if ('1') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/xxx/1'; } ?> if ('1' == '1') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/xxx/1'; } ?> if ('3' && '3' <= 10) { $next = 'http://'.$_SERVER['HTTP_HOST'].'/search/xxx/3'; } ?>