check if 2 urls are same domain

function isSameDomain($url1, $url2) {
  $url1_parts = parse_url($url1);
  $url2_parts = parse_url($url2);
  
  $url1_domain = $url1_parts['host'];
  $url2_domain = $url2_parts['host'];
  
  if ($url1_domain == $url2_domain) {
    return true;
  } else {
    return false;
  }
}