ขอถามเกี่ยวกับ checkbox แบบ หลายชื่อหลายอันค่ะ คือว่า นู๋มี checkbox หลายช่อง

<?php 

foreach ($_POST as $k => $v) {
if ($v == 'y') {
require "../../../include/start_connection.php";
$travel_update=date("Y-m-d h:i:s");


$first2 = substr($k, 0, strpos($k, '_'));
$last2 = substr($k, strpos($k, '_') + 1);
if($first2=='menu'){
    $menu='y';
}else if($first2=='place'){
    $place='y';
}
else if($first2=='local'){
    $local='y';
}
else if($first2=='cafe'){
    $cafe='y';
}
else if($first2=='dinner'){
    $dinner='y';
}
else if($first2=='house'){
    $house='y';
}
else if($first2=='living'){
    $living='y';
}
else if($first2=='dressing'){
    $dressing='y';
}
else if($first2=='eating'){
    $eating='y';
}

echo $first2.'<br>'.$last2.'<br>';

$sql= 'UPDATE `travel` SET `travel_menu` = \''.$menu.'\', `travel_place` = \''.$place.'\', `travel_update` = \''.$travel_update.'\', `travel_localfood` = \''.$local.'\', `travel_cafe` = \''.$cafe.'\', `travel_dinner` = \''.$dinner.'\', `travel_house` = \''.$house.'\', `travel_living` = \''.$living.'\', `travel_dressing` = \''.$dressing.'\', `travel_eating` = \''.$eating.'\' WHERE `travel_id` = '.$last2.' ;';
$result = mysql_query($sql,$conn);

}
}

?>