Url is end of life. We strongly encourage you to use League\Uri instead.
The Host class
This class is a segment values component class and manage the URL host component. It implementings the League\Url\Components\HostInterface too.
The interface provides methods to deal with IDN.
HostInterface::toUnicode()
added in version 3.1
This method is an alias of __toString() and return the hostname internationalized name
HostInterface::toAscii()
added in version 3.1
Returns the Punycode encoded hostname;
<?php
use League\Url\Components\Host;
$host = new Host;
$host->set('스타벅스코리아.com'); //you set the IDN
var_export($host->toArray());
//will display
// array(
// 0 => '스타벅스코리아',
// 1 => 'com'
// )
echo $host->toAscii(); // output 'xn--oy2b35ckwhba574atvuzkc.com'
echo $host->toUnicode(); // output '스타벅스코리아.com'
$host->set('xn--mgbh0fb.xn--kgbechtv'); //you set a ascii hostname
echo $host; // output 'مثال.إختبار' //the object output the IDN version