[TASK] Define explicit nullable types for compatibility with PHP 8.4

Author: Albrecht Köhnlein

Classes/Service/XsdGenerator.php

@@ -124,7 +124,7 @@ protected function getDefaultPrefixForNamespace(string $namespace): int|string
      *
      * @return array Array of generated XML target namespaces
      */
-    public function generateXsd(string $path, string $namespace = null): array
+    public function generateXsd(string $path, ?string $namespace = null): array
     {
         $generatedNameSpaces = [];
         $namespaces = $this->componentLoader->getNamespaces();

Classes/ViewHelpers/Form/TranslatedValidationResultsViewHelper.php

@@ -162,10 +162,10 @@ protected static function translateMessage(
         RenderingContextInterface $renderingContext,
         Message $message,
         string $translatePrefix = '',
-        RootRenderableInterface $element = null,
-        string $extensionName = null,
-        string $languageKey = null,
-        array $alternativeLanguageKeys = null
+        ?RootRenderableInterface $element = null,
+        ?string $extensionName = null,
+        ?string $languageKey = null,
+        ?array $alternativeLanguageKeys = null
     ) {
         // Make sure that messages are translated only once
         $hash = spl_object_hash($message);
@@ -229,9 +229,9 @@ public static function translateValidationError(
         int $code,
         array $arguments,
         string $defaultValue = '',
-        string $extensionName = null,
-        string $languageKey = null,
-        array $alternativeLanguageKeys = null
+        ?string $extensionName = null,
+        ?string $languageKey = null,
+        ?array $alternativeLanguageKeys = null
     ): ?string {
         if ($alternativeLanguageKeys) {
             trigger_error('Calling translatedValidationResults with the argument $alternativeLanguageKeys will be removed in fluid-components 4.0', E_USER_DEPRECATED);