Basic Form robot protection sf1

MyForm.php

<?php

class MyForm extends sfForm
{
  protected $robotProtectionFieldName = "_honeypot_robot";
  
  public function __construct($defaults = array(), $options = array(), $CSRFSecret = null)
  {
    parent::__construct($defaults, $options, $CSRFSecret);
    
    $this->validatorSchema[$this->robotProtectionFieldName] = new sfValidatorRegex(array('required' => false, 'pattern' => '/^$/'));
    $this->widgetSchema[$this->robotProtectionFieldName] = new sfWidgetFormInputText(array('is_hidden' => true), array('style' => 'display: none;'));
  }
}