Require one field from a set
add_filter(‘frm_validate_entry’, ‘check_phone_fields’, 10, 2); function check_phone_fields( $errors, $values ) { if ( $values[‘form_id’] == 45 ) { // change 45 to your form id $group_fields = array(25, 26, 27); // change 25, 26, 27 to the ids of your fields…Continue reading