Adding Additional Fields to Symfony Form before Submit

Question

I'm using Goutte, https://github.com/fabpot/goutte, and have the following code,

$client = new Client();

$crawler = $client->request('GET', \Config::get('Eload2::url'));

$form = $crawler->selectButton('Submit')->form();

// add extra fields here

$client->submit($form);

how do I do to add hidden input fields to the form before it's submitted?

I tried the following code,

$domdocument = new \DOMDocument;

$formfield = new InputFormField ($domdocument->createElement('__EVENTTARGET', 'ctl00$ContentPlaceHolder1$DDLTelco'));

$formfield2 = new InputFormField ($domdocument->createElement('__EVENTARGUMENT',''));

$form->set($formfield); 

$form->set($formfield2);

but the following error message is returned,

An InputFormField can only be created from an input or button tag (__EVENTTARGET given).

Answer 1

What you are creating is this:

<__EVENTTARGET>ctl00$ContentPlaceHolder1$DDLTelco</__EVENTTARGET>
<__EVENTARGUMENT />

While you want:

<input name="__EVENTTARGET" value="ctl00$ContentPlaceHolder1$DDLTelco" />
<input name="__EVENTARGUMENT" value="" />

Try this:

$ff = $domdocument->createElement('input');
$ff->setAttribute('name', '__EVENTTARGET');
$ff->setAttribute('value', 'ctl00$ContentPlaceHolder1$DDLTelco');
$formfield = new InputFormField($ff);

$ff = $domdocument->createElement('input');
$ff->setAttribute('name', '__EVENTTARGET');
$ff->setAttribute('value', '');
$formfield2 = new InputFormField($ff);