Merhaba Arkadaşlar,
Bir üye giriş sayfam var. Cookie ile yaptırıyorum işlemi ancak giriş yapınca şöyle bir hata alıyorum...

Warning: Cannot modify header information - headers already sent by (output started at /home/site/public_html/db.php:1) in /home/site/public_html/giris.php on line 20

Warning: Cannot modify header information - headers already sent by (output started at /home/site/public_html/db.php:1) in /home/site/public_html/giris.php on line 21

bunlarda giris.php

<?php 
include("db.php");
$gelenadres	= $_SERVER['HTTP_REFERER'];

$email	= $_POST["email"];
$sifre	= $_POST["sifre"];
$sifre1	= md5($sifre);

$sor	=	mysql_query("Select * From uyeler Where eposta='".mysql_real_escape_string($email)."' and sifre='".mysql_real_escape_string($sifre1)."'");
if(mysql_num_rows($sor)>0){
	$yaz = mysql_fetch_array($sor);
	$id 	= $yaz["id"];
	$email	= $yaz["eposta"];
	$onay	= $yaz["onay"];
	
	if($onay == 0){
	echo "<meta http-equiv=\"refresh\" content=\"2;url=$gelenadres?durum=2\" />";
	}else{
	if($_POST["hatirla"] == 1){
		setcookie("id" , $id , time()+60*60*60*60*60);
		setcookie("email" , $email , time()+60*60*60*60*60);
	}else{
		setcookie("id" , $id , time()+60*60*60);
		setcookie("email" , $email , time()+60*60*60);
		}
		
	echo "<meta http-equiv=\"refresh\" content=\"2;url=index.php\" />";
	}
}else{
	echo "<meta http-equiv=\"refresh\" content=\"2;url=$gelenadres?durum=1\" />";
}

?>

Bunu nasıl çözebilirim...