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Answer 1

+2 A:

The domain is stored in $_SERVER['HTTP_HOST'].

EDIT: I believe this returns the whole domain. To just get the top-level domain, you could do this:

// Add all your wanted subdomains that act as top-level domains, here (e.g. 'co.cc' or 'co.uk')
// As array key, use the last part ('cc' and 'uk' in the above examples) and the first part as sub-array elements for that key
$allowed_subdomains = array(
    'cc'    => array(
        'co'
    ),
    'uk'    => array(
        'co'
    )
);

$domain = $_SERVER['HTTP_HOST'];
$parts = explode('.', $domain);
$top_level = array_pop($parts);

// Take care of allowed subdomains
if (isset($allowed_subdomains[$top_level]))
{
    if (in_array(end($parts), $allowed_subdomains[$top_level]))
        $top_level = array_pop($parts).'.'.$top_level;
}

$top_level = array_pop($parts).'.'.$top_level;

Franz 2010-02-24 16:57:43

This isn't quite what ilhan is after.

ar 2010-02-24 17:00:14

Why not? The edit fixed it.

Franz 2010-02-24 17:01:42

It still doesn't work even after the edit ;-). It does not deal with the google.co.uk case, as this would return 'co.uk'.

ar 2010-02-24 17:06:30

Well, how should a computer know whether a domain is meant to be a subdomain or not then without manually adding all examples like `co.uk`, `co.cc` and so on? I'll try to edit mine, though.

Franz 2010-02-24 17:10:39

Better now? I added an option to manually specify these exceptions.

Franz 2010-02-24 17:16:43

I guess you can use the list at http://publicsuffix.org/list and convert it to this format (I'd suggest using a script) ;)

Franz 2010-02-24 17:18:48

Answer 2

A:

henasraf 2010-02-24 17:00:36

I did the same mistake in the beginning. He only wants `google.com`, though.

Franz 2010-02-24 17:02:09

I see. Fair enough -- he can `preg_match()` to get the rest. Assuming `$url_split` is the parsed URL -- this can be done with... `preg_match('/www\.?([\w\-\.]+)([a-z\.]+)/i', $url_split['host'], $matches)` -- he can then use `$matches[1].$matches[2]` to fetch the host without the first domain. Problem with this though, is you can never predict how far the subdomain goes -- it could be `sub1.sub2.domain.co.uk` -- this would fetch `sub2.domain.co.uk`, not `domain.co.uk`

henasraf 2010-02-24 17:11:54

Answer 3

+1 A:

I reckon you'll need a list of all suffixes used after a domain name. http://publicsuffix.org/list/ provides an up-to-date (or so they claim) of all suffixes in use currently. The list is actually here Now the idea would be for you to parse up that list into a structure, with different levels split by the dot, starting by the end levels:

so for instance for the domains: com.la com.tr com.lc

you'd end up with:

[la]=>[com]
[lc]=>[com]

etc...

Then you'd get the host from base_url (by using parse_url), and you'd explode it by dots. and you start matching up the values against your structure, starting with the last one:

so for google.com.tr you'd start by matching tr, then com, then you won't find a match once you get to google, which is what you want...

Maurice Kherlakian 2010-02-24 17:16:00

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Parsing Domainname From URL In PHP

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