fix: declare property headerSelector (#7495)

The property was created dynamically, it's a more clean approach to
declare it as a member of the class.

modules/swagger-codegen/src/main/resources/php/api.mustache

@@ -49,6 +49,11 @@ use {{invokerPackage}}\ObjectSerializer;
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config

samples/client/petstore-security-test/php/SwaggerClient-php/lib/Api/FakeApi.php

@@ -59,6 +59,11 @@ class FakeApi
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config

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

@@ -379,11 +379,11 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **enum_form_string_array** | **string[]**| Form parameter enum test (string array) | [optional]
+ **enum_form_string_array** | [**string[]**](../Model/string.md)| Form parameter enum test (string array) | [optional]
  **enum_form_string** | **string**| Form parameter enum test (string) | [optional] [default to -efg]
- **enum_header_string_array** | **string[]**| Header parameter enum test (string array) | [optional]
+ **enum_header_string_array** | [**string[]**](../Model/string.md)| Header parameter enum test (string array) | [optional]
  **enum_header_string** | **string**| Header parameter enum test (string) | [optional] [default to -efg]
- **enum_query_string_array** | **string[]**| Query parameter enum test (string array) | [optional]
+ **enum_query_string_array** | [**string[]**](../Model/string.md)| Query parameter enum test (string array) | [optional]
  **enum_query_string** | **string**| Query parameter enum test (string) | [optional] [default to -efg]
  **enum_query_integer** | **int**| Query parameter enum test (double) | [optional]
  **enum_query_double** | **double**| Query parameter enum test (double) | [optional]

samples/client/petstore/php/SwaggerClient-php/docs/Api/PetApi.md

@@ -156,7 +156,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **status** | **string[]**| Status values that need to be considered for filter |
+ **status** | [**string[]**](../Model/string.md)| Status values that need to be considered for filter |
 
 ### Return type
 
@@ -209,7 +209,7 @@ try {
 
 Name | Type | Description  | Notes
 ------------- | ------------- | ------------- | -------------
- **tags** | **string[]**| Tags to filter by |
+ **tags** | [**string[]**](../Model/string.md)| Tags to filter by |
 
 ### Return type
 

samples/client/petstore/php/SwaggerClient-php/lib/Api/AnotherFakeApi.php

@@ -59,6 +59,11 @@ class AnotherFakeApi
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config

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

@@ -59,6 +59,11 @@ class FakeApi
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config

samples/client/petstore/php/SwaggerClient-php/lib/Api/FakeClassnameTags123Api.php

@@ -59,6 +59,11 @@ class FakeClassnameTags123Api
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config

samples/client/petstore/php/SwaggerClient-php/lib/Api/PetApi.php

@@ -59,6 +59,11 @@ class PetApi
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config

samples/client/petstore/php/SwaggerClient-php/lib/Api/StoreApi.php

@@ -59,6 +59,11 @@ class StoreApi
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config

samples/client/petstore/php/SwaggerClient-php/lib/Api/UserApi.php

@@ -59,6 +59,11 @@ class UserApi
      */
     protected $config;
 
+    /**
+     * @var HeaderSelector
+     */
+    protected $headerSelector;
+
     /**
      * @param ClientInterface $client
      * @param Configuration   $config