From 0758daca71c92dce2530770a6d650cfbde6402fe Mon Sep 17 00:00:00 2001
From: Simon Asika <asika32764@gmail.com>
Date: Mon, 25 Dec 2023 13:43:36 +0800
Subject: [PATCH] ns string

---
 src/Form.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Form.php b/src/Form.php
index 8cd27cc..110686a 100644
--- a/src/Form.php
+++ b/src/Form.php
@@ -142,7 +142,7 @@ public function add(string $name, mixed $field, ?string $fieldset = null): Abstr
         $field->setName($name);
 
         $namespace = implode('/', $this->namespaceStack) . '/' . $namespace;
-        $namespace = trim($namespace, '/') ?: null;
+        $namespace = trim($namespace, '/') ?: '';
 
         return $this->addField($field, $fieldset, $namespace);
     }