/**
* Given a list of fields, validate some data.
*
* @param array $fields List of args that would be sent to FormBuilder::input()
* @param array $data (optional) The data to validate. Defaults to $_POST
* @param array $to_update (optional) Existing data to populate. Necessary for nested values
*
* @return array
*/
public static function validate_post_data($fields, $data = null, $to_update = array())
{
if (null === $data) {
$data = stripslashes_deep($_POST);
}
foreach ($fields as $field) {
$value = FormBuilder::get_value($field['name'], $data);
$fieldObj = FormField::create($field);
$value = $fieldObj->validate($value);
if (null !== $value) {
self::set_value($to_update, $field['name'], $value);
}
}
return $to_update;
}
