php入门级用户登录代码

css教程.css" rel="stylesheet" type="text/css">


if ($http_cookie_vars["admin"]) {
 header("location:admin.php");
}
?>

$db=@mysql_connect("localhost","root","micronsky.net") or die("数据库连接也错");
mysql_select_db("vote",$db);
$submit=$_post["submit"];
$us=$_post["us"];
$pas=$_post["pas"];
if ($submit) {
 $result=mysql_query("select us,pas from admin where us='$us'",$db);
 if ($myrow=mysql_fetch_array($result)) {
  if ($pas==$myrow["pas"]) {
   setcookie("admin",$us,time()+3600);
   header("location:admin.php");
  }
  else {
   echo "";
  }
 }
  else {
   echo "";
  }

 }
?>