Created
April 11, 2013 20:27
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PHP code to get the domain name without subdomains (includes the tld, and the special types from IANA). Don't have support for unicode domain names.
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| <?php | |
| /** | |
| * @param string $domain Pass $_SERVER['SERVER_NAME'] here | |
| * @param bool $debug | |
| * | |
| * @debug bool $debug | |
| * @return string | |
| */ | |
| function get_domain($domain, $debug = false) | |
| { | |
| $original = $domain = strtolower($domain); | |
| if (filter_var($domain, FILTER_VALIDATE_IP)) { return $domain; } | |
| $debug ? print('<strong style="color:green">»</strong> Parsing: '.$original) : false; | |
| $arr = array_slice(array_filter(explode('.', $domain, 4), function($value){ | |
| return $value !== 'www'; | |
| }), 0); //rebuild array indexes | |
| if (count($arr) > 2) | |
| { | |
| $count = count($arr); | |
| $_sub = explode('.', $count === 4 ? $arr[3] : $arr[2]); | |
| $debug ? print(" (parts count: {$count})") : false; | |
| if (count($_sub) === 2) // two level TLD | |
| { | |
| $removed = array_shift($arr); | |
| if ($count === 4) // got a subdomain acting as a domain | |
| { | |
| $removed = array_shift($arr); | |
| } | |
| $debug ? print("<br>\n" . '[*] Two level TLD: <strong>' . join('.', $_sub) . '</strong> ') : false; | |
| } | |
| elseif (count($_sub) === 1) // one level TLD | |
| { | |
| $removed = array_shift($arr); //remove the subdomain | |
| if (strlen($_sub[0]) === 2 && $count === 3) // TLD domain must be 2 letters | |
| { | |
| array_unshift($arr, $removed); | |
| } | |
| else | |
| { | |
| // non country TLD according to IANA | |
| $tlds = array( | |
| 'aero', | |
| 'arpa', | |
| 'asia', | |
| 'biz', | |
| 'cat', | |
| 'com', | |
| 'coop', | |
| 'edu', | |
| 'gov', | |
| 'info', | |
| 'jobs', | |
| 'mil', | |
| 'mobi', | |
| 'museum', | |
| 'name', | |
| 'net', | |
| 'org', | |
| 'post', | |
| 'pro', | |
| 'tel', | |
| 'travel', | |
| 'xxx', | |
| ); | |
| if (count($arr) > 2 && in_array($_sub[0], $tlds) !== false) //special TLD don't have a country | |
| { | |
| array_shift($arr); | |
| } | |
| } | |
| $debug ? print("<br>\n" .'[*] One level TLD: <strong>'.join('.', $_sub).'</strong> ') : false; | |
| } | |
| else // more than 3 levels, something is wrong | |
| { | |
| for ($i = count($_sub); $i > 1; $i--) | |
| { | |
| $removed = array_shift($arr); | |
| } | |
| $debug ? print("<br>\n" . '[*] Three level TLD: <strong>' . join('.', $_sub) . '</strong> ') : false; | |
| } | |
| } | |
| elseif (count($arr) === 2) | |
| { | |
| $arr0 = array_shift($arr); | |
| if (strpos(join('.', $arr), '.') === false | |
| && in_array($arr[0], array('localhost','test','invalid')) === false) // not a reserved domain | |
| { | |
| $debug ? print("<br>\n" .'Seems invalid domain: <strong>'.join('.', $arr).'</strong> re-adding: <strong>'.$arr0.'</strong> ') : false; | |
| // seems invalid domain, restore it | |
| array_unshift($arr, $arr0); | |
| } | |
| } | |
| $debug ? print("<br>\n".'<strong style="color:gray">«</strong> Done parsing: <span style="color:red">' . $original . '</span> as <span style="color:blue">'. join('.', $arr) ."</span><br>\n") : false; | |
| return join('.', $arr); | |
| } | |
| $urls = array( | |
| 'www.example.com' => 'example.com', | |
| 'example.com' => 'example.com', | |
| 'example.com.br' => 'example.com.br', | |
| 'www.example.com.br' => 'example.com.br', | |
| 'www.example.gov.br' => 'example.gov.br', | |
| 'localhost' => 'localhost', | |
| 'www.localhost' => 'localhost', | |
| 'subdomain.localhost' => 'localhost', | |
| 'www.subdomain.example.com' => 'example.com', | |
| 'subdomain.example.com' => 'example.com', | |
| 'subdomain.example.com.br' => 'example.com.br', | |
| 'www.subdomain.example.com.br' => 'example.com.br', | |
| 'www.subdomain.example.biz.br' => 'example.biz.br', | |
| 'subdomain.example.biz.br' => 'example.biz.br', | |
| 'subdomain.example.net' => 'example.net', | |
| 'www.subdomain.example.net' => 'example.net', | |
| 'www.subdomain.example.co.kr' => 'example.co.kr', | |
| 'subdomain.example.co.kr' => 'example.co.kr', | |
| 'example.co.kr' => 'example.co.kr', | |
| 'example.jobs' => 'example.jobs', | |
| 'www.example.jobs' => 'example.jobs', | |
| 'subdomain.example.jobs' => 'example.jobs', | |
| 'insane.subdomain.example.jobs' => 'example.jobs', | |
| 'insane.subdomain.example.com.br' => 'example.com.br', | |
| 'www.doubleinsane.subdomain.example.com.br' => 'example.com.br', | |
| 'www.subdomain.example.jobs' => 'example.jobs', | |
| 'test' => 'test', | |
| 'www.test' => 'test', | |
| 'subdomain.test' => 'test', | |
| 'www.detran.sp.gov.br' => 'sp.gov.br', | |
| 'www.mp.sp.gov.br' => 'sp.gov.br', | |
| 'ny.library.museum' => 'library.museum', | |
| 'www.ny.library.museum' => 'library.museum', | |
| 'ny.ny.library.museum' => 'library.museum', | |
| 'www.library.museum' => 'library.museum', | |
| 'info.abril.com.br' => 'abril.com.br', | |
| '127.0.0.1' => '127.0.0.1', | |
| '::1' => '::1', | |
| ); | |
| $failed = 0; | |
| $total = count($urls); | |
| foreach ($urls as $from => $expected) | |
| { | |
| $from = get_domain($from, true); | |
| if ($from !== $expected) | |
| { | |
| $failed++; | |
| print("<div style='color:fuchsia;'>expected {$from} to be {$expected}</div>"); | |
| } | |
| } | |
| if ($failed) | |
| { | |
| print("{$failed} tests failed out of {$total}"); | |
| } | |
| else | |
| { | |
| print("Success"); | |
| } |
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If you want all TLD list, you can find it updated in https://data.iana.org/TLD/tlds-alpha-by-domain.txt
But if you want the list for PHP language you can copy here: