Login yöntemi değiştirip scripte uyarlamak?

<input type="text" name="kullaniciadi" />
<input type="password" name="parola" />

<?php
	$username = $_POST[kullaniciadi];
	$password = $_POST[parola];
	
	$sorgu = mysql_query("SELECT * FROM tablo WHERE kullaniciadi='$username' AND parola='$password'");
	$sonuc = mysql_num_rows($sorgu);
	
	if($sonuc == 0){
		header("Location: login.php");
		}else{
		header("Location: index.php");
	}
?>

<?php
include"baglanti.php";

if($_POST['id'] == "" || $_POST['key'] == "") {
echo "Lütfen Tüm Alanları Doldurun";
}else{

$uyead = strip_tags(mysql_real_escape_string($_POST['id']));
$sifre = strip_tags(mysql_real_escape_string($_POST['key']));
$sifre = sha1($sifre);
$sql = mysql_query("select * from uyeler where  uye_ad='$uyead' and uye_sifre='$sifre'  ");
$uyevarmi = mysql_num_rows($sql);
if($uyevarmi == 0) {
echo "Incorrect username or password.";
} else {

$uyebilgi = mysql_fetch_array($sql);
$expire=time()+60*60*24*30;
setcookie("uyeid", "$uyebilgi[uye_id]", $expire);
setcookie("uyead", "$uyebilgi[uye_ad]", $expire);
setcookie("uyemail", "$uyebilgi[uye_mail]", $expire);

echo "<script>location.href='index.php';</script>"; // javascript yönlendirme kodu
} // if($uyevarmi == 0) kontrolü bitişi
}//textbox post verileri içerik kontrolü

?>

<?php
ob_start();
if(!ini_get('safe_mode')){
            set_time_limit(60);
} 
error_reporting(0); 
ignore_user_abort(TRUE);
define('vinaget', 'yes');
include("config.php");
date_default_timezone_set('Asia/Saigon');

if ($_GET['go']=='logout') {
		setcookie("secureid", "owner", time());
} 
else {
	$login = false;
	foreach ($SecureID as $login_vng)
	if($_POST['secure'] == $login_vng){
		if($mod10s) {
			$data = file_get_contents("http://france-10s.net/login/ip/".$_SERVER['REMOTE_ADDR']);
			if(stristr($data,"whitelist")==false) die("<h2><font color=purple>Detect fraud in the counter!</font></h2><br><b>If you are a mod now 10s.asia please use the nickmod and post the following: <font color=brown>hello ajinomoto!</font> in the Cbox then login again.");
		}
		#-----------------------------------------------
		$file = $fileinfo_dir."/log.txt";	//	Rename *.txt
		$date = date('H:i:s Y-m-d');
		$entry  = sprintf("Passlogin=%s\n", $_POST["secure"]);
		$entry .= sprintf("IP: ".$_SERVER['REMOTE_ADDR']." | Date: $date\n");
		$entry .= sprintf("------------------------------------------------------------------------\n");
		$handle = fopen($file, "a+")
		or die('<center><font color=red size=3>could not open file! Try to chmod the file "<b>log.txt</b>" to 666</font></center>');
		fwrite($handle, $entry)
		or die('<center><font color=red size=3>could not write file! Try to chmod the file "<b>log.txt</b>" to 666</font></center>');
		fclose($handle);
		#-----------------------------------------------
		setcookie("secureid",md5($login_vng),time()+3600*24*7);
		$login = true;
	}
	if($login == false) die("<SCRIPT language='Javascript'>alert(\"Wrong password!\");</SCRIPT><SCRIPT language='Javascript'>history.go(-1)</SCRIPT>");
}
header("location: index.php");
ob_end_flush();
?>

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<input type="text" name="kullaniciadi" />
<input type="password" name="parola" />

<?php
	$username = $_POST[kullaniciadi];
	$password = $_POST[parola];
	
	$sorgu = mysql_query("SELECT * FROM tablo WHERE kullaniciadi='$username' AND parola='$password'");
	$sonuc = mysql_num_rows($sorgu);
	
	if($sonuc == 0){
		header("Location: login.php");
		}else{
		header("Location: index.php");
	}
?>