php页面自动跳转代码

<?php
header("HTTP/1.1 301 Moved Permanently");
header("Location: http://www.example.com/new-url");
exit();
?>

<?php
header("HTTP/1.1 302 Found");
header("Location: http://www.example.com/new-url");
exit();
?>

<?php
echo "<script>window.location.href='http://www.example.com/new-url';</script>";
?>

<?php
ob_start(); // 开启输出缓冲
header("HTTP/1.1 301 Moved Permanently");
header("Location: http://www.example.com/new-url");
exit();
ob_end_flush(); // 输出缓冲内容并关闭缓冲
?>

<?php
$current_url = $_SERVER['REQUEST_URI'];
if ($current_url == "/old-url") {
    header("HTTP/1.1 301 Moved Permanently");
    header("Location: http://www.example.com/new-url");
    exit();
}
?>