Initial support for PHP 8.4 (#6615)

* Initial support for PHP 8.4
Sole fix needed so far seems to be related to https://wiki.php.net/rfc/deprecate-implicitly-nullable-types

See also upstream PR https://github.com/PhpGt/CssXPath/pull/227

We are also hitting was seems to be a PHP bug https://github.com/php/php-src/issues/14873

* Fix return type

* Disable OPCache while waiting for PHP fix

2 files changed, 2 insertions, 2 deletions

diff --git a/cli/CliOptionsParser.php b/cli/CliOptionsParser.php
index f75f6c19a..9fb50a4ff 100644
--- a/cli/CliOptionsParser.php
+++ b/cli/CliOptionsParser.php
@@ -43,7 +43,7 @@ abstract class CliOptionsParser {
 	 * @param string $defaultInput If not null this value is received as input in all cases where no
 	 *  user input is present. e.g. set this if you want an option to always return a value.
 	 */
-	protected function addOption(string $name, CliOption $option, string $defaultInput = null): void {
+	protected function addOption(string $name, CliOption $option, ?string $defaultInput = null): void {
 		$this->inputs[$name] = [
 			'defaultInput' => is_string($defaultInput) ? [$defaultInput] : $defaultInput,
 			'required' => null,
diff --git a/cli/i18n/I18nData.php b/cli/i18n/I18nData.php
index 4142c92d1..6d5730a08 100644
--- a/cli/i18n/I18nData.php
+++ b/cli/i18n/I18nData.php
@@ -101,7 +101,7 @@ class I18nData {
 	 * Add a new language. It’s a copy of the reference language.
 	 * @throws Exception
 	 */
-	public function addLanguage(string $language, string $reference = null): void {
+	public function addLanguage(string $language, ?string $reference = null): void {
 		if (array_key_exists($language, $this->data)) {
 			throw new Exception('The selected language already exist.');
 		}