add property, parameter name mapping to php generators (#16206)

bin/configs/php-OpenAPIClient.yaml

@@ -1,4 +1,11 @@
 generatorName: php
 outputDir: samples/client/petstore/php/OpenAPIClient-php
-inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore-with-fake-endpoints-models-for-testing.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/php/petstore-with-fake-endpoints-models-for-testing.yaml
 templateDir: modules/openapi-generator/src/main/resources/php
+nameMappings:
+  _type: underscore_type
+  type_: type_with_underscore
+  type-: type_with_dash
+parameterNameMappings:
+  _type: underscore_type
+  type_: type_with_underscore

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractPhpCodegen.java

@@ -460,6 +460,11 @@ public abstract class AbstractPhpCodegen extends DefaultCodegen implements Codeg
 
     @Override
     public String toVarName(String name) {
+        // obtain the name from nameMapping directly if provided
+        if (nameMapping.containsKey(name)) {
+            return nameMapping.get(name);
+        }
+
         // translate @ for properties (like @type) to at_.
         // Otherwise an additional "type" property will leed to duplcates
         name = name.replaceAll("^@", "at_");
@@ -490,6 +495,11 @@ public abstract class AbstractPhpCodegen extends DefaultCodegen implements Codeg
 
     @Override
     public String toParamName(String name) {
+        // obtain the name from parameterNameMapping directly if provided
+        if (parameterNameMapping.containsKey(name)) {
+            return parameterNameMapping.get(name);
+        }
+
         // should be the same as variable name
         return toVarName(name);
     }

samples/client/petstore/php/OpenAPIClient-php/.openapi-generator/FILES

@@ -52,6 +52,7 @@ docs/Model/OuterEnumInteger.md
 docs/Model/OuterEnumIntegerDefaultValue.md
 docs/Model/OuterObjectWithEnumProperty.md
 docs/Model/Pet.md
+docs/Model/PropertyNameMapping.md
 docs/Model/ReadOnlyFirst.md
 docs/Model/SingleRefType.md
 docs/Model/SpecialModelName.md
@@ -111,6 +112,7 @@ lib/Model/OuterEnumInteger.php
 lib/Model/OuterEnumIntegerDefaultValue.php
 lib/Model/OuterObjectWithEnumProperty.php
 lib/Model/Pet.php
+lib/Model/PropertyNameMapping.php
 lib/Model/ReadOnlyFirst.php
 lib/Model/SingleRefType.php
 lib/Model/SpecialModelName.php

samples/client/petstore/php/OpenAPIClient-php/README.md

@@ -82,6 +82,7 @@ Class | Method | HTTP request | Description
 *FakeApi* | [**fakeOuterNumberSerialize**](docs/Api/FakeApi.md#fakeouternumberserialize) | **POST** /fake/outer/number | 
 *FakeApi* | [**fakeOuterStringSerialize**](docs/Api/FakeApi.md#fakeouterstringserialize) | **POST** /fake/outer/string | 
 *FakeApi* | [**fakePropertyEnumIntegerSerialize**](docs/Api/FakeApi.md#fakepropertyenumintegerserialize) | **POST** /fake/property/enum-int | 
+*FakeApi* | [**getParameterNameMapping**](docs/Api/FakeApi.md#getparameternamemapping) | **GET** /fake/parameter-name-mapping | parameter name mapping test
 *FakeApi* | [**testBodyWithBinary**](docs/Api/FakeApi.md#testbodywithbinary) | **PUT** /fake/body-with-binary | 
 *FakeApi* | [**testBodyWithFileSchema**](docs/Api/FakeApi.md#testbodywithfileschema) | **PUT** /fake/body-with-file-schema | 
 *FakeApi* | [**testBodyWithQueryParams**](docs/Api/FakeApi.md#testbodywithqueryparams) | **PUT** /fake/body-with-query-params | 
@@ -159,6 +160,7 @@ Class | Method | HTTP request | Description
 - [OuterEnumIntegerDefaultValue](docs/Model/OuterEnumIntegerDefaultValue.md)
 - [OuterObjectWithEnumProperty](docs/Model/OuterObjectWithEnumProperty.md)
 - [Pet](docs/Model/Pet.md)
+- [PropertyNameMapping](docs/Model/PropertyNameMapping.md)
 - [ReadOnlyFirst](docs/Model/ReadOnlyFirst.md)
 - [SingleRefType](docs/Model/SingleRefType.md)
 - [SpecialModelName](docs/Model/SpecialModelName.md)

samples/client/petstore/php/OpenAPIClient-php/docs/Api/FakeApi.md

@@ -12,6 +12,7 @@ All URIs are relative to http://petstore.swagger.io:80/v2, except if the operati
 | [**fakeOuterNumberSerialize()**](FakeApi.md#fakeOuterNumberSerialize) | **POST** /fake/outer/number |  |
 | [**fakeOuterStringSerialize()**](FakeApi.md#fakeOuterStringSerialize) | **POST** /fake/outer/string |  |
 | [**fakePropertyEnumIntegerSerialize()**](FakeApi.md#fakePropertyEnumIntegerSerialize) | **POST** /fake/property/enum-int |  |
+| [**getParameterNameMapping()**](FakeApi.md#getParameterNameMapping) | **GET** /fake/parameter-name-mapping | parameter name mapping test |
 | [**testBodyWithBinary()**](FakeApi.md#testBodyWithBinary) | **PUT** /fake/body-with-binary |  |
 | [**testBodyWithFileSchema()**](FakeApi.md#testBodyWithFileSchema) | **PUT** /fake/body-with-file-schema |  |
 | [**testBodyWithQueryParams()**](FakeApi.md#testBodyWithQueryParams) | **PUT** /fake/body-with-query-params |  |
@@ -467,6 +468,67 @@ No authorization required
 [[Back to Model list]](../../README.md#models)
 [[Back to README]](../../README.md)
 
+## `getParameterNameMapping()`
+
+```php
+getParameterNameMapping($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option)
+```
+
+parameter name mapping test
+
+### Example
+
+```php
+<?php
+require_once(__DIR__ . '/vendor/autoload.php');
+
+
+
+$apiInstance = new OpenAPI\Client\Api\FakeApi(
+    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
+    // This is optional, `GuzzleHttp\Client` will be used as default.
+    new GuzzleHttp\Client()
+);
+$underscore_type = 56; // int | _type
+$type = 'type_example'; // string | type
+$type_with_underscore = 'type_with_underscore_example'; // string | type_
+$type_with_dash = 'type_with_dash_example'; // string | type-
+$http_debug_option = 'http_debug_option_example'; // string | http debug option (to test parameter naming option)
+
+try {
+    $apiInstance->getParameterNameMapping($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option);
+} catch (Exception $e) {
+    echo 'Exception when calling FakeApi->getParameterNameMapping: ', $e->getMessage(), PHP_EOL;
+}
+```
+
+### Parameters
+
+| Name | Type | Description  | Notes |
+| ------------- | ------------- | ------------- | ------------- |
+| **underscore_type** | **int**| _type | |
+| **type** | **string**| type | |
+| **type_with_underscore** | **string**| type_ | |
+| **type_with_dash** | **string**| type- | |
+| **http_debug_option** | **string**| http debug option (to test parameter naming option) | |
+
+### Return type
+
+void (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+- **Content-Type**: Not defined
+- **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../../README.md#endpoints)
+[[Back to Model list]](../../README.md#models)
+[[Back to README]](../../README.md)
+
 ## `testBodyWithBinary()`
 
 ```php

samples/client/petstore/php/OpenAPIClient-php/docs/Model/PropertyNameMapping.md

@@ -0,0 +1,12 @@
+# # PropertyNameMapping
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**http_debug_operation** | **string** |  | [optional]
+**underscore_type** | **string** |  | [optional]
+**type** | **string** |  | [optional]
+**type_with_underscore** | **string** |  | [optional]
+
+[[Back to Model list]](../../README.md#models) [[Back to API list]](../../README.md#endpoints) [[Back to README]](../../README.md)

samples/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php

@@ -96,6 +96,9 @@ class FakeApi
         'fakePropertyEnumIntegerSerialize' => [
             'application/json',
         ],
+        'getParameterNameMapping' => [
+            'application/json',
+        ],
         'testBodyWithBinary' => [
             'image/png',
         ],
@@ -2291,6 +2294,305 @@ class FakeApi
         );
     }
 
+    /**
+     * Operation getParameterNameMapping
+     *
+     * parameter name mapping test
+     *
+     * @param  int $underscore_type _type (required)
+     * @param  string $type type (required)
+     * @param  string $type_with_underscore type_ (required)
+     * @param  string $type_with_dash type- (required)
+     * @param  string $http_debug_option http debug option (to test parameter naming option) (required)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['getParameterNameMapping'] to see the possible values for this operation
+     *
+     * @throws \OpenAPI\Client\ApiException on non-2xx response
+     * @throws \InvalidArgumentException
+     * @return void
+     */
+    public function getParameterNameMapping($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, string $contentType = self::contentTypes['getParameterNameMapping'][0])
+    {
+        $this->getParameterNameMappingWithHttpInfo($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, $contentType);
+    }
+
+    /**
+     * Operation getParameterNameMappingWithHttpInfo
+     *
+     * parameter name mapping test
+     *
+     * @param  int $underscore_type _type (required)
+     * @param  string $type type (required)
+     * @param  string $type_with_underscore type_ (required)
+     * @param  string $type_with_dash type- (required)
+     * @param  string $http_debug_option http debug option (to test parameter naming option) (required)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['getParameterNameMapping'] to see the possible values for this operation
+     *
+     * @throws \OpenAPI\Client\ApiException on non-2xx response
+     * @throws \InvalidArgumentException
+     * @return array of null, HTTP status code, HTTP response headers (array of strings)
+     */
+    public function getParameterNameMappingWithHttpInfo($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, string $contentType = self::contentTypes['getParameterNameMapping'][0])
+    {
+        $request = $this->getParameterNameMappingRequest($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, $contentType);
+
+        try {
+            $options = $this->createHttpClientOption();
+            try {
+                $response = $this->client->send($request, $options);
+            } catch (RequestException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
+                    $e->getResponse() ? (string) $e->getResponse()->getBody() : null
+                );
+            } catch (ConnectException $e) {
+                throw new ApiException(
+                    "[{$e->getCode()}] {$e->getMessage()}",
+                    (int) $e->getCode(),
+                    null,
+                    null
+                );
+            }
+
+            $statusCode = $response->getStatusCode();
+
+            if ($statusCode < 200 || $statusCode > 299) {
+                throw new ApiException(
+                    sprintf(
+                        '[%d] Error connecting to the API (%s)',
+                        $statusCode,
+                        (string) $request->getUri()
+                    ),
+                    $statusCode,
+                    $response->getHeaders(),
+                    (string) $response->getBody()
+                );
+            }
+
+            return [null, $statusCode, $response->getHeaders()];
+
+        } catch (ApiException $e) {
+            switch ($e->getCode()) {
+            }
+            throw $e;
+        }
+    }
+
+    /**
+     * Operation getParameterNameMappingAsync
+     *
+     * parameter name mapping test
+     *
+     * @param  int $underscore_type _type (required)
+     * @param  string $type type (required)
+     * @param  string $type_with_underscore type_ (required)
+     * @param  string $type_with_dash type- (required)
+     * @param  string $http_debug_option http debug option (to test parameter naming option) (required)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['getParameterNameMapping'] to see the possible values for this operation
+     *
+     * @throws \InvalidArgumentException
+     * @return \GuzzleHttp\Promise\PromiseInterface
+     */
+    public function getParameterNameMappingAsync($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, string $contentType = self::contentTypes['getParameterNameMapping'][0])
+    {
+        return $this->getParameterNameMappingAsyncWithHttpInfo($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, $contentType)
+            ->then(
+                function ($response) {
+                    return $response[0];
+                }
+            );
+    }
+
+    /**
+     * Operation getParameterNameMappingAsyncWithHttpInfo
+     *
+     * parameter name mapping test
+     *
+     * @param  int $underscore_type _type (required)
+     * @param  string $type type (required)
+     * @param  string $type_with_underscore type_ (required)
+     * @param  string $type_with_dash type- (required)
+     * @param  string $http_debug_option http debug option (to test parameter naming option) (required)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['getParameterNameMapping'] to see the possible values for this operation
+     *
+     * @throws \InvalidArgumentException
+     * @return \GuzzleHttp\Promise\PromiseInterface
+     */
+    public function getParameterNameMappingAsyncWithHttpInfo($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, string $contentType = self::contentTypes['getParameterNameMapping'][0])
+    {
+        $returnType = '';
+        $request = $this->getParameterNameMappingRequest($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, $contentType);
+
+        return $this->client
+            ->sendAsync($request, $this->createHttpClientOption())
+            ->then(
+                function ($response) use ($returnType) {
+                    return [null, $response->getStatusCode(), $response->getHeaders()];
+                },
+                function ($exception) {
+                    $response = $exception->getResponse();
+                    $statusCode = $response->getStatusCode();
+                    throw new ApiException(
+                        sprintf(
+                            '[%d] Error connecting to the API (%s)',
+                            $statusCode,
+                            $exception->getRequest()->getUri()
+                        ),
+                        $statusCode,
+                        $response->getHeaders(),
+                        (string) $response->getBody()
+                    );
+                }
+            );
+    }
+
+    /**
+     * Create request for operation 'getParameterNameMapping'
+     *
+     * @param  int $underscore_type _type (required)
+     * @param  string $type type (required)
+     * @param  string $type_with_underscore type_ (required)
+     * @param  string $type_with_dash type- (required)
+     * @param  string $http_debug_option http debug option (to test parameter naming option) (required)
+     * @param  string $contentType The value for the Content-Type header. Check self::contentTypes['getParameterNameMapping'] to see the possible values for this operation
+     *
+     * @throws \InvalidArgumentException
+     * @return \GuzzleHttp\Psr7\Request
+     */
+    public function getParameterNameMappingRequest($underscore_type, $type, $type_with_underscore, $type_with_dash, $http_debug_option, string $contentType = self::contentTypes['getParameterNameMapping'][0])
+    {
+
+        // verify the required parameter 'underscore_type' is set
+        if ($underscore_type === null || (is_array($underscore_type) && count($underscore_type) === 0)) {
+            throw new \InvalidArgumentException(
+                'Missing the required parameter $underscore_type when calling getParameterNameMapping'
+            );
+        }
+
+        // verify the required parameter 'type' is set
+        if ($type === null || (is_array($type) && count($type) === 0)) {
+            throw new \InvalidArgumentException(
+                'Missing the required parameter $type when calling getParameterNameMapping'
+            );
+        }
+
+        // verify the required parameter 'type_with_underscore' is set
+        if ($type_with_underscore === null || (is_array($type_with_underscore) && count($type_with_underscore) === 0)) {
+            throw new \InvalidArgumentException(
+                'Missing the required parameter $type_with_underscore when calling getParameterNameMapping'
+            );
+        }
+
+        // verify the required parameter 'type_with_dash' is set
+        if ($type_with_dash === null || (is_array($type_with_dash) && count($type_with_dash) === 0)) {
+            throw new \InvalidArgumentException(
+                'Missing the required parameter $type_with_dash when calling getParameterNameMapping'
+            );
+        }
+
+        // verify the required parameter 'http_debug_option' is set
+        if ($http_debug_option === null || (is_array($http_debug_option) && count($http_debug_option) === 0)) {
+            throw new \InvalidArgumentException(
+                'Missing the required parameter $http_debug_option when calling getParameterNameMapping'
+            );
+        }
+
+
+        $resourcePath = '/fake/parameter-name-mapping';
+        $formParams = [];
+        $queryParams = [];
+        $headerParams = [];
+        $httpBody = '';
+        $multipart = false;
+
+        // query params
+        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
+            $type,
+            'type', // param base name
+            'string', // openApiType
+            'form', // style
+            true, // explode
+            true // required
+        ) ?? []);
+        // query params
+        $queryParams = array_merge($queryParams, ObjectSerializer::toQueryValue(
+            $http_debug_option,
+            'http_debug_option', // param base name
+            'string', // openApiType
+            'form', // style
+            true, // explode
+            true // required
+        ) ?? []);
+
+        // header params
+        if ($underscore_type !== null) {
+            $headerParams['_type'] = ObjectSerializer::toHeaderValue($underscore_type);
+        }
+        // header params
+        if ($type_with_underscore !== null) {
+            $headerParams['type_'] = ObjectSerializer::toHeaderValue($type_with_underscore);
+        }
+        // header params
+        if ($type_with_dash !== null) {
+            $headerParams['type-'] = ObjectSerializer::toHeaderValue($type_with_dash);
+        }
+
+
+
+        $headers = $this->headerSelector->selectHeaders(
+            [],
+            $contentType,
+            $multipart
+        );
+
+        // for model (json/xml)
+        if (count($formParams) > 0) {
+            if ($multipart) {
+                $multipartContents = [];
+                foreach ($formParams as $formParamName => $formParamValue) {
+                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
+                    foreach ($formParamValueItems as $formParamValueItem) {
+                        $multipartContents[] = [
+                            'name' => $formParamName,
+                            'contents' => $formParamValueItem
+                        ];
+                    }
+                }
+                // for HTTP post (form)
+                $httpBody = new MultipartStream($multipartContents);
+
+            } elseif (stripos($headers['Content-Type'], 'application/json') !== false) {
+                # if Content-Type contains "application/json", json_encode the form parameters
+                $httpBody = \GuzzleHttp\Utils::jsonEncode($formParams);
+            } else {
+                // for HTTP post (form)
+                $httpBody = ObjectSerializer::buildQuery($formParams);
+            }
+        }
+
+
+        $defaultHeaders = [];
+        if ($this->config->getUserAgent()) {
+            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
+        }
+
+        $headers = array_merge(
+            $defaultHeaders,
+            $headerParams,
+            $headers
+        );
+
+        $operationHost = $this->config->getHost();
+        $query = ObjectSerializer::buildQuery($queryParams);
+        return new Request(
+            'GET',
+            $operationHost . $resourcePath . ($query ? "?{$query}" : ''),
+            $headers,
+            $httpBody
+        );
+    }
+
     /**
      * Operation testBodyWithBinary
      *

samples/client/petstore/php/OpenAPIClient-php/lib/Model/PropertyNameMapping.php

@@ -0,0 +1,511 @@
+<?php
+/**
+ * PropertyNameMapping
+ *
+ * PHP version 7.4
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://openapi-generator.tech
+ * OpenAPI Generator version: 7.0.0-SNAPSHOT
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+
+namespace OpenAPI\Client\Model;
+
+use \ArrayAccess;
+use \OpenAPI\Client\ObjectSerializer;
+
+/**
+ * PropertyNameMapping Class Doc Comment
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ * @implements \ArrayAccess<string, mixed>
+ */
+class PropertyNameMapping implements ModelInterface, ArrayAccess, \JsonSerializable
+{
+    public const DISCRIMINATOR = null;
+
+    /**
+      * The original name of the model.
+      *
+      * @var string
+      */
+    protected static $openAPIModelName = 'PropertyNameMapping';
+
+    /**
+      * Array of property to type mappings. Used for (de)serialization
+      *
+      * @var string[]
+      */
+    protected static $openAPITypes = [
+        'http_debug_operation' => 'string',
+        'underscore_type' => 'string',
+        'type' => 'string',
+        'type_with_underscore' => 'string'
+    ];
+
+    /**
+      * Array of property to format mappings. Used for (de)serialization
+      *
+      * @var string[]
+      * @phpstan-var array<string, string|null>
+      * @psalm-var array<string, string|null>
+      */
+    protected static $openAPIFormats = [
+        'http_debug_operation' => null,
+        'underscore_type' => null,
+        'type' => null,
+        'type_with_underscore' => null
+    ];
+
+    /**
+      * Array of nullable properties. Used for (de)serialization
+      *
+      * @var boolean[]
+      */
+    protected static array $openAPINullables = [
+        'http_debug_operation' => false,
+		'underscore_type' => false,
+		'type' => false,
+		'type_with_underscore' => false
+    ];
+
+    /**
+      * If a nullable field gets set to null, insert it here
+      *
+      * @var boolean[]
+      */
+    protected array $openAPINullablesSetToNull = [];
+
+    /**
+     * Array of property to type mappings. Used for (de)serialization
+     *
+     * @return array
+     */
+    public static function openAPITypes()
+    {
+        return self::$openAPITypes;
+    }
+
+    /**
+     * Array of property to format mappings. Used for (de)serialization
+     *
+     * @return array
+     */
+    public static function openAPIFormats()
+    {
+        return self::$openAPIFormats;
+    }
+
+    /**
+     * Array of nullable properties
+     *
+     * @return array
+     */
+    protected static function openAPINullables(): array
+    {
+        return self::$openAPINullables;
+    }
+
+    /**
+     * Array of nullable field names deliberately set to null
+     *
+     * @return boolean[]
+     */
+    private function getOpenAPINullablesSetToNull(): array
+    {
+        return $this->openAPINullablesSetToNull;
+    }
+
+    /**
+     * Setter - Array of nullable field names deliberately set to null
+     *
+     * @param boolean[] $openAPINullablesSetToNull
+     */
+    private function setOpenAPINullablesSetToNull(array $openAPINullablesSetToNull): void
+    {
+        $this->openAPINullablesSetToNull = $openAPINullablesSetToNull;
+    }
+
+    /**
+     * Checks if a property is nullable
+     *
+     * @param string $property
+     * @return bool
+     */
+    public static function isNullable(string $property): bool
+    {
+        return self::openAPINullables()[$property] ?? false;
+    }
+
+    /**
+     * Checks if a nullable property is set to null.
+     *
+     * @param string $property
+     * @return bool
+     */
+    public function isNullableSetToNull(string $property): bool
+    {
+        return in_array($property, $this->getOpenAPINullablesSetToNull(), true);
+    }
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name
+     *
+     * @var string[]
+     */
+    protected static $attributeMap = [
+        'http_debug_operation' => 'http_debug_operation',
+        'underscore_type' => '_type',
+        'type' => 'type',
+        'type_with_underscore' => 'type_'
+    ];
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses)
+     *
+     * @var string[]
+     */
+    protected static $setters = [
+        'http_debug_operation' => 'setHttpDebugOperation',
+        'underscore_type' => 'setUnderscoreType',
+        'type' => 'setType',
+        'type_with_underscore' => 'setTypeWithUnderscore'
+    ];
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests)
+     *
+     * @var string[]
+     */
+    protected static $getters = [
+        'http_debug_operation' => 'getHttpDebugOperation',
+        'underscore_type' => 'getUnderscoreType',
+        'type' => 'getType',
+        'type_with_underscore' => 'getTypeWithUnderscore'
+    ];
+
+    /**
+     * Array of attributes where the key is the local name,
+     * and the value is the original name
+     *
+     * @return array
+     */
+    public static function attributeMap()
+    {
+        return self::$attributeMap;
+    }
+
+    /**
+     * Array of attributes to setter functions (for deserialization of responses)
+     *
+     * @return array
+     */
+    public static function setters()
+    {
+        return self::$setters;
+    }
+
+    /**
+     * Array of attributes to getter functions (for serialization of requests)
+     *
+     * @return array
+     */
+    public static function getters()
+    {
+        return self::$getters;
+    }
+
+    /**
+     * The original name of the model.
+     *
+     * @return string
+     */
+    public function getModelName()
+    {
+        return self::$openAPIModelName;
+    }
+
+
+    /**
+     * Associative array for storing property values
+     *
+     * @var mixed[]
+     */
+    protected $container = [];
+
+    /**
+     * Constructor
+     *
+     * @param mixed[] $data Associated array of property values
+     *                      initializing the model
+     */
+    public function __construct(array $data = null)
+    {
+        $this->setIfExists('http_debug_operation', $data ?? [], null);
+        $this->setIfExists('underscore_type', $data ?? [], null);
+        $this->setIfExists('type', $data ?? [], null);
+        $this->setIfExists('type_with_underscore', $data ?? [], null);
+    }
+
+    /**
+    * Sets $this->container[$variableName] to the given data or to the given default Value; if $variableName
+    * is nullable and its value is set to null in the $fields array, then mark it as "set to null" in the
+    * $this->openAPINullablesSetToNull array
+    *
+    * @param string $variableName
+    * @param array  $fields
+    * @param mixed  $defaultValue
+    */
+    private function setIfExists(string $variableName, array $fields, $defaultValue): void
+    {
+        if (self::isNullable($variableName) && array_key_exists($variableName, $fields) && is_null($fields[$variableName])) {
+            $this->openAPINullablesSetToNull[] = $variableName;
+        }
+
+        $this->container[$variableName] = $fields[$variableName] ?? $defaultValue;
+    }
+
+    /**
+     * Show all the invalid properties with reasons.
+     *
+     * @return array invalid properties with reasons
+     */
+    public function listInvalidProperties()
+    {
+        $invalidProperties = [];
+
+        return $invalidProperties;
+    }
+
+    /**
+     * Validate all the properties in the model
+     * return true if all passed
+     *
+     * @return bool True if all properties are valid
+     */
+    public function valid()
+    {
+        return count($this->listInvalidProperties()) === 0;
+    }
+
+
+    /**
+     * Gets http_debug_operation
+     *
+     * @return string|null
+     */
+    public function getHttpDebugOperation()
+    {
+        return $this->container['http_debug_operation'];
+    }
+
+    /**
+     * Sets http_debug_operation
+     *
+     * @param string|null $http_debug_operation http_debug_operation
+     *
+     * @return self
+     */
+    public function setHttpDebugOperation($http_debug_operation)
+    {
+        if (is_null($http_debug_operation)) {
+            throw new \InvalidArgumentException('non-nullable http_debug_operation cannot be null');
+        }
+        $this->container['http_debug_operation'] = $http_debug_operation;
+
+        return $this;
+    }
+
+    /**
+     * Gets underscore_type
+     *
+     * @return string|null
+     */
+    public function getUnderscoreType()
+    {
+        return $this->container['underscore_type'];
+    }
+
+    /**
+     * Sets underscore_type
+     *
+     * @param string|null $underscore_type underscore_type
+     *
+     * @return self
+     */
+    public function setUnderscoreType($underscore_type)
+    {
+        if (is_null($underscore_type)) {
+            throw new \InvalidArgumentException('non-nullable underscore_type cannot be null');
+        }
+        $this->container['underscore_type'] = $underscore_type;
+
+        return $this;
+    }
+
+    /**
+     * Gets type
+     *
+     * @return string|null
+     */
+    public function getType()
+    {
+        return $this->container['type'];
+    }
+
+    /**
+     * Sets type
+     *
+     * @param string|null $type type
+     *
+     * @return self
+     */
+    public function setType($type)
+    {
+        if (is_null($type)) {
+            throw new \InvalidArgumentException('non-nullable type cannot be null');
+        }
+        $this->container['type'] = $type;
+
+        return $this;
+    }
+
+    /**
+     * Gets type_with_underscore
+     *
+     * @return string|null
+     */
+    public function getTypeWithUnderscore()
+    {
+        return $this->container['type_with_underscore'];
+    }
+
+    /**
+     * Sets type_with_underscore
+     *
+     * @param string|null $type_with_underscore type_with_underscore
+     *
+     * @return self
+     */
+    public function setTypeWithUnderscore($type_with_underscore)
+    {
+        if (is_null($type_with_underscore)) {
+            throw new \InvalidArgumentException('non-nullable type_with_underscore cannot be null');
+        }
+        $this->container['type_with_underscore'] = $type_with_underscore;
+
+        return $this;
+    }
+    /**
+     * Returns true if offset exists. False otherwise.
+     *
+     * @param integer $offset Offset
+     *
+     * @return boolean
+     */
+    public function offsetExists($offset): bool
+    {
+        return isset($this->container[$offset]);
+    }
+
+    /**
+     * Gets offset.
+     *
+     * @param integer $offset Offset
+     *
+     * @return mixed|null
+     */
+    #[\ReturnTypeWillChange]
+    public function offsetGet($offset)
+    {
+        return $this->container[$offset] ?? null;
+    }
+
+    /**
+     * Sets value based on offset.
+     *
+     * @param int|null $offset Offset
+     * @param mixed    $value  Value to be set
+     *
+     * @return void
+     */
+    public function offsetSet($offset, $value): void
+    {
+        if (is_null($offset)) {
+            $this->container[] = $value;
+        } else {
+            $this->container[$offset] = $value;
+        }
+    }
+
+    /**
+     * Unsets offset.
+     *
+     * @param integer $offset Offset
+     *
+     * @return void
+     */
+    public function offsetUnset($offset): void
+    {
+        unset($this->container[$offset]);
+    }
+
+    /**
+     * Serializes the object to a value that can be serialized natively by json_encode().
+     * @link https://www.php.net/manual/en/jsonserializable.jsonserialize.php
+     *
+     * @return mixed Returns data which can be serialized by json_encode(), which is a value
+     * of any type other than a resource.
+     */
+    #[\ReturnTypeWillChange]
+    public function jsonSerialize()
+    {
+       return ObjectSerializer::sanitizeForSerialization($this);
+    }
+
+    /**
+     * Gets the string presentation of the object
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return json_encode(
+            ObjectSerializer::sanitizeForSerialization($this),
+            JSON_PRETTY_PRINT
+        );
+    }
+
+    /**
+     * Gets a header-safe presentation of the object
+     *
+     * @return string
+     */
+    public function toHeaderValue()
+    {
+        return json_encode(ObjectSerializer::sanitizeForSerialization($this));
+    }
+}
+
+

samples/client/petstore/php/OpenAPIClient-php/test/Model/PropertyNameMappingTest.php

@@ -0,0 +1,117 @@
+<?php
+/**
+ * PropertyNameMappingTest
+ *
+ * PHP version 7.4
+ *
+ * @category Class
+ * @package  OpenAPI\Client
+ * @author   OpenAPI Generator team
+ * @link     https://openapi-generator.tech
+ */
+
+/**
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * The version of the OpenAPI document: 1.0.0
+ * Generated by: https://openapi-generator.tech
+ * OpenAPI Generator version: 7.0.0-SNAPSHOT
+ */
+
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
+ * https://openapi-generator.tech
+ * Please update the test case below to test the model.
+ */
+
+namespace OpenAPI\Client\Test\Model;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * PropertyNameMappingTest Class Doc Comment
+ *
+ * @category    Class
+ * @description PropertyNameMapping
+ * @package     OpenAPI\Client
+ * @author      OpenAPI Generator team
+ * @link        https://openapi-generator.tech
+ */
+class PropertyNameMappingTest extends TestCase
+{
+
+    /**
+     * Setup before running any test case
+     */
+    public static function setUpBeforeClass(): void
+    {
+    }
+
+    /**
+     * Setup before running each test case
+     */
+    public function setUp(): void
+    {
+    }
+
+    /**
+     * Clean up after running each test case
+     */
+    public function tearDown(): void
+    {
+    }
+
+    /**
+     * Clean up after running all test cases
+     */
+    public static function tearDownAfterClass(): void
+    {
+    }
+
+    /**
+     * Test "PropertyNameMapping"
+     */
+    public function testPropertyNameMapping()
+    {
+        // TODO: implement
+        $this->markTestIncomplete('Not implemented');
+    }
+
+    /**
+     * Test attribute "http_debug_operation"
+     */
+    public function testPropertyHttpDebugOperation()
+    {
+        // TODO: implement
+        $this->markTestIncomplete('Not implemented');
+    }
+
+    /**
+     * Test attribute "underscore_type"
+     */
+    public function testPropertyUnderscoreType()
+    {
+        // TODO: implement
+        $this->markTestIncomplete('Not implemented');
+    }
+
+    /**
+     * Test attribute "type"
+     */
+    public function testPropertyType()
+    {
+        // TODO: implement
+        $this->markTestIncomplete('Not implemented');
+    }
+
+    /**
+     * Test attribute "type_with_underscore"
+     */
+    public function testPropertyTypeWithUnderscore()
+    {
+        // TODO: implement
+        $this->markTestIncomplete('Not implemented');
+    }
+}