if ('12') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/tag/12'; } ?> if ('12' == '1') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/tag/1'; } ?> if ('14' && '14' <= 10) { $next = 'http://'.$_SERVER['HTTP_HOST'].'/search/tag/14'; } ?>