สอบถามวิธีจำค่า checkbox ที่เราเลือก โดยใช้ SESSION คับ

<?PHP
session_start();

if ($_POST) {
if ($_POST['B1']) { $_SESSION['box1']=1; }else { $_SESSION['box1']=2; }
if ($_POST['B2']) { $_SESSION['box2']=1; }else { $_SESSION['box2']=2; }
if ($_POST['B3']) { $_SESSION['box3']=1; }else { $_SESSION['box3']=2; }
}
?>
<form method="post" action="">
<input type="checkbox" name="B1" id="B1"  <?PHP if($_SESSION['box1']==1) { echo "checked='checked'"; } ?> />BOX1<br>
<input type="checkbox" name="B2" id="B2" <?PHP if($_SESSION['box2']==1) { echo "checked='checked'"; } ?> />BOX2<br>
<input type="checkbox" name="B3" id="B3" <?PHP if($_SESSION['box3']==1) { echo "checked='checked'"; } ?> />BOX3<br>
<input type="submit" name="button" id="button" value="OK" />

<?php
session_start();

	
$id[]=$_POST["id[]"];
$_SESSION["id[]"] =$id;
?>

 <tr >
<td title="Insert" ><a href="stock3.php?id=<?=$data['id'];?>"><center><img src="images/home/add.png" /></center></a></td>
<td align="center" ><? echo ++$n ?></td>
<td width="200" ><?=$data['product_id'];?></td>
<td class="fix"><?=$data['product_des'];?></td>
<td width="180" align="center"><?=$data['start_date'];?></td>
<td width="180" align="center"><?=$data['end_date'];?></td>
<td width="800" class="fix" ><?=$data['detail'];?> </td>

<td class="fix"><?=$data['serial'];?></td>
<td class="fix" ><a href="showSearch_test.php?customer=<?=$data['customer'];?>&product_id=<?=$data['customer'];?>"><?=$data['customer'];?></a></td>
<td width="25" align="center"><?=$data['trans_code'];?> </td>
<td width="25" align="center"><?=$data['quantity'];?></td>
<td ><a href="../myproject/storeimage/<?=$data['image'];?>"><center><img src='<?=$data['image'];?>' /></center></a></td>
<td class="fix"><?=$data['user'];?></td>
<td title="Edit" ><a href="stock.php?id=<?=$data['id'];?>"><img src="images/home/edit2.png" /></a></td>
<td align="center" title="Delete" ><a href="stock_delete.php?id=<?=$data['id'];?>" onclick="return confirm('ยืนยันการลบ')"><img src="images/home/dele.gif" /></a></td>
<td align="center" title="Export"> <a href="select.php?id=<?=$data['id'];?>">
 <input type="checkbox" name="id[]" id="id[]" <?PHP if($_SESSION['id[]']=$id) ?> /></a></td>
</tr>