<?php function ceiling($number, $significance = 1000) { $ratusan = $number % 1000; $pembulatan_ratusan = ceil($ratusan / $significance) * $significance; $ribuan = $number - $ratusan; return $ratusan <= 500 ? $ribuan : $ribuan + $pembulatan_ratusan; // return ( is_numeric($number) && is_numeric($significance) ) ? (ceil($number/$significance)*$significance) : false; } echo ceiling(12500, 1000);