Issue #248. Fix nullables for PHP 8.4

includes/rules.core.inc

@@ -178,7 +178,7 @@ class RulesEntityController extends EntityPlusControllerExportable {
     return $config;
   }
 
-  public function save($rules_config, DatabaseTransaction $transaction = NULL) {
+  public function save($rules_config, ?DatabaseTransaction $transaction = NULL) {
     $transaction = isset($transaction) ? $transaction : db_transaction();
 
     // Load the stored entity, if any.
@@ -296,7 +296,7 @@ class RulesEntityController extends EntityPlusControllerExportable {
    *
    * @see EntityAPIControllerExportable::delete()
    */
-  public function delete($ids, DatabaseTransaction $transaction = NULL) {
+  public function delete($ids, ?DatabaseTransaction $transaction = NULL) {
     $transaction = isset($transaction) ? $transaction : db_transaction();
     // Use entity-load as ids may be the names as well as the ids.
     $configs = $ids ? entity_load('rules_config', $ids) : array();
@@ -1745,7 +1745,7 @@ abstract class RulesAbstractPlugin extends RulesPlugin {
   /**
    * Execute the configured execution callback and log that.
    */
-  abstract protected function executeCallback(array $args, RulesState $state = NULL);
+  abstract protected function executeCallback(array $args, ?RulesState $state = NULL);
 
   public function evaluate(RulesState $state) {
     $this->processSettings();

includes/rules.plugins.inc

@@ -17,7 +17,7 @@ class RulesAction extends RulesAbstractPlugin implements RulesActionInterface {
   /**
    * Execute the callback and update/save data as specified by the action.
    */
-  protected function executeCallback(array $args, RulesState $state = NULL) {
+  protected function executeCallback(array $args, ?RulesState $state = NULL) {
     rules_log('Evaluating the action %name.', array(
       '%name' => $this->label($this->elementName),
     ), RulesLog::INFO, $this);
@@ -107,7 +107,7 @@ class RulesCondition extends RulesAbstractPlugin implements RulesConditionInterf
     return $this->negate;
   }
 
-  protected function executeCallback(array $args, RulesState $state = NULL) {
+  protected function executeCallback(array $args, ?RulesState $state = NULL) {
     $return = (bool) $this->__call('execute', empty($this->info['named parameter']) ? $args : array($args));
     $return = $this->negate ? !$return : $return;
     rules_log('The condition %name evaluated to %bool', array(
@@ -416,7 +416,7 @@ class RulesReactionRule extends Rule implements RulesTriggerableInterface {
   /**
    * Implements RulesTriggerableInterface::event().
    */
-  public function event($event_name, array $settings = NULL) {
+  public function event($event_name, ?array $settings = NULL) {
     // Process any settings and determine the configured event's name.
     if ($settings) {
       $handler = rules_get_event_handler($event_name, $settings);

rules.module

@@ -216,7 +216,7 @@ function rules_action_set($variables = array(), $provides = array()) {
  *   (optional) This may be used to denote the beginning (TRUE) or the end
  *   (FALSE) of a new execution scope.
  */
-function rules_log($msg, $args = array(), $priority = RulesLog::INFO, RulesPlugin $element = NULL, $scope = NULL) {
+function rules_log($msg, $args = array(), $priority = RulesLog::INFO, ?RulesPlugin $element = NULL, $scope = NULL) {
   static $logger, $settings;
 
   // Statically cache the variable settings as this is called very often.
@@ -711,7 +711,7 @@ function rules_get_event_base_name($event_name) {
  * @return RulesEventHandlerInterface
  *   The event handler.
  */
-function rules_get_event_handler($event_name, array $settings = NULL) {
+function rules_get_event_handler($event_name, ?array $settings = NULL) {
   $event_name = rules_get_event_base_name($event_name);
   $event_info = rules_get_event_info($event_name);
   $class = !empty($event_info['class']) ? $event_info['class'] : 'RulesEventDefaultHandler';

ui/ui.core.inc

@@ -862,7 +862,7 @@ class RulesPluginUI extends FacesExtender implements RulesPluginUIInterface {
    * Generates a path using the given operation for the element with the given
    * id of the configuration with the given name.
    */
-  public static function path($name, $op = NULL, RulesPlugin $element = NULL, $parameter = FALSE) {
+  public static function path($name, $op = NULL, ?RulesPlugin $element = NULL, $parameter = FALSE) {
     $element_id = isset($element) ? $element->elementId() : FALSE;
     if (isset(self::$basePath)) {
       $base_path = self::$basePath;