<?php function get_host($url) { $host = parse_url($url, PHP_URL_HOST); $names = explode(".", $host); if(count($names) == 1) { return $names[0]; } $names = array_reverse($names); return $names[1] . '.' . $names[0]; } // Output for 5.6.0 echo get_host('http://www.site1.com/perma/doom-rock.htm'); // site1.com echo "\n"; echo get_host('http://www.site2.net/mod/doom.html'); // site2.net echo "\n"; echo get_host('https://www.site3.com/m/doom-rock'); // site3.com echo "\n"; echo get_host('http://site4.com/doom'); // site4.com echo "\n"; echo get_host('http://site5.com/doom'); // site5.com
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