wangyating/test.php

<?php

/**
 * Created by PhpStorm.
 * User: chendeben
 * Date: 2019-01-11
 * Time: 17:41
 */



echo getRealUrl($_GET['url']);

function getRealUrl($url)
{
    //得到百度跳转的真正地址
    $header = get_headers($url, 1);
    if (strpos($header[0], '301') || strpos($header[0], '302')) {
        if (is_array($header['Location'])) {
            //return $header['Location'][count($header['Location'])-1];
            $_url = $header['Location'][0];
        } else {
            $_url = $header['Location'];
        }
    } else {
        $_url = $url;
    }
    $url = parse_url($_url);
    return $url['host'];
}