จะเขียนโค้ดบันทึก checkbox แบบ array ซึ่งมี 2 array จะเขียนยังดีครับ

<input type="checkbox" name="device[]" id="device[]" value="1" />
<input type="checkbox" name="device[]" id="device[]" value="2" />
<input type="checkbox" name="device[]" id="device[]" value="3" />
<input type="checkbox" name="device[]" id="device[]" value="4" />
<input type="checkbox" name="device[]" id="device[]" value="5" />
<input type="checkbox" name="device[]" id="device[]" value="6" />

<?php
for($i = 0; $i <= 6; $i++)
     echo '<input type="checkbox" name="device[]" id="device[]" value="', $i', " />
?>

echo '<pre>'; print_r($_POST); echo '</pre>'; 

foreach($_POST[meet_type] as $type){
echo $type; // insert ลงตรงนี้
}
foreach($_POST[meet_food] as $food){
echo $food; // insert ลงตรงนี้
}

$sql = "INSERT INTO meet_re VALUES ('NULL','$_POST[id_meet_re]','$_POST[sub_re]','$_POST[num_re]','$date_dir','$_POST[time_in]','$_POST[time_out]','".$_SESSION['id_emp_a']."','$_POST[meet_type][$i]','$_POST[meet_food][$i]','0','".date("Y-m-d H:i:s")."')";