[RESOLVED] Extract domain name

[greenba]

hi,

I have the following in a text area:

subdomain.domain.com
domain.com/folder1
domain.com/folder1/folder2
subdomain.domain.com/folder1

What I need it to filter and extract only the main domain name, which in this case is "domain.com".

Any ideas?

[laserlight]

Consider using [man]parse_url/man

[greenba]

thanx,

but here is the problem, when I use this code

<?php
$url = 'http://subdomain.domain.com/folder/';

print_r(parse_url($url));
?>

I got:
Array (
[scheme] => http
[host] => subdomain.domain.com
[path] => /folder/
)

But how to get rid od the subdomain ?
Becaus all I need is the main domain.

[laserlight]

This isnt perfect (you may want to refer to the relevant RFCs), but you can try something along the lines of:

$pattern = '/([a-z0-9\-]{1,63}.[a-z]{3}(.[a-z]{2})?)$/i';
$domain = 'example.com';
if (preg_match($pattern, $domain, $matches)) {
	echo $matches[1];
}

[greenba]

thank you