$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);     // 返回结果而不直接输出
curl_setopt($ch, CURLOPT_TIMEOUT, 10);           // 设置最大延迟为3秒
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 忽略https证书验证
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // 忽略https主机名验证
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false); // 设置不自动跳转
curl_setopt($ch, CURLOPT_HTTPHEADER, getHeaders4You());
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);  // 告诉cURL不要跟随重定向
curl_setopt($ch, CURLOPT_HEADER, true);           // 将响应头包含在输出中


//curl_setopt($ch, CURLOPT_COOKIEFILE, "cookies.txt"); // 设置 cookie 文件的读取路径
curl_setopt($ch, CURLOPT_COOKIEJAR, "cookies2.txt"); // 设置 cookie 文件的保存路径


$data = curl_exec($ch);

if (curl_errno($ch)) {
    $error_msg = curl_error($ch);
    echo "cURL Error: " . $error_msg . brStr();
    $data = ''; // 如果发生错误，则返回空字符
} else {
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);          // 获取 HTTP 响应码 302
    echo "HTTP Status Code: " . $httpCode . "\n";
}

echo "HTTP Status Code: " . $httpCode . "\n";
$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);         // 获取响应头部大小
$headers = substr($data, 0, $header_size);                       // 获取响应头部
$body = substr($data, $header_size);                                    // 获取响应正文（html）

// 分割头部和正文，以便单独处理
$headers_array = explode("\r\n", $headers);
// 循环遍历头部，找到 Set-Cookie 行
foreach ($headers_array as $header) {
    if (strpos($header, 'Set-Cookie:') === 0) {
        echo $header . "\n"; // 打印出 Set-Cookie 头部的值
    }
}
 
// 从响应头部中提取 Location 字段
if (preg_match('/Location:(.*?)\n/', $headers, $matches)) {
    $redirectUrl = trim($matches[1]);
    echo "Redirect URL is: $redirectUrl\n";
} else {
    echo "Location header not found.\n";
}



function getHeaders4You()
{
    $headers = [
        "accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
        "accept-language: zh-CN,zh;q=0.9",
        "cache-control: no-cache",
        "pragma: no-cache",
        "sec-ch-ua: \"Chromium\";v=\"124\", \"Google Chrome\";v=\"124\", \"Not-A.Brand\";v=\"99\"",
        "sec-ch-ua-mobile: ?0",
        "sec-ch-ua-platform: \"Windows\"",
        "sec-fetch-dest: document",
        "sec-fetch-mode: navigate",
        "sec-fetch-site: none",
        "sec-fetch-user: ?1",
        "upgrade-insecure-requests: 1",
        #"Referer:https://www.baidu.com/",
    ];
    return $headers;
}