use URI;
$u1 = URI->new('http://www.comp.leeds.ac.uk/Perl/');
$u2 = URI->new('http://www.comp.leeds.ac.uk/Perl/filehandling.html');
print "u1.host=",$u1->host(),"\n";
print "u2.host=",$u2->host(),"\n";
if ($u1->host() eq $u2->host()) {
   print "URL's host are the same\n";
}
else {
   print "oops\n";
}

##</code><code>##

u1.host=www.comp.leeds.ac.uk
u2.host=www.comp.leeds.ac.uk
URL's host are the same

##</code><code>##

PARSING URIs WITH REGEXP
As an alternative to this module, the following (official) regular expression can be used to decode a URI:

  my($scheme, $authority, $path, $query, $fragment) =
  $uri =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|;
The URI::Split module provide the function uri_split() as a readable alternative.

##</code><code>##

use URI;
$u1 = URI->new('http://www.comp.Leeds.ac.uk/Perl/')->canonical();
$u2 = URI->new('http://www.comp.leeds.ac.uk/Perl/filehandling.html')->canonical();
print "u1.host=",$u1->host(),"\n";
print "u2.host=",$u2->host(),"\n";
if ($u1->host() eq $u2->host()) {
   print "URL's host are the same\n";
}
else {
   print "oops\n";
}