check_user

function checkuser($user,$pw) {
   $link = new mysqli(DB_SERVER, DB_USER, DB_PASSWORD, DB_NAME) or die('Veri tabanı bağlantısı sağlanamadı!');
   $pw = md5($pw);
   $sorgu ="SELECT * FROM users WHERE user_name= ? AND user_pass= ? LIMIT 1";
   if($smt = $link->prepare($sorgu)){
      $smt->bind_param('ss' ,$user, $pw);
      $smt->execute();
      $smt->bind_result($user_name);
      if ($smt->fetch()){
         $_SESSION['user'] = $user_name;
         $_SESSION['logged'] = true;
         return true;
      } else {
      $_SESSION['error'] ="Hata!";
      return false;
      }
      $smt->close();
   }
   $link->close();
}