PHP输入百分比数字四舍五入到小数点后两位 [英] PHP enter percentage number round to 2 decimal places not working

问题描述

php的数字四舍五入到小数点后两位.我的数字是0.00000000000000000000001，我希望结果为0.01.我尝试了php number_format()函数php

php number round to 2 decimal places not working my number is 0.00000000000000000000001 and I want result as 0.01. I tried php number_format() function php round() function but they didn't work for me.

推荐答案

只需创建一个简单的函数即可返回舍入值或所需的最小值...

Just make a simple function that returns either the rounded value or the minimum value you would like...

function round_special($x)
{
    if ($x == 0) return 0;

    $rounded = round($x, 2);
    $minValue = 0.01;

    if ($rounded < $minValue) {
        return number_format($minValue, 2);
    } else {
        return number_format($rounded, 2);
    }
}

因此，结果将如下所示:

So, results would look like:

$x = 0.00000000000000000000001;
echo round_special($x);     // 0.01

echo round_special(0.0001); // 0.01
echo round_special(55);     // 55.00
echo round_special(0.6);    // 0.06

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