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<?php $host = parse_url('http://www.google.co.uk/test.html'); preg_match('/(.*?)((\.co)?.[a-z]{2,4})$/i', $host['host'], $m); $ext = isset($m[2]) ? $m[2]: ''; var_dump($ext);
Output for git.master, git.master_jit, rfc.property-hooks
string(6) ".co.uk"

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