checkbox คือว่ามีcheck box ให้เลือกอยู่10 อัน check box แต่ละอันจะเก็บเป็นฟิลล์อยู่ในฐานข้อมูล

<?php
<form action="test2.php" method="post" > 


ประเภทกลุ่มข่าว
<select name="ra1" id="ra1">
 <option>โปรดเลือก</option>
 <?php 
  if($ra1=='หนังสือ') $selected="selected"; 
 else $selected="";
echo "<option value='book'$selected>หนังสือ</option>";

 if($ra1==' บริการ') $selected="selected"; 
 else $selected="";
echo "<option value='service'$selected>บริการ</option>";

  if($ra1=='เวลาเปิด') $selected="selected"; 
  else $selected="";
echo "<option value='open'$selected>เวลาเปิด</option>";

  if($ra1=='ข่าว') $selected="selected"; 
  else $selected="";
echo "<option value='news'$selectedข่าว</option>";
			
 if($ra1=='อื่นๆ') $selected="selected"; 
 else $selected="";
echo "<option value='other'$selected>อื่นๆ</option>";
	
?>
</select>
</br>
</br>
1.วิทยาศาสตร์
</br>

<INPUT TYPE="checkbox"    id="chk1" NAME="ra"  value="a">วิศวกรรม</br>
<INPUT TYPE="checkbox"   id="chk2"NAME="ra"  value="b">เคมี
</br>
<INPUT TYPE="checkbox"  id="chk3" NAME="ra"  value="c">คอม
</br>
<INPUT TYPE="checkbox"   id="chk4"NAME="ra"  value="d">ธรณีวิทยา
</br>
<INPUT TYPE="checkbox" id="chk5"NAME="ra"  value="e">วัสดุศาสตร์
</br>
<INPUT TYPE="checkbox" id="chk6"NAME="ra"  value="f">คณิตศาสตร์
</br>
<INPUT TYPE="checkbox" id="chk7"NAME="ra"  value="g">ฟิสิกส์
</br>

<INPUT TYPE="submit" NAME="submit" value="submit"style ="font-size:13pt;">

<INPUT TYPE="reset" NAME="cancel"value="Cancel" style ="font-size:13pt;">


</FORM>


?>

<?php
session_start();
session_register("ss_wayis");
include "connect.php"; 
	
$way = $_POST['ra'];   
$way1= $_POST['ra1'];   
if($way){
$_SESSION['ss_wayis'] = $way;  
}

if($way1){
$_SESSION['ss_wayis1'] = $way1; 
}

if($_SESSION['ss_wayis']!=""){
						
if($_SESSION['ss_wayis']=="a")
$wayis = "regis_4_1_1";	
if($_SESSION['ss_wayis']=="b")
$wayis = "regis_4_1_2";
if($_SESSION['ss_wayis']=="c")
$wayis = "regis_4_1_3";
if($_SESSION['ss_wayis']=="d")
 $wayis = "regis_4_1_4";
if($_SESSION['ss_wayis']=="e")
 $wayis = "regis_4_1_5";
if($_SESSION['ss_wayis']=="f")
 $wayis = "regis_4_1_6";
if($_SESSION['ss_wayis']=="g")
 $wayis = "regis_4_1_7";
	}
		

if($_SESSION['ss_wayis1']!=""){
if($_SESSION['ss_wayis1']=="book")
 $wayis1 = "regis_5_1";
if($_SESSION['ss_wayis1']=="service")
 $wayis1 = "regis_5_2";
if($_SESSION['ss_wayis1']=="open")
 $wayis1 = "regis_5_3";
if($_SESSION['ss_wayis1']=="news")
 $wayis1 = "regis_5_4";
if($_SESSION['ss_wayis1']=="other")
 $wayis1 = "regis_5_5";
}

 $strSQL = "select  *   from  regis where $wayis1 = '1' ||  $wayis = '1' ";
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]"); 

?>