when i write it its giving this error
Warning: Cannot modify header information - headers already sent by (output started at c:\program files\apache group\apache\htdocs\portal\duzenle.php:35) in c:\program files\apache group\apache\htdocs\portal\duzenle.php on line 36
my php code is
<?
mysql_connect("localhost","root","");
mysql_select_db("portal");
$query="select post_subject,post_text from asd_uo_text where post_id = '1'";
$sonuc=mysql_query($query);
$obje=mysql_fetch_object($sonuc);
$subject=$obje->post_subject;
$content=$obje->post_text;
if(!isset($_GET["check"]))
{
?>
<form action="duzenle.php" method="get">
<b>Konu:</b><input type="text" name="Konu" size="20" value='<?php echo $subject; ?>'><br>
<b>Icerik:</b><textarea rows="25" cols="50" name="Icerik"><?php echo $content; ?></textarea><br>
<input type=hidden name=check value='Edit'><br>
<input type="submit" value=" Kaydet"></form>
<?
}
else
{
$check=$_GET["check"];
$query="update asd_uo_text set post_subject='".$_GET["Konu"]."' where post_id='1'";
$query2="update asd_uo_text set post_text='".$_GET["Icerik"]."' where post_id='1'";
@mysql_query($query);
@mysql_query($query2);
echo"Data has been inserted into database";
header("http://localhost/asdportal.php");
}
?>
Where did i make mistake?