ตอนนี้บันทึกข้อมูลได้แล้วค่ะแต่ต้องการให้เมื่อบันทึกแล้วเปิดเข้าไปดูใหม่ข้อมูลมาแสดงที่ radio อ่ะค่ะต้องทำงั้นไรค่ะช่วยชี้แนะด้วยค่ะ

<input type="radio" name="radio" id="radio" value="5" <?php if(ค่าจากฐานข้อมูล เท่ากับ 5) {echo "checked=\"checked\"";} ?>/>

<?
ob_start();
?>
<?
    session_start();
	$_SESSION['username']=$username;
	$_SESSION['stu_name']=$stu_name;
	$_SESSION['stu_surname']=$stu_surname;
	$_SESSION['no_major']=$no_major;
	$_SESSION['user_type']=$user_type;
	//echo $user_type;

?>
<?       
include "connect.php";       
$sql ="select evaluate.* ".       
"from student, evaluate ".       
"where student.studentId = evaluate.studentId ".      
"And evaluate.username = '$username'";       
$result=mysql_db_query($dbname,$sql)or die(mysql_error());    
$objResult = mysql_fetch_array($result);
$comment_1 = $objResult['comment_1'];
echo 'คะแนน ' . $comment_1;    
?>
<br/>
5 <input name="comment_1" type="radio" id = "radio" value="5" <? if($comment == '5') {echo "checked=\"checked\"";} ?>/>          
4 <input name="comment_1" type="radio" id = "radio" value="4" <? if($comment == '4') {echo "checked=\"checked\"";} ?>/> 
5 <input name="comment_1" type="radio" id = "radio" value="3" <? if($comment == '3') {echo "checked=\"checked\"";} ?>/>            
2 <input name="comment_1" type="radio" id = "radio" value="2" <? if($comment == '2') {echo "checked=\"checked\"";} ?>/>           
1 <input name="comment_1" type="radio" id = "radio" value="1" <? if($comment == '1') {echo "checked=\"checked\"";} ?>/>
<br />
5 <input name="comment_2" type="radio" id = "radio" value="5" <? if($comment == '5') {echo "checked=\"checked\"";} ?>/>          
4 <input name="comment_2" type="radio" id = "radio" value="4" <? if($comment == '4') {echo "checked=\"checked\"";} ?>/>           
3 <input name="comment_2" type="radio" id = "radio" value="3" <? if($comment == '3') {echo "checked=\"checked\"";} ?>/>           
2 <input name="comment_2" type="radio" id = "radio" value="2" <? if($comment == '2') {echo "checked=\"checked\"";} ?>/>           
1 <input name="comment_2" type="radio" id = "radio" value="1" <? if($comment == '1') {echo "checked=\"checked\"";} ?>/>  
<br />         
<input type="submit" name="comment" value="บันทึกข้อมูล" />