<?php array (
'nested_file_upload_button' => 'Upload',
'nested[file][fid]' => '0',
'textfield' => '',
'form_build_id' => 'form-4QfAZlg-u1cp4uA_MhVRyKUOG81wsOZpFjoqs7GdxS0',
'form_token' => 'KyPWBJk2jJWyyHnpBGR7xKQoCGP39AyuKRCYwc4ghp8',
'form_id' => 'file_module_test_form',
)