โค้ดredirect ไปหน้าแรก คือว่า กดsubmit แล้ว ถ้าถูกโค้ด redirect ไปหน้าแรกตลอดเวลาเลย

<?php
session_start() ;
isset($email);
isset($pass);

$email=$_REQUEST[email];
$pass=$_REQUEST[pass];

	//if(isset($email) and isset($pass)) {
$host="localhost";
$user="root";//itgbkk_shop
$pw="root";
$dbname="itgbkk_athletiflix";
$c = mysql_connect($host,$user,$pw);

mysql_select_db($dbname);
if (!$c) {
	echo "<H3>ไม่สามารถติดต่อฐานข้อมูลได้</H3>";
	exit();
}
?>
<?php 
$result = mysql_query("select * from tb_member1 where email='$email' and pass='$pass'") ;
$num = mysql_num_rows($result) ;
if($num<=0) {
echo "<br><br><center><font size='3' face='MS Sans Serif'><b><font color='red'>ERROR email or password !!</b></font></center>" ;
print "<meta http-equiv=refresh content=2;URL=details_member.php>";
exit() ;
}
else {

$dbarr = mysql_fetch_array($result) ;
if($email!=$dbarr['email'] and $pass!=$dbarr['pass']) {
echo "ERROR email or password !!" ;
exit() ;
}

else {
$login_true = $email ;
session_register("login_true") ;
echo "<meta http-equiv='refresh' content='0 ;url=details_member.php'>" ;
exit() ;
}
}

?>