giris.php

<?php
session_start();
if ( !isset( $_SESSION["user_name"] ) ) {
   header( "location:login.php" );
}
ob_start ();
include ("baglan.php");

$user_name=$_POST["user_name"];
$password=$_POST["password"];

if (($user_name=="") and ($password=="")){
header ("location:login.php");
}else{

$sorgu=mysql_query ("SELECT * FROM  kullanicilar WHERE kullanici_adi='$user_name' and parola='$password'");

if (mysql_num_rows ($sorgu)>0) {
$oturum=$_SESSION["kullanici"]=$user_name;
echo "HOŞGELDİN $oturum";
}else{
echo "KULLANICI ADI VE PAROLA HATALI";
}
}
?>