breaking url down to domain/host

[Anon]

how do i break a url like
http://phpbuilder.com/forum/list.php3?num=2

down to
phpbuilder.com

iv been trying to use ereg replace, heres my coding..

<?php

$url = "http://www.sonce.net/index.php";
echo "Url: $url<BR>";

$new = eregi_replace("http://", "", $url);
echo "Host: $new<BR>";
$new2 = eregi_replace("/*", "", $new);
echo "Host: $new2<BR>";

?>

[sp0rk]

That exact problem and solution is in the manual. See the entry for preg_match.

[Anon]

thanks

[Anon]

what if its an ip address?
then that wont work...

[sp0rk]

Use the function gethostbyaddr(). It tries to lookup a hostname from a given IP address. It returns the IP adress it the lookup fails, so remember to check for that.