API Explicity mark nullable paramters for PHP 8.4

src/Control/Director.php

@@ -511,7 +511,7 @@ protected static function validateUserAndPass($url)
      * @param HTTPRequest $request
      * @return string Host name, including port (if present)
      */
-    public static function host(HTTPRequest $request = null)
+    public static function host(?HTTPRequest $request = null)
     {
         // Check if overridden by alternate_base_url
         if ($baseURL = static::config()->get('alternate_base_url')) {
@@ -553,7 +553,7 @@ public static function host(HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return int|null
      */
-    public static function port(HTTPRequest $request = null)
+    public static function port(?HTTPRequest $request = null)
     {
         $host = static::host($request);
         return (int)parse_url($host ?? '', PHP_URL_PORT) ?: null;
@@ -565,7 +565,7 @@ public static function port(HTTPRequest $request = null)
      * @param HTTPRequest|null $request
      * @return string|null
      */
-    public static function hostName(HTTPRequest $request = null)
+    public static function hostName(?HTTPRequest $request = null)
     {
         $host = static::host($request);
         return parse_url($host ?? '', PHP_URL_HOST) ?: null;
@@ -578,7 +578,7 @@ public static function hostName(HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return bool|string
      */
-    public static function protocolAndHost(HTTPRequest $request = null)
+    public static function protocolAndHost(?HTTPRequest $request = null)
     {
         return static::protocol($request) . static::host($request);
     }
@@ -589,7 +589,7 @@ public static function protocolAndHost(HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return string
      */
-    public static function protocol(HTTPRequest $request = null)
+    public static function protocol(?HTTPRequest $request = null)
     {
         return (Director::is_https($request)) ? 'https://' : 'http://';
     }
@@ -600,7 +600,7 @@ public static function protocol(HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return bool
      */
-    public static function is_https(HTTPRequest $request = null)
+    public static function is_https(?HTTPRequest $request = null)
     {
         // Check override from alternate_base_url
         if ($baseURL = static::config()->uninherited('alternate_base_url')) {
@@ -925,7 +925,7 @@ public static function absoluteBaseURL()
      * @param HTTPRequest|null $request
      * @return string
      */
-    public static function absoluteBaseURLWithAuth(HTTPRequest $request = null)
+    public static function absoluteBaseURLWithAuth(?HTTPRequest $request = null)
     {
         // Detect basic auth
         $login = '';
@@ -985,7 +985,7 @@ protected static function force_redirect($destURL)
      * Can include port number.
      * @param HTTPRequest|null $request Request object to check
      */
-    public static function forceSSL($patterns = null, $secureDomain = null, HTTPRequest $request = null)
+    public static function forceSSL($patterns = null, $secureDomain = null, ?HTTPRequest $request = null)
     {
         $handler = CanonicalURLMiddleware::singleton()->setForceSSL(true);
         if ($patterns) {
@@ -1002,7 +1002,7 @@ public static function forceSSL($patterns = null, $secureDomain = null, HTTPRequ
      *
      * @param HTTPRequest $request
      */
-    public static function forceWWW(HTTPRequest $request = null)
+    public static function forceWWW(?HTTPRequest $request = null)
     {
         $handler = CanonicalURLMiddleware::singleton()->setForceWWW(true);
         $handler->throwRedirectIfNeeded($request);
@@ -1018,7 +1018,7 @@ public static function forceWWW(HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return bool
      */
-    public static function is_ajax(HTTPRequest $request = null)
+    public static function is_ajax(?HTTPRequest $request = null)
     {
         $request = Director::currentRequest($request);
         if ($request) {
@@ -1063,7 +1063,7 @@ public static function get_environment_type()
      *
      * @return string|null null if not overridden, otherwise the actual value
      */
-    public static function get_session_environment_type(HTTPRequest $request = null)
+    public static function get_session_environment_type(?HTTPRequest $request = null)
     {
         $request = static::currentRequest($request);
 
@@ -1139,7 +1139,7 @@ public static function get_template_global_variables()
      * @param HTTPRequest $request
      * @return HTTPRequest Request object if one is both current and valid
      */
-    protected static function currentRequest(HTTPRequest $request = null)
+    protected static function currentRequest(?HTTPRequest $request = null)
     {
         // Ensure we only use a registered HTTPRequest and don't
         // incidentally construct a singleton

src/Control/Email/Email.php

@@ -228,7 +228,7 @@ private function getDefaultFrom(): string|array
     /**
      * Passing a string of HTML for $body will have no affect if you also call either setData() or addData()
      */
-    public function setBody(AbstractPart|string $body = null): static
+    public function setBody(AbstractPart|string|null $body = null): static
     {
         if ($body instanceof AbstractPart) {
             // pass to Symfony\Component\Mime\Message::setBody()
@@ -326,7 +326,7 @@ public function addAttachment(string $path, ?string $alias = null, ?string $mime
         return $this->attachFromPath($path, $alias, $mime);
     }
 
-    public function addAttachmentFromData(string $data, string $name, string $mime = null): static
+    public function addAttachmentFromData(string $data, string $name, ?string $mime = null): static
     {
         return $this->attach($data, $name, $mime);
     }

src/Control/Middleware/CanonicalURLMiddleware.php

@@ -310,7 +310,7 @@ protected function getRedirect(HTTPRequest $request)
      * @param HTTPRequest|null $request Allow HTTPRequest to be used for the base comparison
      * @throws HTTPResponse_Exception
      */
-    public function throwRedirectIfNeeded(HTTPRequest $request = null)
+    public function throwRedirectIfNeeded(?HTTPRequest $request = null)
     {
         $request = $this->getOrValidateRequest($request);
         if (!$request) {
@@ -328,7 +328,7 @@ public function throwRedirectIfNeeded(HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return HTTPRequest|null
      */
-    protected function getOrValidateRequest(HTTPRequest $request = null)
+    protected function getOrValidateRequest(?HTTPRequest $request = null)
     {
         if ($request instanceof HTTPRequest) {
             return $request;
@@ -526,7 +526,7 @@ protected function isEnabled()
      * @param HTTPResponse $response
      * @return bool
      */
-    protected function hasBasicAuthPrompt(HTTPResponse $response = null)
+    protected function hasBasicAuthPrompt(?HTTPResponse $response = null)
     {
         if (!$response) {
             return false;

src/Control/Middleware/RequestHandlerMiddlewareAdapter.php

@@ -18,7 +18,7 @@ class RequestHandlerMiddlewareAdapter extends RequestHandler
      */
     protected $requestHandler = null;
 
-    public function __construct(RequestHandler $handler = null)
+    public function __construct(?RequestHandler $handler = null)
     {
         if ($handler) {
             $this->setRequestHandler($handler);

src/Control/PjaxResponseNegotiator.php

@@ -41,7 +41,7 @@ class PjaxResponseNegotiator
      * @param array $callbacks
      * @param HTTPResponse $response An existing response to reuse (optional)
      */
-    public function __construct($callbacks = [], HTTPResponse $response = null)
+    public function __construct($callbacks = [], ?HTTPResponse $response = null)
     {
         $this->callbacks = $callbacks;
         $this->response = $response ?: HTTPResponse::create();

src/Control/Session.php

@@ -404,7 +404,7 @@ private function isCookieSecure(string $sameSite, bool $isHttps): bool
      * @param bool $removeCookie
      * @param HTTPRequest $request The request for which to destroy a session
      */
-    public function destroy($removeCookie = true, HTTPRequest $request = null)
+    public function destroy($removeCookie = true, ?HTTPRequest $request = null)
     {
         if (session_id()) {
             if ($removeCookie) {

src/Core/Cache/AbstractCacheFactory.php

@@ -20,7 +20,7 @@ abstract class AbstractCacheFactory implements CacheFactory
     /**
      * @param LoggerInterface $logger Logger instance to assign
      */
-    public function __construct(LoggerInterface $logger = null)
+    public function __construct(?LoggerInterface $logger = null)
     {
         $this->logger = $logger;
     }

src/Core/Cache/DefaultCacheFactory.php

@@ -25,7 +25,7 @@ class DefaultCacheFactory extends AbstractCacheFactory
      * @param array $args List of global options to merge with args during create()
      * @param LoggerInterface $logger Logger instance to assign
      */
-    public function __construct($args = [], LoggerInterface $logger = null)
+    public function __construct($args = [], ?LoggerInterface $logger = null)
     {
         $this->args = $args;
         parent::__construct($logger);

src/Core/Cache/ManifestCacheFactory.php

@@ -17,7 +17,7 @@
  */
 class ManifestCacheFactory extends DefaultCacheFactory
 {
-    public function __construct(array $args = [], LoggerInterface $logger = null)
+    public function __construct(array $args = [], ?LoggerInterface $logger = null)
     {
         // Build default manifest logger
         if (!$logger) {

src/Core/Config/CoreConfigFactory.php

@@ -33,7 +33,7 @@ class CoreConfigFactory
      *
      * @param CacheFactory $cacheFactory
      */
-    public function __construct(CacheFactory $cacheFactory = null)
+    public function __construct(?CacheFactory $cacheFactory = null)
     {
         $this->cacheFactory = $cacheFactory;
     }

src/Core/Manifest/ClassManifest.php

@@ -198,7 +198,7 @@ class ClassManifest
      * @param string $base The manifest base path.
      * @param CacheFactory $cacheFactory Optional cache to use. Set to null to not cache.
      */
-    public function __construct($base, CacheFactory $cacheFactory = null)
+    public function __construct($base, ?CacheFactory $cacheFactory = null)
     {
         $this->base = $base;
         $this->cacheFactory = $cacheFactory;

src/Core/Manifest/ModuleManifest.php

@@ -73,7 +73,7 @@ class ModuleManifest
      * @param string $base The project base path.
      * @param CacheFactory $cacheFactory Cache factory to use
      */
-    public function __construct($base, CacheFactory $cacheFactory = null)
+    public function __construct($base, ?CacheFactory $cacheFactory = null)
     {
         $this->base = $base;
         $this->cacheKey = sha1($base ?? '') . '_modules';

src/Core/Validation/FieldValidation/DecimalFieldValidator.php

@@ -40,8 +40,8 @@ public function __construct(
         mixed $value,
         int $wholeSize,
         int $decimalSize,
-        int $minValue = null,
-        int $maxValue = null,
+        ?int $minValue = null,
+        ?int $maxValue = null,
     ) {
         parent::__construct($name, $value, $minValue, $maxValue);
         $this->wholeSize = $wholeSize;

src/Dev/Debug.php

@@ -38,7 +38,7 @@ class Debug
      * @param bool $showHeader
      * @param HTTPRequest|null $request
      */
-    public static function show($val, $showHeader = true, HTTPRequest $request = null)
+    public static function show($val, $showHeader = true, ?HTTPRequest $request = null)
     {
         // Don't show on live
         if (Director::isLive()) {
@@ -80,7 +80,7 @@ public static function caller()
      * @param bool $showHeader
      * @param HTTPRequest $request
      */
-    public static function endshow($val, $showHeader = true, HTTPRequest $request = null)
+    public static function endshow($val, $showHeader = true, ?HTTPRequest $request = null)
     {
         // Don't show on live
         if (Director::isLive()) {
@@ -100,7 +100,7 @@ public static function endshow($val, $showHeader = true, HTTPRequest $request =
      * @param mixed $val
      * @param HTTPRequest $request Current request to influence output format
      */
-    public static function dump($val, HTTPRequest $request = null)
+    public static function dump($val, ?HTTPRequest $request = null)
     {
         echo Debug::create_debug_view($request)
             ->renderVariable($val, Debug::caller());
@@ -113,7 +113,7 @@ public static function dump($val, HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return string
      */
-    public static function text($val, HTTPRequest $request = null)
+    public static function text($val, ?HTTPRequest $request = null)
     {
         return static::create_debug_view($request)
             ->debugVariableText($val);
@@ -127,7 +127,7 @@ public static function text($val, HTTPRequest $request = null)
      * @param bool $showHeader
      * @param HTTPRequest|null $request
      */
-    public static function message($message, $showHeader = true, HTTPRequest $request = null)
+    public static function message($message, $showHeader = true, ?HTTPRequest $request = null)
     {
         // Don't show on live
         if (Director::isLive()) {
@@ -144,7 +144,7 @@ public static function message($message, $showHeader = true, HTTPRequest $reques
      * @param HTTPRequest $request Optional request to target this view for
      * @return DebugView
      */
-    public static function create_debug_view(HTTPRequest $request = null)
+    public static function create_debug_view(?HTTPRequest $request = null)
     {
         $service = static::supportsHTML($request)
             ? DebugView::class
@@ -158,7 +158,7 @@ public static function create_debug_view(HTTPRequest $request = null)
      * @param HTTPRequest $request
      * @return bool
      */
-    protected static function supportsHTML(HTTPRequest $request = null)
+    protected static function supportsHTML(?HTTPRequest $request = null)
     {
         // No HTML output in CLI
         if (Director::is_cli()) {

src/Dev/FunctionalTest.php

@@ -191,7 +191,7 @@ public function post($url, $data, $headers = null, $session = null, $body = null
      * @param array $data Map of GET/POST data.
      * @param bool $withSecurityToken Submit with the form's security token if there is one.
      */
-    public function submitForm(string $formID, string $button = null, array $data = [], bool $withSecurityToken = true): HTTPResponse
+    public function submitForm(string $formID, ?string $button = null, array $data = [], bool $withSecurityToken = true): HTTPResponse
     {
         $this->cssParser = null;
         $response = $this->mainSession->submitForm($formID, $button, $data, $withSecurityToken);

src/Dev/TestMailer.php

@@ -33,7 +33,7 @@ public function __construct(
         $this->dispatcher = $dispatcher;
     }
 
-    public function send(RawMessage $message, Envelope $envelope = null): void
+    public function send(RawMessage $message, ?Envelope $envelope = null): void
     {
         if (!is_a($message, Email::class)) {
             throw new InvalidArgumentException('$message must be a ' . Email::class);
@@ -122,7 +122,7 @@ private function convertAddressesToString(array $addresses): string
         return implode(',', array_map(fn(Address $address) => $address->getAddress(), $addresses));
     }
 
-    private function dispatchEvent(Email $email, Envelope $envelope = null): void
+    private function dispatchEvent(Email $email, ?Envelope $envelope = null): void
     {
         $sender = $email->getSender()[0] ?? $email->getFrom()[0] ?? new Address('test.sender@example.com');
         $recipients = empty($email->getTo()) ? [new Address('test.recipient@example.com')] : $email->getTo();

src/Dev/TestSession.php

@@ -207,7 +207,7 @@ public function sendRequest($method, $url, $data, $headers = null, $session = nu
      * @param array $data Map of GET/POST data.
      * @param bool $withSecurityToken Submit with the form's security token if there is one.
      */
-    public function submitForm(string $formID, string $button = null, array $data = [], bool $withSecurityToken = true): HTTPResponse
+    public function submitForm(string $formID, ?string $button = null, array $data = [], bool $withSecurityToken = true): HTTPResponse
     {
         $page = $this->lastPage();
         if ($page) {

src/Forms/DefaultFormFactory.php

@@ -33,7 +33,7 @@ public function __construct()
      * @return Form
      * @throws InvalidArgumentException When required context is missing
      */
-    public function getForm(RequestHandler $controller = null, $name = FormFactory::DEFAULT_NAME, $context = [])
+    public function getForm(?RequestHandler $controller = null, $name = FormFactory::DEFAULT_NAME, $context = [])
     {
         // Validate context
         foreach ($this->getRequiredContext() as $required) {
@@ -64,7 +64,7 @@ public function getForm(RequestHandler $controller = null, $name = FormFactory::
      * @param array $context
      * @return FieldList
      */
-    protected function getFormFields(RequestHandler $controller = null, $name, $context = [])
+    protected function getFormFields(?RequestHandler $controller = null, $name, $context = [])
     {
         // Fall back to standard "getCMSFields" which itself uses the FormScaffolder as a fallback
         $fields = $context['Record']->getCMSFields();
@@ -80,7 +80,7 @@ protected function getFormFields(RequestHandler $controller = null, $name, $cont
      * @param array $context
      * @return FieldList
      */
-    protected function getFormActions(RequestHandler $controller = null, $name, $context = [])
+    protected function getFormActions(?RequestHandler $controller = null, $name, $context = [])
     {
         $actions = $context['Record']->getCMSActions();
         $this->invokeWithExtensions('updateFormActions', $actions, $controller, $name, $context);
@@ -93,7 +93,7 @@ protected function getFormActions(RequestHandler $controller = null, $name, $con
      * @param array $context
      * @return null|Validator
      */
-    protected function getFormValidator(RequestHandler $controller = null, $name, $context = [])
+    protected function getFormValidator(?RequestHandler $controller = null, $name, $context = [])
     {
         if (!$context['Record'] instanceof DataObject) {
             return null;