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