FormValidatorBoolean.inc.php

<?php
 
import('lib.pkp.classes.form.validation.FormValidator');
 
class FormValidatorBoolean extends FormValidator {
   function __construct(&$form, $field, $message) {
      parent::__construct($form, $field, FORM_VALIDATOR_OPTIONAL_VALUE, $message);
   }
 
 
   //
   // Public methods
   //
   function isValid() {
      $value = $this->getFieldValue();
      $form =& $this->getForm();
      if (empty($value) || $value == 'on') {
         // Make sure that the form will contain a real
         // boolean value after validation.
         $value = ($value == 'on' ? true : false);
         $form->setData($this->getField(), $value);
         return true;
      } elseif($value === '1' || $value === '0') {
         $value = ($value === '1' ? true : false);
         $form->setData($this->getField(), $value);
         return true;
      } else {
         return false;
      }
   }
}