<?php

include("baglan.php");

$id = $_GET['id']
$cek = mysql_fetch_array(mysql_query("select * from yazi where id='$id' "));

$yazi = $cek['yazi'];

?>

<form method="POST" action="duzenle.php">
<input type="text" name="yazi" value="<? echo $yazi; ?>">
</form>