diff --git a/modules/openapi-generator/src/main/resources/php/api.mustache b/modules/openapi-generator/src/main/resources/php/api.mustache
index 6fac0d074880..1debf0856965 100644
--- a/modules/openapi-generator/src/main/resources/php/api.mustache
+++ b/modules/openapi-generator/src/main/resources/php/api.mustache
@@ -178,7 +178,7 @@ use {{invokerPackage}}\ObjectSerializer;
      */
     public function {{operationId}}WithHttpInfo({{^vendorExtensions.x-group-parameters}}{{#allParams}}${{paramName}}{{^required}} = {{#defaultValue}}{{{.}}}{{/defaultValue}}{{^defaultValue}}null{{/defaultValue}}{{/required}}{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}}{{#vendorExtensions.x-group-parameters}}$associative_array{{/vendorExtensions.x-group-parameters}})
     {
-        $request = $this->{{operationId}}Request({{^vendorExtensions.x-group-parameters}}{{#allParams}}${{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}}{{#vendorExtensions.x-group-parameters}}{{#allParams}}$associative_array['{{paramName}}']{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}});
+        $request = $this->{{operationId}}Request({{^vendorExtensions.x-group-parameters}}{{#allParams}}${{paramName}}{{#hasMore}}, {{/hasMore}}{{/allParams}}{{/vendorExtensions.x-group-parameters}}{{#vendorExtensions.x-group-parameters}}$associative_array{{/vendorExtensions.x-group-parameters}});
 
         try {
             $options = $this->createHttpClientOption();
diff --git a/samples/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php b/samples/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php
index ac0ec03603fb..8dc79ae14ff1 100644
--- a/samples/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php
+++ b/samples/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php
@@ -2807,7 +2807,7 @@ class FakeApi
      */
     public function testGroupParametersWithHttpInfo($associative_array)
     {
-        $request = $this->testGroupParametersRequest($associative_array['required_string_group'], $associative_array['required_boolean_group'], $associative_array['required_int64_group'], $associative_array['string_group'], $associative_array['boolean_group'], $associative_array['int64_group']);
+        $request = $this->testGroupParametersRequest($associative_array);
 
         try {
             $options = $this->createHttpClientOption();
diff --git a/samples/openapi3/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php b/samples/openapi3/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php
index bf56ce9e29d8..3e6bd3d25e29 100644
--- a/samples/openapi3/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php
+++ b/samples/openapi3/client/petstore/php/OpenAPIClient-php/lib/Api/FakeApi.php
@@ -2841,7 +2841,7 @@ class FakeApi
      */
     public function testGroupParametersWithHttpInfo($associative_array)
     {
-        $request = $this->testGroupParametersRequest($associative_array['required_string_group'], $associative_array['required_boolean_group'], $associative_array['required_int64_group'], $associative_array['string_group'], $associative_array['boolean_group'], $associative_array['int64_group']);
+        $request = $this->testGroupParametersRequest($associative_array);
 
         try {
             $options = $this->createHttpClientOption();