silverstripe-framework/forms/HiddenField.php

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<?php
/**
* Hidden field.
* @package forms
* @subpackage fields-dataless
*/
class HiddenField extends FormField {
protected $template = 'HiddenField';
function FieldHolder() {
return $this->Field();
}
function performReadonlyTransformation() {
$clone = clone $this;
$clone->setReadonly(true);
return $clone;
}
function IsHidden() {
return true;
}
function getAttributes() {
return array_merge(
parent::getAttributes(),
array('type' => 'hidden')
);
}
}