler[] $handlers */

apps/files_external/lib/Service/UserGlobalStoragesService.php

 	 * @param IUser|null $user user to get the storages for, if not set the currently logged in user will be used
 	 * @return StorageConfig[] array of storage configs
 	 */
-	public function getAllStoragesForUser(IUser $user = null) {
+	public function getAllStoragesForUser(?IUser $user = null) {
 		if (is_null($user)) {
 			$user = $this->getUser();
 		}

apps/files_external/templates/settings.php

 <?php
-use \OCA\Files_External\Lib\Auth\AuthMechanism;
-use \OCA\Files_External\Lib\Backend\Backend;
-use \OCA\Files_External\Lib\DefinitionParameter;
-use \OCA\Files_External\Service\BackendService;
+use OCA\Files_External\Lib\Auth\AuthMechanism;
+use OCA\Files_External\Lib\Backend\Backend;
+use OCA\Files_External\Lib\DefinitionParameter;
+use OCA\Files_External\Service\BackendService;
 
 /** @var array $_ */
 

apps/files_sharing/lib/Activity/Providers/Base.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files_sharing') {
 			throw new \InvalidArgumentException();
 		}
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	abstract protected function parseLongVersion(IEvent $event, IEvent $previousEvent = null);
+	abstract protected function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null);
 
 	/**
 	 * @throws \InvalidArgumentException
 	 * @return array
 	 * @throws \InvalidArgumentException
 	 */
-	protected function getFile($parameter, IEvent $event = null) {
+	protected function getFile($parameter, ?IEvent $event = null) {
 		if (is_array($parameter)) {
 			$path = reset($parameter);
 			$id = (string) key($parameter);

apps/files_sharing/lib/Activity/Providers/Downloads.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseLongVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		$parsedParameters = $this->getParsedParameters($event);
 
 		if ($event->getSubject() === self::SUBJECT_PUBLIC_SHARED_FILE_DOWNLOADED ||

apps/files_sharing/lib/Activity/Providers/Groups.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseLongVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		$parsedParameters = $this->getParsedParameters($event);
 
 		if ($event->getSubject() === self::SUBJECT_SHARED_GROUP_SELF) {

apps/files_sharing/lib/Activity/Providers/PublicLinks.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseLongVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		$parsedParameters = $this->getParsedParameters($event);
 
 		if ($event->getSubject() === self::SUBJECT_SHARED_LINK_SELF) {

apps/files_sharing/lib/Activity/Providers/RemoteShares.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseLongVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		$parsedParameters = $this->getParsedParameters($event);
 
 		if ($event->getSubject() === self::SUBJECT_REMOTE_SHARE_RECEIVED) {

apps/files_sharing/lib/Activity/Providers/Users.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parseLongVersion(IEvent $event, IEvent $previousEvent = null) {
+	public function parseLongVersion(IEvent $event, ?IEvent $previousEvent = null) {
 		$parsedParameters = $this->getParsedParameters($event);
 
 		if ($event->getSubject() === self::SUBJECT_SHARED_USER_SELF) {

apps/files_sharing/lib/Controller/ShareAPIController.php

 		IUserManager $userManager,
 		IRootFolder $rootFolder,
 		IURLGenerator $urlGenerator,
-		string $userId = null,
+		?string $userId = null,
 		IL10N $l10n,
 		IConfig $config,
 		IAppManager $appManager,
 	 *
 	 * @suppress PhanUndeclaredClassMethod
 	 */
-	protected function formatShare(IShare $share, Node $recipientNode = null): array {
+	protected function formatShare(IShare $share, ?Node $recipientNode = null): array {
 		$sharedBy = $this->userManager->get($share->getSharedBy());
 		$shareOwner = $this->userManager->get($share->getShareOwner());
 
 	 * 200: Share created
 	 */
 	public function createShare(
-		string $path = null,
-		int $permissions = null,
+		?string $path = null,
+		?int $permissions = null,
 		int $shareType = -1,
-		string $shareWith = null,
+		?string $shareWith = null,
 		string $publicUpload = 'false',
 		string $password = '',
-		string $sendPasswordByTalk = null,
+		?string $sendPasswordByTalk = null,
 		string $expireDate = '',
 		string $note = '',
 		string $label = '',
-		string $attributes = null
+		?string $attributes = null
 	): DataResponse {
 		$share = $this->shareManager->newShare();
 
 	 */
 	public function updateShare(
 		string $id,
-		int $permissions = null,
-		string $password = null,
-		string $sendPasswordByTalk = null,
-		string $publicUpload = null,
-		string $expireDate = null,
-		string $note = null,
-		string $label = null,
-		string $hideDownload = null,
-		string $attributes = null
+		?int $permissions = null,
+		?string $password = null,
+		?string $sendPasswordByTalk = null,
+		?string $publicUpload = null,
+		?string $expireDate = null,
+		?string $note = null,
+		?string $label = null,
+		?string $hideDownload = null,
+		?string $attributes = null
 	): DataResponse {
 		try {
 			$share = $this->getShareById($id);

apps/files_sharing/lib/Controller/ShareesAPIController.php

 	 *
 	 * 200: Sharees search result returned
 	 */
-	public function search(string $search = '', string $itemType = null, int $page = 1, int $perPage = 200, $shareType = null, bool $lookup = false): DataResponse {
+	public function search(string $search = '', ?string $itemType = null, int $page = 1, int $perPage = 200, $shareType = null, bool $lookup = false): DataResponse {
 
 		// only search for string larger than a given threshold
 		$threshold = $this->config->getSystemValueInt('sharing.minSearchStringLength', 0);

apps/files_sharing/lib/External/Storage.php

 
 		$host = parse_url($remote, PHP_URL_HOST);
 		$port = parse_url($remote, PHP_URL_PORT);
-		$host .= (null === $port) ? '' : ':' . $port; // we add port if available
+		$host .= ($port === null) ? '' : ':' . $port; // we add port if available
 
 		// in case remote NC is on a sub folder and using deprecated ocm provider
 		$tmpPath = rtrim(parse_url($this->cloudId->getRemote(), PHP_URL_PATH) ?? '', '/');

apps/files_sharing/lib/Helper.php

 	 * @param string|null $userId
 	 * @return string
 	 */
-	public static function getShareFolder(View $view = null, string $userId = null): string {
+	public static function getShareFolder(?View $view = null, ?string $userId = null): string {
 		if ($view === null) {
 			$view = Filesystem::getView();
 		}

apps/files_sharing/lib/ShareBackend/File.php

 	/** @var FederatedShareProvider */
 	private $federatedShareProvider;
 
-	public function __construct(FederatedShareProvider $federatedShareProvider = null) {
+	public function __construct(?FederatedShareProvider $federatedShareProvider = null) {
 		if ($federatedShareProvider) {
 			$this->federatedShareProvider = $federatedShareProvider;
 		} else {

apps/files_trashbin/lib/Command/ExpireTrash.php

 	 * @param IUserManager|null $userManager
 	 * @param Expiration|null $expiration
 	 */
-	public function __construct(IUserManager $userManager = null,
-		Expiration $expiration = null) {
+	public function __construct(?IUserManager $userManager = null,
+		?Expiration $expiration = null) {
 		parent::__construct();
 
 		$this->userManager = $userManager;

apps/files_trashbin/lib/Events/BeforeNodeRestoredEvent.php

 	/**
 	 * @return never
 	 */
-	public function abortOperation(\Throwable $ex = null) {
+	public function abortOperation(?\Throwable $ex = null) {
 		$this->stopPropagation();
 		$this->run = false;
 		if ($ex !== null) {

apps/files_trashbin/lib/Storage.php

 	 */
 	public function __construct(
 		$parameters,
-		ITrashManager $trashManager = null,
-		IUserManager $userManager = null,
-		LoggerInterface $logger = null,
-		IEventDispatcher $eventDispatcher = null,
-		IRootFolder $rootFolder = null
+		?ITrashManager $trashManager = null,
+		?IUserManager $userManager = null,
+		?LoggerInterface $logger = null,
+		?IEventDispatcher $eventDispatcher = null,
+		?IRootFolder $rootFolder = null
 	) {
 		$this->mountPoint = $parameters['mountPoint'];
 		$this->trashManager = $trashManager;

apps/files_trashbin/lib/Trash/LegacyTrashBackend.php

 	 * @param ITrashItem $parent
 	 * @return ITrashItem[]
 	 */
-	private function mapTrashItems(array $items, IUser $user, ITrashItem $parent = null): array {
+	private function mapTrashItems(array $items, IUser $user, ?ITrashItem $parent = null): array {
 		$parentTrashPath = ($parent instanceof ITrashItem) ? $parent->getTrashPath() : '';
 		$isRoot = $parent === null;
 		return array_map(function (FileInfo $file) use ($parent, $parentTrashPath, $isRoot, $user) {

apps/provisioning_api/lib/Controller/GroupsController.php

 	 *
 	 * 200: Groups details returned
 	 */
-	public function getGroupsDetails(string $search = '', int $limit = null, int $offset = 0): DataResponse {
+	public function getGroupsDetails(string $search = '', ?int $limit = null, int $offset = 0): DataResponse {
 		$groups = $this->groupManager->search($search, $limit, $offset);
 		$groups = array_map(function ($group) {
 			/** @var IGroup $group */
 	 *
 	 * 200: Group users details returned
 	 */
-	public function getGroupUsersDetails(string $groupId, string $search = '', int $limit = null, int $offset = 0): DataResponse {
+	public function getGroupUsersDetails(string $groupId, string $search = '', ?int $limit = null, int $offset = 0): DataResponse {
 		$groupId = urldecode($groupId);
 		$currentUser = $this->userSession->getUser();
 

apps/provisioning_api/lib/Controller/UsersController.php

 	 *
 	 * 200: Users returned
 	 */
-	public function getUsers(string $search = '', int $limit = null, int $offset = 0): DataResponse {
+	public function getUsers(string $search = '', ?int $limit = null, int $offset = 0): DataResponse {
 		$user = $this->userSession->getUser();
 		$users = [];
 
 	 *
 	 * 200: Users details returned
 	 */
-	public function getUsersDetails(string $search = '', int $limit = null, int $offset = 0): DataResponse {
+	public function getUsersDetails(string $search = '', ?int $limit = null, int $offset = 0): DataResponse {
 		$currentUser = $this->userSession->getUser();
 		$users = [];
 

apps/settings/lib/Activity/GroupProvider.php

 		$this->groupManager = $groupManager;
 	}
 
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getType() !== 'group_settings') {
 			throw new InvalidArgumentException();
 		}

apps/settings/lib/Activity/Provider.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null): IEvent {
 		if ($event->getApp() !== 'settings') {
 			throw new \InvalidArgumentException('Unknown app');
 		}

apps/settings/lib/Activity/SecurityProvider.php

 		$this->activityManager = $activityManager;
 	}
 
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getType() !== 'security') {
 			throw new InvalidArgumentException();
 		}

apps/settings/lib/Controller/ChangePasswordController.php

 	 * @NoSubAdminRequired
 	 * @BruteForceProtection(action=changePersonalPassword)
 	 */
-	public function changePersonalPassword(string $oldpassword = '', string $newpassword = null): JSONResponse {
+	public function changePersonalPassword(string $oldpassword = '', ?string $newpassword = null): JSONResponse {
 		$loginName = $this->userSession->getLoginName();
 		/** @var IUser $user */
 		$user = $this->userManager->checkPassword($loginName, $oldpassword);
 	 * @NoAdminRequired
 	 * @PasswordConfirmationRequired
 	 */
-	public function changeUserPassword(string $username = null, string $password = null, string $recoveryPassword = null): JSONResponse {
+	public function changeUserPassword(?string $username = null, ?string $password = null, ?string $recoveryPassword = null): JSONResponse {
 		if ($username === null) {
 			return new JSONResponse([
 				'status' => 'error',

apps/settings/lib/Controller/UsersController.php

 				continue;
 			}
 			$property = $userAccount->getProperty($property);
-			if (null !== $data['value']) {
+			if ($data['value'] !== null) {
 				$property->setValue($data['value']);
 			}
-			if (null !== $data['scope']) {
+			if ($data['scope'] !== null) {
 				$property->setScope($data['scope']);
 			}
 		}

apps/settings/lib/Mailer/NewUserMailHelper.php

 				ISecureRandom::CHAR_ALPHANUMERIC
 			);
 			$tokenValue = $this->timeFactory->getTime() . ':' . $token;
-			$mailAddress = (null !== $user->getEMailAddress()) ? $user->getEMailAddress() : '';
+			$mailAddress = ($user->getEMailAddress() !== null) ? $user->getEMailAddress() : '';
 			$encryptedValue = $this->crypto->encrypt($tokenValue, $mailAddress . $this->config->getSystemValue('secret'));
 			$this->config->setUserValue($user->getUID(), 'core', 'lostpassword', $encryptedValue);
 			$link = $this->urlGenerator->linkToRouteAbsolute('core.lost.resetform', ['userId' => $user->getUID(), 'token' => $token]);

apps/settings/lib/SetupChecks/PhpOpcacheSetup.php

 
 			if (
 				// Do not recommend to raise the interned strings buffer size above a quarter of the total OPcache size
-				($this->iniGetWrapper->getNumeric('opcache.interned_strings_buffer') ?? 0 < $this->iniGetWrapper->getNumeric('opcache.memory_consumption') ?? 0 / 4) &&
+				($this->iniGetWrapper->getNumeric('opcache.interned_strings_buffer') ?? $this->iniGetWrapper->getNumeric('opcache.memory_consumption') > 0 ?? 0 / 4) &&
 				(
 					empty($status['interned_strings_usage']['free_memory']) ||
 					($status['interned_strings_usage']['used_memory'] / $status['interned_strings_usage']['free_memory'] > 9)

apps/settings/templates/settings/personal/security/twofactor.php

 		//Handle 2FA provider icons and theme
 		if ($provider instanceof \OCP\Authentication\TwoFactorAuth\IProvidesIcons) {
 			$icon = $provider->getDarkIcon();
-		//fallback icon if the 2factor provider doesn't provide an icon.
+			//fallback icon if the 2factor provider doesn't provide an icon.
 		} else {
 			$icon = image_path('core', 'actions/password.svg');
 		}
 	<?php } ?>
 	</ul>
 </div>
-

apps/sharebymail/lib/Activity.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'sharebymail') {
 			throw new \InvalidArgumentException();
 		}

apps/systemtags/lib/Activity/Provider.php

 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'systemtags') {
 			throw new \InvalidArgumentException();
 		}

apps/testing/lib/Controller/LockingController.php

 		throw new OCSException('', Http::STATUS_LOCKED);
 	}
 
-	public function releaseAll(int $type = null): DataResponse {
+	public function releaseAll(?int $type = null): DataResponse {
 		$lockingProvider = $this->getLockingProvider();
 
 		foreach ($this->config->getAppKeys('testing') as $lock) {

apps/theming/lib/Controller/UserThemeController.php

 	 * 200: Background set successfully
 	 * 400: Setting background is not possible
 	 */
-	public function setBackground(string $type = BackgroundService::BACKGROUND_DEFAULT, string $value = '', string $color = null): JSONResponse {
+	public function setBackground(string $type = BackgroundService::BACKGROUND_DEFAULT, string $value = '', ?string $color = null): JSONResponse {
 		$currentVersion = (int)$this->config->getUserValue($this->userId, Application::APP_ID, 'userCacheBuster', '0');
 
 		// Set color if provided

apps/theming/lib/Service/ThemeInjectionService.php

 	 * @param bool $plain request the :root syntax
 	 * @param string $media media query to use in the <link> element
 	 */
-	private function addThemeHeaders(ITheme $theme, bool $plain = true, string $media = null): void {
+	private function addThemeHeaders(ITheme $theme, bool $plain = true, ?string $media = null): void {
 		$linkToCSS = $this->urlGenerator->linkToRoute('theming.Theming.getThemeStylesheet', [
 			'themeId' => $theme->getId(),
 			'plain' => $plain,

apps/theming/tests/Controller/UserThemeControllerTest.php

 	 * @param string $themeId
 	 * @param string $exception
 	 */
-	public function testEnableTheme($themeId, string $exception = null) {
+	public function testEnableTheme($themeId, ?string $exception = null) {
 		$this->themesService
 			->expects($this->any())
 			->method('getThemes')
 	 * @param string $themeId
 	 * @param string $exception
 	 */
-	public function testDisableTheme($themeId, string $exception = null) {
+	public function testDisableTheme($themeId, ?string $exception = null) {
 		$this->themesService
 			->expects($this->any())
 			->method('getThemes')

apps/twofactor_backupcodes/lib/Activity/Provider.php

 		$this->l10n = $l10n;
 	}
 
-	public function parse($language, IEvent $event, IEvent $previousEvent = null): IEvent {
+	public function parse($language, IEvent $event, ?IEvent $previousEvent = null): IEvent {
 		if ($event->getApp() !== 'twofactor_backupcodes') {
 			throw new InvalidArgumentException();
 		}

apps/twofactor_backupcodes/lib/Service/BackupCodeStorage.php

 		$total = count($codes);
 		$used = 0;
 		array_walk($codes, function (BackupCode $code) use (&$used) {
-			if (1 === (int)$code->getUsed()) {
+			if ((int)$code->getUsed() === 1) {
 				$used++;
 			}
 		});
 		$dbCodes = $this->mapper->getBackupCodes($user);
 
 		foreach ($dbCodes as $dbCode) {
-			if (0 === (int)$dbCode->getUsed() && $this->hasher->verify($code, $dbCode->getCode())) {
+			if ((int)$dbCode->getUsed() === 0 && $this->hasher->verify($code, $dbCode->getCode())) {
 				$dbCode->setUsed(1);
 				$this->mapper->update($dbCode);
 				return true;

apps/user_ldap/lib/Access.php

 	 * @return false|string with with the name to use in Nextcloud
 	 * @throws \Exception
 	 */
-	public function dn2ocname($fdn, $ldapName = null, $isUser = true, &$newlyMapped = null, array $record = null) {
+	public function dn2ocname($fdn, $ldapName = null, $isUser = true, &$newlyMapped = null, ?array $record = null) {
 		static $intermediates = [];
 		if (isset($intermediates[($isUser ? 'user-' : 'group-') . $fdn])) {
 			return false; // is a known intermediate
 	/**
 	 * @throws \Exception
 	 */
-	public function fetchListOfUsers(string $filter, array $attr, int $limit = null, int $offset = null, bool $forceApplyAttributes = false): array {
+	public function fetchListOfUsers(string $filter, array $attr, ?int $limit = null, ?int $offset = null, bool $forceApplyAttributes = false): array {
 		$ldapRecords = $this->searchUsers($filter, $attr, $limit, $offset);
 		$recordsToUpdate = $ldapRecords;
 		if (!$forceApplyAttributes) {
 	/**
 	 * @return array[]
 	 */
-	public function fetchListOfGroups(string $filter, array $attr, int $limit = null, int $offset = null): array {
+	public function fetchListOfGroups(string $filter, array $attr, ?int $limit = null, ?int $offset = null): array {
 		$cacheKey = 'fetchListOfGroups_' . $filter . '_' . implode('-', $attr) . '_' . (string)$limit . '_' . (string)$offset;
 		$listOfGroups = $this->connection->getFromCache($cacheKey);
 		if (!is_null($listOfGroups)) {
 	/**
 	 * @throws ServerNotAvailableException
 	 */
-	public function searchUsers(string $filter, array $attr = null, int $limit = null, int $offset = null): array {
+	public function searchUsers(string $filter, ?array $attr = null, ?int $limit = null, ?int $offset = null): array {
 		$result = [];
 		foreach ($this->connection->ldapBaseUsers as $base) {
 			$result = array_merge($result, $this->search($filter, $base, $attr, $limit, $offset));
 	 * @return false|int
 	 * @throws ServerNotAvailableException
 	 */
-	public function countUsers(string $filter, array $attr = ['dn'], int $limit = null, int $offset = null) {
+	public function countUsers(string $filter, array $attr = ['dn'], ?int $limit = null, ?int $offset = null) {
 		$result = false;
 		foreach ($this->connection->ldapBaseUsers as $base) {
 			$count = $this->count($filter, [$base], $attr, $limit ?? 0, $offset ?? 0);
 	 * Executes an LDAP search
 	 * @throws ServerNotAvailableException
 	 */
-	public function searchGroups(string $filter, array $attr = null, int $limit = null, int $offset = null): array {
+	public function searchGroups(string $filter, ?array $attr = null, ?int $limit = null, ?int $offset = null): array {
 		$result = [];
 		foreach ($this->connection->ldapBaseGroups as $base) {
 			$result = array_merge($result, $this->search($filter, $base, $attr, $limit, $offset));
 	 * @return int|bool
 	 * @throws ServerNotAvailableException
 	 */
-	public function countGroups(string $filter, array $attr = ['dn'], int $limit = null, int $offset = null) {
+	public function countGroups(string $filter, array $attr = ['dn'], ?int $limit = null, ?int $offset = null) {
 		$result = false;
 		foreach ($this->connection->ldapBaseGroups as $base) {
 			$count = $this->count($filter, [$base], $attr, $limit ?? 0, $offset ?? 0);
 	 * @return int|bool
 	 * @throws ServerNotAvailableException
 	 */
-	public function countObjects(int $limit = null, int $offset = null) {
+	public function countObjects(?int $limit = null, ?int $offset = null) {
 		$result = false;
 		foreach ($this->connection->ldapBase as $base) {
 			$count = $this->count('objectclass=*', [$base], ['dn'], $limit ?? 0, $offset ?? 0);
 	private function count(
 		string $filter,
 		array $bases,
-		array $attr = null,
+		?array $attr = null,
 		int $limit = 0,
 		int $offset = 0,
 		bool $skipHandling = false
 	 * @return false|string
 	 * @throws ServerNotAvailableException
 	 */
-	public function getUUID(string $dn, bool $isUser = true, array $ldapRecord = null) {
+	public function getUUID(string $dn, bool $isUser = true, ?array $ldapRecord = null) {
 		if ($isUser) {
 			$uuidAttr = 'ldapUuidUserAttribute';
 			$uuidOverride = $this->connection->ldapExpertUUIDUserAttr;
 			}
 			$this->logger->debug('Ready for a paged search', ['app' => 'user_ldap']);
 			return [true, $pageSize, $this->lastCookie];
-		/* ++ Fixing RHDS searches with pages with zero results ++
-		 * We couldn't get paged searches working with our RHDS for login ($limit = 0),
-		 * due to pages with zero results.
-		 * So we added "&& !empty($this->lastCookie)" to this test to ignore pagination
-		 * if we don't have a previous paged search.
-		 */
+			/* ++ Fixing RHDS searches with pages with zero results ++
+			 * We couldn't get paged searches working with our RHDS for login ($limit = 0),
+			 * due to pages with zero results.
+			 * So we added "&& !empty($this->lastCookie)" to this test to ignore pagination
+			 * if we don't have a previous paged search.
+			 */
 		} elseif ($this->lastCookie !== '') {
 			// a search without limit was requested. However, if we do use
 			// Paged Search once, we always must do it. This requires us to

apps/user_ldap/lib/Configuration.php

 	 * array
 	 * @param array &$applied optional; array where the set fields will be given to
 	 */
-	public function setConfiguration(array $config, array &$applied = null): void {
+	public function setConfiguration(array $config, ?array &$applied = null): void {
 		$cta = $this->getConfigTranslationArray();
 		foreach ($config as $inputKey => $val) {
 			if (str_contains($inputKey, '_') && array_key_exists($inputKey, $cta)) {

apps/user_ldap/lib/Connection.php

 	 * @param string $key
 	 * @param mixed $value
 	 */
-	public function writeToCache($key, $value, int $ttlOverride = null): void {
+	public function writeToCache($key, $value, ?int $ttlOverride = null): void {
 		if (!$this->configured) {
 			$this->readConfiguration();
 		}

apps/user_ldap/lib/DataCollector/LdapDataCollector.php

 		return 'ldap';
 	}
 
-	public function collect(Request $request, Response $response, \Throwable $exception = null): void {
+	public function collect(Request $request, Response $response, ?\Throwable $exception = null): void {
 	}
 }

apps/user_ldap/lib/Jobs/Sync.php

 	 * @param array|null $cycleData the old cycle
 	 * @return array|null
 	 */
-	public function determineNextCycle(array $cycleData = null) {
+	public function determineNextCycle(?array $cycleData = null) {
 		$prefixes = $this->ldapHelper->getServerConfigurationPrefixes(true);
 		if (count($prefixes) === 0) {
 			return null;

apps/user_ldap/lib/Mapping/AbstractMapping.php

 		return $this->getXbyY('directory_uuid', 'ldap_dn_hash', $this->getDNHash($dn));
 	}
 
-	public function getList(int $offset = 0, int $limit = null, bool $invalidatedOnly = false): array {
+	public function getList(int $offset = 0, ?int $limit = null, bool $invalidatedOnly = false): array {
 		$select = $this->dbc->getQueryBuilder();
 		$select->selectAlias('ldap_dn', 'dn')
 			->selectAlias('owncloud_name', 'name')

apps/user_ldap/lib/User/User.php

 			($profileCached === null) && // no cache or TTL not expired
 			!$this->wasRefreshed('profile')) {
 			// check current data
-			$profileValues = array();
+			$profileValues = [];
 			//User Profile Field - Phone number
 			$attr = strtolower($this->connection->ldapAttributePhone);
 			if (!empty($attr)) { // attribute configured
 				if (str_contains($ldapEntry[$attr][0], '\r')) {
 					// convert line endings
 					$profileValues[\OCP\Accounts\IAccountManager::PROPERTY_BIOGRAPHY]
-						= str_replace(array("\r\n","\r"), "\n", $ldapEntry[$attr][0]);
+						= str_replace(["\r\n","\r"], "\n", $ldapEntry[$attr][0]);
 				} else {
 					$profileValues[\OCP\Accounts\IAccountManager::PROPERTY_BIOGRAPHY]
 						= $ldapEntry[$attr][0];
 		if ($path !== '') {
 			//if attribute's value is an absolute path take this, otherwise append it to data dir
 			//check for / at the beginning or pattern c:\ resp. c:/
-			if ('/' !== $path[0]
-			   && !(3 < strlen($path) && ctype_alpha($path[0])
-				   && $path[1] === ':' && ('\\' === $path[2] || '/' === $path[2]))
+			if ($path[0] !== '/'
+			   && !(strlen($path) > 3 && ctype_alpha($path[0])
+				   && $path[1] === ':' && ($path[2] === '\\' || $path[2] === '/'))
 			) {
 				$path = $this->config->getSystemValue('datadirectory',
 					\OC::$SERVERROOT.'/data') . '/' . $path;
 	 * @throws \OCP\PreConditionNotMetException
 	 * @throws \OC\ServerNotAvailableException
 	 */
-	public function updateExtStorageHome(string $valueFromLDAP = null):string {
+	public function updateExtStorageHome(?string $valueFromLDAP = null):string {
 		if ($valueFromLDAP === null) {
 			$extHomeValues = $this->access->readAttribute($this->getDN(), $this->connection->ldapExtStorageHomeAttribute);
 		} else {

apps/user_ldap/tests/Group_LDAPTest.php

 	 * @param string[] $expectedMembers
 	 * @dataProvider groupMemberProvider
 	 */
-	public function testGroupMembers(array $expectedResult, array $groupsInfo = null) {
+	public function testGroupMembers(array $expectedResult, ?array $groupsInfo = null) {
 		$this->access->expects($this->any())
 			->method('readAttribute')
 			->willReturnCallback(function ($group) use ($groupsInfo) {

apps/user_ldap/tests/Integration/Lib/User/IntegrationTestUserCleanUp.php

 		}
 		$user->delete();
 
-		return null === \OC::$server->getUserManager()->get($username);
+		return \OC::$server->getUserManager()->get($username) === null;
 	}
 }