php 获取这个地址跳转了几次

<?php
function getRedirectCount($url) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_MAXREDIRS, 10); // 设置最大重定向次数
    curl_setopt($ch, CURLOPT_NOBODY, true); // 不需要获取页面内容，只需要头信息

    curl_exec($ch);
    $redirectCount = curl_getinfo($ch, CURLINFO_REDIRECT_COUNT);
    curl_close($ch);

    return $redirectCount;
}

$url = 'http://example.com'; // 替换为你要检查的网址
$redirectCount = getRedirectCount($url);
echo "跳转次数: " . $redirectCount;
?>