diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/.travis.yml b/modules/openapi-generator/src/main/resources/php-nextgen/.travis.yml
index 9d0fa66ff6c..707be2a11d5 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/.travis.yml
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/.travis.yml
@@ -6,7 +6,7 @@ dist: jammy
 os:
   - linux
 php:
-  - 8.0
   - 8.1
+  - 8.2
 before_install: "composer install"
 script: "vendor/bin/phpunit"
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/ApiException.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/ApiException.mustache
index 5a45a5f5dfd..42b90b02e07 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/ApiException.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/ApiException.mustache
@@ -1,7 +1,7 @@
 <?php
 /**
  * ApiException
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/Configuration.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/Configuration.mustache
index 4886d226332..7da0992466b 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/Configuration.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/Configuration.mustache
@@ -1,7 +1,7 @@
 <?php
 /**
  * Configuration
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/HeaderSelector.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/HeaderSelector.mustache
index 8f4cbc16b1d..a96501706b0 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/HeaderSelector.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/HeaderSelector.mustache
@@ -1,7 +1,7 @@
 <?php
 /**
  * HeaderSelector
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/ModelInterface.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/ModelInterface.mustache
index 1ae81b11998..4b0def70a90 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/ModelInterface.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/ModelInterface.mustache
@@ -2,7 +2,7 @@
 /**
  * ModelInterface
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{modelPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/ObjectSerializer.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/ObjectSerializer.mustache
index 65256d709f2..9c46077110b 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/ObjectSerializer.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/ObjectSerializer.mustache
@@ -2,7 +2,7 @@
 /**
  * ObjectSerializer
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/README.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/README.mustache
index 1954564a780..d419468b308 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/README.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/README.mustache
@@ -12,7 +12,7 @@ For more information, please visit [{{{infoUrl}}}]({{{infoUrl}}}).
 
 ### Requirements
 
-PHP 8.0 and later.
+PHP 8.1 and later.
 
 ### Composer
 
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/api.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/api.mustache
index ffefcac9e0e..f5d74acdd1c 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/api.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/api.mustache
@@ -1,7 +1,7 @@
 <?php
 /**
  * {{classname}}
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/api_test.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/api_test.mustache
index be9ac2b7ca8..70b47f7e04b 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/api_test.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/api_test.mustache
@@ -1,7 +1,7 @@
 <?php
 /**
  * {{classname}}Test
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/composer.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/composer.mustache
index e68bf85c5b8..5af5b032b5a 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/composer.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/composer.mustache
@@ -24,7 +24,7 @@
         }
     ],
     "require": {
-        "php": "^8.0",
+        "php": "^8.1",
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/model.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/model.mustache
index 49e342a19b5..b50114126bc 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/model.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/model.mustache
@@ -4,7 +4,7 @@
 /**
  * {{classname}}
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/modules/openapi-generator/src/main/resources/php-nextgen/model_test.mustache b/modules/openapi-generator/src/main/resources/php-nextgen/model_test.mustache
index e0fb4edab1e..4941e6b41d2 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/model_test.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/model_test.mustache
@@ -4,7 +4,7 @@
 /**
  * {{classname}}Test
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  {{invokerPackage}}
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/.travis.yml b/samples/client/petstore/php-nextgen/OpenAPIClient-php/.travis.yml
index 9d0fa66ff6c..707be2a11d5 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/.travis.yml
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/.travis.yml
@@ -6,7 +6,7 @@ dist: jammy
 os:
   - linux
 php:
-  - 8.0
   - 8.1
+  - 8.2
 before_install: "composer install"
 script: "vendor/bin/phpunit"
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/README.md b/samples/client/petstore/php-nextgen/OpenAPIClient-php/README.md
index 1daef015371..e64a5a4b49c 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/README.md
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/README.md
@@ -7,7 +7,7 @@ This spec is mainly for testing Petstore server and contains fake endpoints, mod
 
 ### Requirements
 
-PHP 8.0 and later.
+PHP 8.1 and later.
 
 ### Composer
 
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/composer.json b/samples/client/petstore/php-nextgen/OpenAPIClient-php/composer.json
index 7fb0aee0207..9f2182afa9f 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/composer.json
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/composer.json
@@ -18,7 +18,7 @@
         }
     ],
     "require": {
-        "php": "^8.0",
+        "php": "^8.1",
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/AnotherFakeApi.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/AnotherFakeApi.php
index fd37a62728b..2206e9a2024 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/AnotherFakeApi.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/AnotherFakeApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * AnotherFakeApi
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/DefaultApi.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/DefaultApi.php
index 86ceab4132f..7c5a10eb263 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/DefaultApi.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/DefaultApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * DefaultApi
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeApi.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeApi.php
index f42c0d5d258..3ee2e738229 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeApi.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * FakeApi
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeClassnameTags123Api.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeClassnameTags123Api.php
index 91d2dd82643..70c47191e2e 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeClassnameTags123Api.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/FakeClassnameTags123Api.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * FakeClassnameTags123Api
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/PetApi.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/PetApi.php
index 426c38445c0..7676dee8ab4 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/PetApi.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/PetApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * PetApi
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/StoreApi.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/StoreApi.php
index 1f4ff550451..904d710f318 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/StoreApi.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/StoreApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * StoreApi
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/UserApi.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/UserApi.php
index 73e4d83cf15..12603dd791e 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/UserApi.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Api/UserApi.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * UserApi
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ApiException.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ApiException.php
index 97681989505..048cf638bf9 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ApiException.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ApiException.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * ApiException
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Configuration.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Configuration.php
index 6890899a01b..ff0951a2225 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Configuration.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Configuration.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * Configuration
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/HeaderSelector.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/HeaderSelector.php
index f603a42971a..b6390af4bb3 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/HeaderSelector.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/HeaderSelector.php
@@ -1,7 +1,7 @@
 <?php
 /**
  * HeaderSelector
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AdditionalPropertiesClass.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AdditionalPropertiesClass.php
index ec2a58c3520..145d4affc91 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AdditionalPropertiesClass.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AdditionalPropertiesClass.php
@@ -2,7 +2,7 @@
 /**
  * AdditionalPropertiesClass
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AllOfWithSingleRef.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AllOfWithSingleRef.php
index cdcb3c6f43c..7a4f2445f31 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AllOfWithSingleRef.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/AllOfWithSingleRef.php
@@ -2,7 +2,7 @@
 /**
  * AllOfWithSingleRef
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Animal.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Animal.php
index bca9418eaa9..9f0c964013b 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Animal.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Animal.php
@@ -2,7 +2,7 @@
 /**
  * Animal
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ApiResponse.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ApiResponse.php
index d863f478b19..ce286af3024 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ApiResponse.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ApiResponse.php
@@ -2,7 +2,7 @@
 /**
  * ApiResponse
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfArrayOfNumberOnly.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfArrayOfNumberOnly.php
index 9c7228167c0..87f804f67e4 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfArrayOfNumberOnly.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfArrayOfNumberOnly.php
@@ -2,7 +2,7 @@
 /**
  * ArrayOfArrayOfNumberOnly
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfNumberOnly.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfNumberOnly.php
index 69a9f30cace..da1c1a6622f 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfNumberOnly.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayOfNumberOnly.php
@@ -2,7 +2,7 @@
 /**
  * ArrayOfNumberOnly
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayTest.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayTest.php
index a63dba2feca..e73fbb59a67 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayTest.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ArrayTest.php
@@ -2,7 +2,7 @@
 /**
  * ArrayTest
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Capitalization.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Capitalization.php
index 3d19a2d7a3a..f7221de6b11 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Capitalization.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Capitalization.php
@@ -2,7 +2,7 @@
 /**
  * Capitalization
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Cat.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Cat.php
index 56892a75179..0183dad2756 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Cat.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Cat.php
@@ -2,7 +2,7 @@
 /**
  * Cat
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Category.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Category.php
index dd4f77dbc33..7f70a293a09 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Category.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Category.php
@@ -2,7 +2,7 @@
 /**
  * Category
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ClassModel.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ClassModel.php
index d8b08947902..a2fc5f2c86d 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ClassModel.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ClassModel.php
@@ -2,7 +2,7 @@
 /**
  * ClassModel
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Client.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Client.php
index 110b7feea28..5b92fb7c992 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Client.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Client.php
@@ -2,7 +2,7 @@
 /**
  * Client
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DeprecatedObject.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DeprecatedObject.php
index 9c37007fc3f..2d78c59409b 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DeprecatedObject.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DeprecatedObject.php
@@ -2,7 +2,7 @@
 /**
  * DeprecatedObject
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Dog.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Dog.php
index 07d72bcabef..0849f774c4a 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Dog.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Dog.php
@@ -2,7 +2,7 @@
 /**
  * Dog
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumArrays.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumArrays.php
index b14f21671fe..e2c1bc834b7 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumArrays.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumArrays.php
@@ -2,7 +2,7 @@
 /**
  * EnumArrays
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumClass.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumClass.php
index 95332b886bc..3fa28382757 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumClass.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumClass.php
@@ -2,7 +2,7 @@
 /**
  * EnumClass
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumTest.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumTest.php
index 07fc5c2c11e..8bbef40fb09 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumTest.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/EnumTest.php
@@ -2,7 +2,7 @@
 /**
  * EnumTest
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FakeBigDecimalMap200Response.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FakeBigDecimalMap200Response.php
index 06a9f2b727b..8c58d57dc98 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FakeBigDecimalMap200Response.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FakeBigDecimalMap200Response.php
@@ -2,7 +2,7 @@
 /**
  * FakeBigDecimalMap200Response
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/File.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/File.php
index eb5e95a4511..8a8217ce05a 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/File.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/File.php
@@ -2,7 +2,7 @@
 /**
  * File
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FileSchemaTestClass.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FileSchemaTestClass.php
index e636aaa78d9..fce6e591535 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FileSchemaTestClass.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FileSchemaTestClass.php
@@ -2,7 +2,7 @@
 /**
  * FileSchemaTestClass
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Foo.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Foo.php
index 885ccd80588..24286e79b98 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Foo.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Foo.php
@@ -2,7 +2,7 @@
 /**
  * Foo
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FooGetDefaultResponse.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FooGetDefaultResponse.php
index c1ac8a4468b..84f920e618e 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FooGetDefaultResponse.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FooGetDefaultResponse.php
@@ -2,7 +2,7 @@
 /**
  * FooGetDefaultResponse
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FormatTest.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FormatTest.php
index 86c482442a9..b76ecad44e8 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FormatTest.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/FormatTest.php
@@ -2,7 +2,7 @@
 /**
  * FormatTest
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HasOnlyReadOnly.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HasOnlyReadOnly.php
index c529fa62cf3..7b7e3d028c9 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HasOnlyReadOnly.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HasOnlyReadOnly.php
@@ -2,7 +2,7 @@
 /**
  * HasOnlyReadOnly
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HealthCheckResult.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HealthCheckResult.php
index 3e846a8e476..9bc9e6937f4 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HealthCheckResult.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/HealthCheckResult.php
@@ -2,7 +2,7 @@
 /**
  * HealthCheckResult
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MapTest.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MapTest.php
index 24f77b0a8f8..f4003308271 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MapTest.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MapTest.php
@@ -2,7 +2,7 @@
 /**
  * MapTest
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MixedPropertiesAndAdditionalPropertiesClass.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MixedPropertiesAndAdditionalPropertiesClass.php
index 7d5412691fa..0028b5daa63 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MixedPropertiesAndAdditionalPropertiesClass.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/MixedPropertiesAndAdditionalPropertiesClass.php
@@ -2,7 +2,7 @@
 /**
  * MixedPropertiesAndAdditionalPropertiesClass
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Model200Response.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Model200Response.php
index 757fbe13920..0a5cdaa5267 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Model200Response.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Model200Response.php
@@ -2,7 +2,7 @@
 /**
  * Model200Response
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelInterface.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelInterface.php
index a58bc039175..125f6998e66 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelInterface.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelInterface.php
@@ -2,7 +2,7 @@
 /**
  * ModelInterface
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client\Model
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelList.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelList.php
index 3414ae8f257..bac4c2ac3d3 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelList.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelList.php
@@ -2,7 +2,7 @@
 /**
  * ModelList
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelReturn.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelReturn.php
index ca83ddd42e1..6e1b6da9ef7 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelReturn.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ModelReturn.php
@@ -2,7 +2,7 @@
 /**
  * ModelReturn
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Name.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Name.php
index ee868d467d5..8e1cfb06f0a 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Name.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Name.php
@@ -2,7 +2,7 @@
 /**
  * Name
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NullableClass.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NullableClass.php
index 85656969f5f..e5cd2620ef0 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NullableClass.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NullableClass.php
@@ -2,7 +2,7 @@
 /**
  * NullableClass
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NumberOnly.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NumberOnly.php
index ad03501582a..c5fcaefa68e 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NumberOnly.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/NumberOnly.php
@@ -2,7 +2,7 @@
 /**
  * NumberOnly
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ObjectWithDeprecatedFields.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ObjectWithDeprecatedFields.php
index f1cb6f433d8..8ae2a37551f 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ObjectWithDeprecatedFields.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ObjectWithDeprecatedFields.php
@@ -2,7 +2,7 @@
 /**
  * ObjectWithDeprecatedFields
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Order.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Order.php
index b4fb764045a..3178891e58e 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Order.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Order.php
@@ -2,7 +2,7 @@
 /**
  * Order
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterComposite.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterComposite.php
index f23dd7ff2d4..f31462bd4a7 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterComposite.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterComposite.php
@@ -2,7 +2,7 @@
 /**
  * OuterComposite
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnum.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnum.php
index 2560dbff41f..ff541c22882 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnum.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnum.php
@@ -2,7 +2,7 @@
 /**
  * OuterEnum
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumDefaultValue.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumDefaultValue.php
index 34971b8c3c4..09ce6f0f634 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumDefaultValue.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumDefaultValue.php
@@ -2,7 +2,7 @@
 /**
  * OuterEnumDefaultValue
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumInteger.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumInteger.php
index e4e64fb14bd..ba2f6c4df13 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumInteger.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumInteger.php
@@ -2,7 +2,7 @@
 /**
  * OuterEnumInteger
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumIntegerDefaultValue.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumIntegerDefaultValue.php
index d604aee34ae..8e870afe04b 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumIntegerDefaultValue.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterEnumIntegerDefaultValue.php
@@ -2,7 +2,7 @@
 /**
  * OuterEnumIntegerDefaultValue
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterObjectWithEnumProperty.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterObjectWithEnumProperty.php
index d2c22da9067..949df8c4b33 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterObjectWithEnumProperty.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/OuterObjectWithEnumProperty.php
@@ -2,7 +2,7 @@
 /**
  * OuterObjectWithEnumProperty
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Pet.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Pet.php
index 40d4e1b04cc..e82a042ede5 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Pet.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Pet.php
@@ -2,7 +2,7 @@
 /**
  * Pet
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ReadOnlyFirst.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ReadOnlyFirst.php
index 7ac1bff3c98..35fe4d4343b 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ReadOnlyFirst.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ReadOnlyFirst.php
@@ -2,7 +2,7 @@
 /**
  * ReadOnlyFirst
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SingleRefType.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SingleRefType.php
index e4e0ec8bf5d..59eb6481f84 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SingleRefType.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SingleRefType.php
@@ -2,7 +2,7 @@
 /**
  * SingleRefType
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SpecialModelName.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SpecialModelName.php
index 4c5cfbc80c1..a409f785eb8 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SpecialModelName.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/SpecialModelName.php
@@ -2,7 +2,7 @@
 /**
  * SpecialModelName
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Tag.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Tag.php
index f4564d70eb6..c8295601b84 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Tag.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/Tag.php
@@ -2,7 +2,7 @@
 /**
  * Tag
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/User.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/User.php
index 955d3285d21..c8a8f03df1c 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/User.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/User.php
@@ -2,7 +2,7 @@
 /**
  * User
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ObjectSerializer.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ObjectSerializer.php
index e235d585e7c..16097a025a9 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ObjectSerializer.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/ObjectSerializer.php
@@ -2,7 +2,7 @@
 /**
  * ObjectSerializer
  *
- * PHP version 8.0
+ * PHP version 8.1
  *
  * @category Class
  * @package  OpenAPI\Client