Limit the combination of two fields
add_filter(‘frm_validate_field_entry’, ‘two_fields_unique’, 10, 2); function two_fields_unique( $errors, $posted_field ) { $first_field_id = 125; // change 125 to the id of the first field $second_field_id = 126; // change 126 to the id of the second field if ( $posted_field->id ==…Continue reading