Online PHP editor | refs for LUOEc

<?php $mails = array( 'a.yamada@yamada.com', 'a.yamada@sub.yamada.com', 'a.yamada@sub.sub.yamada.com', 'a.yamada@sub.sub.sub.yamada.com', 'a.yamada@sub.sub.sub.yamada.com', 'a.yamada@yamada.net', 'a.yamada@sub.yamada.net', 'a.yamada@sub.sub.yamada.net', 'a.yamada@sub.sub.sub.yamada.net', 'a.yamada@sub.sub.sub.yamada.net', ); foreach ($mails as $mail) { if (preg_match('/@([^.]+\.){0,}yamada.com$/', $mail)) { echo "DISCARD\n"; } else { echo "OK\n"; } }