code styles

EventSubscriber/ActionsSubscriber.php

@@ -44,7 +44,7 @@ public function onActions(PageActionsEvent $event): void
             ]);
         }
 
-        if (!isset($payload['counter'])) {
+        if (!isset($payload['counter']) || !is_numeric($payload['counter'])) {
             return;
         }
 

Form/DemoType.php

@@ -16,6 +16,9 @@
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
 
+/**
+ * @extends AbstractType<DemoEntity>
+ */
 class DemoType extends AbstractType
 {
     public function buildForm(FormBuilderInterface $builder, array $options): void

Repository/DemoRepository.php

@@ -14,9 +14,6 @@
 
 final class DemoRepository
 {
-    /**
-     * @var string
-     */
     private string $storage;
 
     public function __construct(string $dataDirectory)
@@ -37,8 +34,8 @@ public function getDemoEntity(): DemoEntity
         if ($data !== false) {
             $json = json_decode($data, true);
 
-            if (\array_key_exists('counter', $json)) {
-                $entity->setCounter($json['counter']);
+            if (\is_array($json) && \array_key_exists('counter', $json) && is_numeric($json['counter'])) {
+                $entity->setCounter((int) $json['counter']);
             }
         }
 
@@ -53,6 +50,9 @@ public function saveDemoEntity(DemoEntity $entity): void
             $data = file_get_contents($this->storage);
             if ($data !== false) {
                 $vars = json_decode($data, true);
+                if (!\is_array($vars)) {
+                    throw new \Exception('Failed reading demo content storage file at data/demo.json');
+                }
             }
         }
 

phpstan.neon

@@ -10,5 +10,3 @@ parameters:
         - vendor/
     treatPhpDocTypesAsCertain: false
     inferPrivatePropertyTypeFromConstructor: true
-    checkMissingIterableValueType: false
-    checkGenericClassInNonGenericObjectType: false