diff --git a/.github/workflows/samples-php8.yaml b/.github/workflows/samples-php8.yaml
index 0d2941f6e3c..e1aca18ea87 100644
--- a/.github/workflows/samples-php8.yaml
+++ b/.github/workflows/samples-php8.yaml
@@ -16,6 +16,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        php:
+          - "8.1"
+          - "8.2"
+          - "8.3"
         sample:
           # servers
           - samples/server/petstore/php-symfony/SymfonyBundle-php/
@@ -25,7 +29,7 @@ jobs:
       - name: Setup PHP with tools
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.1'
+          php-version: "${{ matrix.php }}"
           tools: php-cs-fixer, phpunit
       - name: composer install
         working-directory: ${{ matrix.sample }}
diff --git a/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache b/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache
index 455b5586ef7..023b66c90f7 100644
--- a/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache
+++ b/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache
@@ -151,7 +151,7 @@ class Controller extends AbstractController
      *
      * @return array|null
      */
-    private function exceptionToArray(\Throwable $exception = null): ?array
+    private function exceptionToArray(?\Throwable $exception = null): ?array
     {
         if (null === $exception) {
             return null;
diff --git a/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache b/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache
index 962a4cdb2d5..d992f8fb193 100644
--- a/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache
+++ b/modules/openapi-generator/src/main/resources/php-symfony/model_generic.mustache
@@ -6,7 +6,7 @@ class {{classname}} {{#parentSchema}}extends {{{parent}}} {{/parentSchema}}
      * Constructor
      * @param array|null $data Associated array of property values initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         {{#parentSchema}}
         parent::__construct($data);
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
index abaf02d5b8c..e21a2f13813 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
@@ -161,7 +161,7 @@ class Controller extends AbstractController
      *
      * @return array|null
      */
-    private function exceptionToArray(\Throwable $exception = null): ?array
+    private function exceptionToArray(?\Throwable $exception = null): ?array
     {
         if (null === $exception) {
             return null;
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/ApiResponse.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/ApiResponse.php
index e7c2de6ce03..0ac640c0664 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/ApiResponse.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/ApiResponse.php
@@ -73,7 +73,7 @@ class ApiResponse
      * Constructor
      * @param array|null $data Associated array of property values initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         if (is_array($data)) {
             $this->code = array_key_exists('code', $data) ? $data['code'] : $this->code;
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Category.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Category.php
index fc827e4ae73..1debfbf9c16 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Category.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Category.php
@@ -66,7 +66,7 @@ class Category
      * Constructor
      * @param array|null $data Associated array of property values initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         if (is_array($data)) {
             $this->id = array_key_exists('id', $data) ? $data['id'] : $this->id;
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php
index 2aa65aa47a7..47ee65e211c 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Order.php
@@ -100,7 +100,7 @@ class Order
      * Constructor
      * @param array|null $data Associated array of property values initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         if (is_array($data)) {
             $this->id = array_key_exists('id', $data) ? $data['id'] : $this->id;
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php
index 5f229ab6bb1..299b55f603e 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Pet.php
@@ -106,7 +106,7 @@ class Pet
      * Constructor
      * @param array|null $data Associated array of property values initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         if (is_array($data)) {
             $this->id = array_key_exists('id', $data) ? $data['id'] : $this->id;
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Tag.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Tag.php
index 7d669ab9bb0..f42c3e2bceb 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Tag.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/Tag.php
@@ -65,7 +65,7 @@ class Tag
      * Constructor
      * @param array|null $data Associated array of property values initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         if (is_array($data)) {
             $this->id = array_key_exists('id', $data) ? $data['id'] : $this->id;
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/User.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/User.php
index b15d7fef65d..aec38c6a73e 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/User.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Model/User.php
@@ -115,7 +115,7 @@ class User
      * Constructor
      * @param array|null $data Associated array of property values initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         if (is_array($data)) {
             $this->id = array_key_exists('id', $data) ? $data['id'] : $this->id;