我想将价格四舍五入(向上或向下)到最接近的$xx.99
例如:
$17.99 -> Stay as is
$22.03 -> $21.99
$33.85 -> $33.99
$45 -> $44.99
加 0.01,四舍五入,减去 0.01
$input = 17.99; // example input
$add = $input + 0.01;
$round = round($add);
$output = $round - 0.01;
或多合一:
return round($input + 0.01) - 0.01;