<?php $sites = array( 'site.ru', 'www.site.ru', 'en.site.ru', 'www.en.site.ru', 'de.site.ru', 'www.de.site.ru', ); foreach($sites as $site) { preg_match_all('/^(?:www\.)?(en|de)?(.*)/i', $site, $matches); var_dump($matches); }
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