php parse_ URL bypass whitelist

    $host = parse_url($url, PHP_URL_HOST); 
    if (!in_array($host, [
        'xxx.xxx',
       
    ]))

This test is known , Judge url Of host Is it on the white list , At this time, you can use the http://[email protected] This way bypasses ,http://[email protected] analysis host by xxx.xxx, When the browser visits this website ,\ The symbol will become / Symbol , Cause to bypass .