不使用round()函数在php中执行round()
$a = "123.45785";
$v = round($a);
output: 123.46;
它是通过round函数完成的,但我想在不使用round和number_format()函数的情况下获得输出。
答案 0 :(得分:1)
以下是使用算术的方法:
function my_round($num, $places = 2) {
// Multiply to "move" decimals to the integer part
// (Save one extra digit for rounding)
$num *= pow(10, $places + 1);
// Truncate to remove decimal part
$num = (int) $num;
// Do rounding based on the last digit
$lastDigit = $num % 10;
if ($lastDigit >= 5)
$num += 10;
// Remove last digit
$num = (int) ($num/10);
// "Move" decimals in place, and you're done
$num /= pow(10, $places);
return $num;
}
答案 1 :(得分:0)
您有sprintf
。
$a = "123.45785";
echo sprintf("%01.2f", $a); // output: 123.46