我想在 php 中显示一个数字，它在小数点后有 30 位数字，而不将其四舍五入为纳米货币，有人有什么想法吗？

Question

例如，如果我有一个号码

$x = 340282366920938430000000000000000000000;

我想要输出为 340282366.92093 而不是 340282366.92094 还有像

这样的数字

$y = 23000000000;

我希望输出是 0.000000000000000000023

Answer 1

使用字符串转换 bcdiv

$number = '340282366920938430000000000000000000000';
echo bcdiv($number, '1000000000000000000000000000000', 8);

Return

340282366.92093843

Answer 2

您需要做的是将 raws 转换为 megaNano。我开发了这个解决方案，它只是将值视为一个字符串，但它是在 JS 中。我希望这可以帮助你的 Nano 项目！

function toMegaNano(raws) {
    raws = raws.toString()
    let megaNano
    if (raws == "0") return "0"
    if ((raws.length - 30) > 0) {
      megaNano = raws.substr(0, raws.length - 30)
      fraction = raws.substr(raws.length - 30, raws.length - (raws.length - 30))
      if (fraction.length && parseInt(fraction) != 0) megaNano += '.' + fraction
    } else {
      megaNano = "0." + "0".repeat(30 - raws.length) + raws
    }
    while (megaNano[megaNano.length - 1] == '0') {
      megaNano = megaNano.substr(0, megaNano.length - 1)
    }
    return megaNano
  }

const raws = "340282366920938430000000000000000000000"
const mNano = toMegaNano(raws)
console.log(raws + " raws = " + mNano + " mNano")

我想在 php 中显示一个数字，它在小数点后有 30 位数字，而不将其四舍五入为纳米货币，有人有什么想法吗？

I want to show a number in php which has 30 digits after decimal without rounding it up for nano currency, anyone have any Idea?

php

currency

bitcoin

nano