check if 2 urls are same domain

function sameDomain($url1, $url2) {
  $domain1 = parse_url($url1, PHP_URL_HOST);
  $domain2 = parse_url($url2, PHP_URL_HOST);
  
  return $domain1 === $domain2;
}
    
sameDomain('http://www.google.com/', 'http://www.google.com/mail')