if ('13') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/ass/13'; } ?> if ('13' == '1') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/ass/1'; } ?> if ('15' && '15' <= 10) { $next = 'http://'.$_SERVER['HTTP_HOST'].'/search/ass/15'; } ?>