Notice how the elements from the "Add new person" section are validated *only* when the "Add new" button is clicked
add('label', 'label_name', 'name', 'Name'); $obj = $form->add('text', 'name'); // set rules $obj->set_rule(array( 'required' => array('error', 'Name is required!'), )); // add the "surname" element $form->add('label', 'label_surname', 'surname', 'Surname'); $obj = $form->add('text', 'surname'); // set rules $obj->set_rule(array( 'required' => array('error', 'Surname is required!'), )); // elements for adding a new person // add the "name" element $form->add('label', 'label_add_name', 'add_name', 'Name'); $obj = $form->add('text', 'add_name'); // set rules // validate *only* if the "Add new" button is clicked $obj->set_rule(array( 'required' => array('error', 'Name is required!'), 'dependencies' => array( 'btnadd' => 'click', ), )); // add the "surname" element $form->add('label', 'label_add_surname', 'add_surname', 'Surame'); $obj = $form->add('text', 'add_surname'); // set rules $obj->set_rule(array( 'required' => array('error', 'Surname is required!'), 'dependencies' => array( 'btnadd' => 'click', ), )); // "add" $form->add('submit', 'btnadd', 'Add new'); // "submit" $form->add('submit', 'btnsubmit', 'Finish'); // if the form is valid if ($form->validate()) { // show results show_results(); // otherwise } else $form->render('includes/custom-templates/example2-dependencies.php'); ?>