ya ben senin için basit yaptım birtane Yanlız Cıkış Yapmak için Cıkış butonuna iki kere tıklaman lazım

ayar.php
<?php
/*enc0der  the_of_maho@hotmail.com enc0der@datapaylasim.com
*/
$baglan = @mysql_connect("localhost", "root", "");
if(! $baglan) die ("mysql hata");
@mysql_select_db("video") or die ("db hata");

mysql_query("SET NAMES 'latin5'");
 ?>
index.php

<?php 
session_start(); ob_start();
/*datapaylasim.com  coder enc0der  the_of_maho@hotmail.com enc0der@datapaylasim.com
*/
include("ayar.php");
$uye = $_SESSION['mail'];
$enc0der = $_GET['enc0der'];

function index(){
global $uye;
if($uye==""){
echo "<center>Oturum Cınızı</center> ";
}else{
echo $uye."hoş Geldin";
}
echo '<div align="center"><a href="index.php">Anasayfa| </a><a href="index.php?enc0der=uyeol"> UYE OL</a> |<a href="index.php?enc0der=admin">Admin Paneli</a>| <a href="index.php?enc0der=Cikis">CIKIŞ</a> </div>
';

}
function uyeol(){

echo "<form action=\"index.php?enc0der=uyekayit\" method=\"POST\">


<div align=\"center\">


<table border=\"0\" width=\"30%\" cellspacing=\"0\" cellpadding=\"0\" bordercolor=\"#800000\">
	<tr>
		<td colspan=\"3\" bgcolor=\"#800000\">
		<p align=\"center\"><b><font color=\"#FFFFFF\">Uye Kayıt Formu</font></b></td>
	</tr>
	<tr>
		<td width=\"33%\">E-Mail Adresiniz</td>
		<td width=\"1%\">:</td>
		<td width=\"65%\"><input type=\"text\" name=\"mail\" size=\"20\"></td>
	</tr>
	<tr>
		<td width=\"33%\">Şifre</td>
		<td width=\"1%\">:</td>
		<td width=\"65%\"><input type=\"password\" name=\"sifre\" size=\"20\"></td>
	</tr>
	<tr>
		<td width=\"33%\">Şifre Tekrar</td>
		<td width=\"1%\">:</td>
		<td width=\"65%\"><input type=\"password\" name=\"sifreiki\" size=\"20\"></td>
	</tr>
	<tr>
		<td width=\"33%\">&nbsp;</td>
		<td width=\"1%\">&nbsp;</td>
		<td width=\"65%\"><input type=\"submit\" value=\"Üye Ol\">&nbsp;&nbsp;
		<a href=\"http://www.datapaylasim.com/\">Datapaylasim.com</a></td>
	</tr>
</table>

</div>

</form>";
}
function uyekayit(){
include("ayar.php");
$mail   = $_POST['mail'];
$sifre  = $_POST['sifre'];
$sifreiki = $_POST['sifreiki'];

$ekle = mysql_query("INSERT INTO uye (mail, sifre, sifreiki) values('$mail', '$sifre', '$sifreiki')");
if($ekle){
echo "<center> Uye Kaydı Başarılı ";

}else{
echo "<center> Bir Hata Meydana Geldi :)</center>";
}
}
function admin(){
global $uye;
if($uye=""){
header("location: login.php");
}else{
header("location: uye.php");
}
}




function Cikis(){
global $uye;

session_destroy();
unset($uye);

}
switch($enc0der){
default:
index();
break;

  	case "uyeol":
		index();
		uyeol();
		break;
	
	case "uyekayit":
	index();
	uyekayit();
	break;
	
	case "admin":
	index();
	admin();
	break;
	
	
	case "Cikis":
	index();
	Cikis();
	break;
}
?>
login.php

<?php 
session_start(); ob_start();
/*datapaylasim.com  coder enc0der  the_of_maho@hotmail.com enc0der@datapaylasim.com
*/
include("ayar.php");
$mail = $_POST['mail'];
$sifre = $_POST['sifre'];

if(($mail=="") or ($sifre=="")){

echo "<center>Boş ALAN Bırakma</center>";
}else{

$gir = mysql_query("SELECT * FROM uye WHERE mail='$mail' and sifre='$sifre'");
if(mysql_num_rows($gir) > 0){
$_SESSION['mail'] = $mail;
header("location: uye.php");
}else{
echo "Kullanııcı Adı yada şifreniz yanlış";
}

}


?>
<?php 
/*datapaylasim.com  coder enc0der  the_of_maho@hotmail.com enc0der@datapaylasim.com
*/
echo "<center>

<form action=\"login.php\" method=\"POST\">


<div align=\"center\">


<table border=\"0\" width=\"50%\" cellspacing=\"0\" cellpadding=\"0\" bordercolor=\"#800000\">
	<tr>
		<td colspan=\"3\" bgcolor=\"#800000\">
		<p align=\"center\"><b><font color=\"#FFFFFF\">Uye giris Formu</font></b></td>
	</tr>
	<tr>
		<td width=\"33%\">E-Mail Adresiniz</td>
		<td width=\"1%\">:</td>
		<td width=\"65%\"><input type=\"text\" name=\"mail\" size=\"20\"></td>
	</tr>
	<tr>
		<td width=\"33%\">Şifre</td>
		<td width=\"1%\">:</td>
		<td width=\"65%\"><input type=\"text\" name=\"sifre\" size=\"20\"></td>
	</tr>

	<tr>
		<td width=\"33%\">&nbsp;</td>
		<td width=\"1%\">&nbsp;</td>
		<td width=\"65%\"><input type=\"submit\" value=\"Giriş\">&nbsp;&nbsp;
		<a href=\"http://www.datapaylasim.com/\">Datapaylasim.com</a></td>
	</tr>
</table>

</div>

</form></center>";

?>
uye.php
<?php 
session_start(); ob_start();
/*datapaylasim.com  coder enc0der  the_of_maho@hotmail.com enc0der@datapaylasim.com
*/
$uye = $_SESSION['mail'];

include("ayar.php");
if($uye==""){
echo "<center>giriş yap Yönlendiriliyorsunus</center>";
header("refresh: 2; url=login1.php");
}else{
echo "<p>Hoş geldiniz $uye </p>
<table border=\"1\" width=\"100%\" id=\"table1\" cellspacing=\"0\" cellpadding=\"0\" bordercolor=\"#800000\">
	<tr>
		<td bgcolor=\"#800000\" height=\"25\">
		<p align=\"center\"><b><font color=\"#FFFFFF\">Mail Listesi</font></b></td>
	</tr>";
	$cek = mysql_query("select * from uye");
	while($yaz=mysql_fetch_array($cek)){
	
	$mail = $yaz['mail'];
	echo "<tr>
		<td>$mail</td>
	</tr>
";
	}
echo "</table>
";
}

?>
sql dosyamız

-- phpMyAdmin SQL Dump
-- version 2.11.4
-- http://www.phpmyadmin.net
--
-- Anamakine: localhost
-- Üretim Zamanı: 08 Eylül 2008 saat 17:26:04
-- Sunucu sürümü: 5.0.51
-- PHP Sürümü: 5.2.5

SET SQL_MODE="NO_AUTO_VALUE_ON_ZERO";

--
-- Veritabanı: `video`
--

-- --------------------------------------------------------

--
-- Tablo yapısı: `uye`
--

CREATE TABLE IF NOT EXISTS `uye` (
  `id` int(11) NOT NULL auto_increment,
  `mail` varchar(225) NOT NULL,
  `sifre` varchar(225) NOT NULL,
  `sifreiki` varchar(225) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=latin5 AUTO_INCREMENT=3 ;

--
-- Tablo döküm verisi `uye`
--

INSERT INTO `uye` (`id`, `mail`, `sifre`, `sifreiki`) VALUES
(1, 'the_of_maho@hotmail.com', '123456', '123456'),
(2, 'enc0der@datapaylasim.com', '123', '123');
login1.php