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 5805f76096c0..48f7a3fb8a6c 100644
--- a/modules/openapi-generator/src/main/resources/php-nextgen/model.mustache
+++ b/modules/openapi-generator/src/main/resources/php-nextgen/model.mustache
@@ -21,14 +21,14 @@
 
 namespace {{modelPackage}};
 {{^isEnum}}
-{{^parentSchema}}
 
+{{^parentSchema}}
 use ArrayAccess;
 use JsonSerializable;
+{{/parentSchema}}
 use InvalidArgumentException;
 use ReturnTypeWillChange;
 use {{invokerPackage}}\ObjectSerializer;
-{{/parentSchema}}
 {{/isEnum}}
 
 /**
diff --git a/samples/client/echo_api/php-nextgen-streaming/src/Model/DataQuery.php b/samples/client/echo_api/php-nextgen-streaming/src/Model/DataQuery.php
index b37807653c81..01362f1a0c72 100644
--- a/samples/client/echo_api/php-nextgen-streaming/src/Model/DataQuery.php
+++ b/samples/client/echo_api/php-nextgen-streaming/src/Model/DataQuery.php
@@ -28,6 +28,10 @@
 
 namespace OpenAPI\Client\Model;
 
+use InvalidArgumentException;
+use ReturnTypeWillChange;
+use OpenAPI\Client\ObjectSerializer;
+
 /**
  * DataQuery Class Doc Comment
  *
diff --git a/samples/client/echo_api/php-nextgen/src/Model/DataQuery.php b/samples/client/echo_api/php-nextgen/src/Model/DataQuery.php
index b37807653c81..01362f1a0c72 100644
--- a/samples/client/echo_api/php-nextgen/src/Model/DataQuery.php
+++ b/samples/client/echo_api/php-nextgen/src/Model/DataQuery.php
@@ -28,6 +28,10 @@
 
 namespace OpenAPI\Client\Model;
 
+use InvalidArgumentException;
+use ReturnTypeWillChange;
+use OpenAPI\Client\ObjectSerializer;
+
 /**
  * DataQuery Class Doc Comment
  *
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 222b077b4bd1..d7d52ee2d45d 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
@@ -27,6 +27,10 @@
 
 namespace OpenAPI\Client\Model;
 
+use InvalidArgumentException;
+use ReturnTypeWillChange;
+use OpenAPI\Client\ObjectSerializer;
+
 /**
  * Cat Class Doc Comment
  *
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ChildWithNullable.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ChildWithNullable.php
index 5512997f3012..8cd80b49f04f 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ChildWithNullable.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/ChildWithNullable.php
@@ -27,6 +27,10 @@
 
 namespace OpenAPI\Client\Model;
 
+use InvalidArgumentException;
+use ReturnTypeWillChange;
+use OpenAPI\Client\ObjectSerializer;
+
 /**
  * ChildWithNullable Class Doc Comment
  *
diff --git a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DiscriminatorChild.php b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DiscriminatorChild.php
index 534cd723ff0e..a41e4f377f2b 100644
--- a/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DiscriminatorChild.php
+++ b/samples/client/petstore/php-nextgen/OpenAPIClient-php/src/Model/DiscriminatorChild.php
@@ -27,6 +27,10 @@
 
 namespace OpenAPI\Client\Model;
 
+use InvalidArgumentException;
+use ReturnTypeWillChange;
+use OpenAPI\Client\ObjectSerializer;
+
 /**
  * DiscriminatorChild Class Doc Comment
  *
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 584ddbf47075..a8529073c89b 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
@@ -27,6 +27,10 @@
 
 namespace OpenAPI\Client\Model;
 
+use InvalidArgumentException;
+use ReturnTypeWillChange;
+use OpenAPI\Client\ObjectSerializer;
+
 /**
  * Dog Class Doc Comment
  *