diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
index 559f3bd5a4bc..bd2cae073e51 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
@@ -211,6 +211,14 @@ protected function getOutputFormat(string $accept, array $produced): ?string
             return 'application/xml';
         }
 
+        if (in_array('application/pdf', $accept) && in_array('application/pdf', $produced)) {
+            return 'application/pdf';
+        }
+
+        if (in_array('image/png', $accept) && in_array('image/png', $produced)) {
+            return 'image/png';
+        }
+
         // If we reach this point, we don't have a common ground between server and client
         return null;
     }