php跳转到当前页面的方法

<?php
$url = $_GET['url'];
Header("Location:$url");
?>

if($_COOKIE["u_type"]){
header('location:register.php');
}
else{
setcookie('u_type','1','86400*360');//设置cookie长期有效
header('location:zc.html');
}

<?php
$url=czbin.php;
echo "";
?>

<?php
$url = czbin.php
Header("HTTP/1.1 303 See Other");
Header("Location: $url");
exit;
?>