Support PHP 8.5 (#171)

PHP 8.3 -> PHP 8.4:

* Function parameters that are null by default must be declared nullable.

PHP 8.4 -> PHP 8.5:

* Using null as an array offset is deprecated; use empty string instead.

Author: lippserd

application/forms/DimensionsForm.php

@@ -79,7 +79,7 @@ public function assemble()
             $allDimensions = $this->cube->listAdditionalDimensions();
 
             $this->addElement('select', 'addDimension', [
-                'options' => [null => $this->translate('+ Add a dimension')] + $allDimensions,
+                'options' => ['' => $this->translate('+ Add a dimension')] + $allDimensions,
                 'class'   => 'autosubmit'
             ]);
         }

library/Cube/Cube.php

@@ -327,10 +327,10 @@ public function listColumns()
 
     /**
      * @param View $view
-     * @param CubeRenderer $renderer
+     * @param ?CubeRenderer $renderer
      * @return string
      */
-    public function render(View $view, CubeRenderer $renderer = null)
+    public function render(View $view, ?CubeRenderer $renderer = null)
     {
         if ($renderer === null) {
             $renderer = $this->getRenderer();

library/Cube/Hook/IcingaDbActionsHook.php

@@ -71,10 +71,10 @@ final protected function addActionLink(Url $url, string $title, string $descript
      * Helper method instantiating an Url object
      *
      * @param string $path
-     * @param array $params
+     * @param ?array $params
      * @return Url
      */
-    final protected function makeUrl(string $path, array $params = null): Url
+    final protected function makeUrl(string $path, ?array $params = null): Url
     {
         $url = Url::fromPath($path);
         if ($params !== null) {

library/Cube/Ido/DataView/Hoststatus.php

@@ -9,7 +9,7 @@
 
 class Hoststatus extends \Icinga\Module\Monitoring\DataView\Hoststatus
 {
-    public function __construct(ConnectionInterface $connection, array $columns = null)
+    public function __construct(ConnectionInterface $connection, ?array $columns = null)
     {
         $this->connection = $connection;
         $this->query = new HoststatusQuery($connection->getResource(), $columns);