upload files

kernel/FormModel.php

@@ -36,6 +36,11 @@ class FormModel
         return $this->data;
     }
 
+    public function setItem(string $name, string|int $value): void
+    {
+        $this->data[$name] = $value;
+    }
+
     public function getItem(string $name)
     {
         if (isset($this->data[$name])){