PHP number_format是否舍入? [英] PHP number_format is rounding?

问题描述

我的价格为"0,10"或"00000,10"

I have a price "0,10" or "00000,10"

现在当我尝试

number_format($price, 2, ',', '')

我得到0,00. 我怎样才能解决这个问题?我要0.10美元. 我不要四舍五入.

I get 0,00. How can i fix this? I want 0,10 $. I don't want rounding.

或者当我有5,678时，我得到5,68.但我要5,67.

Or when i have 5,678, i get 5,68. But i want 5,67.

推荐答案

几个人提到将其舍入为3，然后删除最后一个字符.这实际上是行不通的.假设您有2.9999，并将其四舍五入为3.000.

Several people have mentioned rounding it to 3 and then dropping the last character. This actually does not work. Say you have 2.9999 and round it to 3 it's 3.000.

这仍然不准确，最佳解决方案是:

This is still not accurate, the best solution is this:

$price = '5.678';
$dec = 2;
$price = number_format(floor($price*pow(10,$dec))/pow(10,$dec),$dec);

这是将价格乘以100(10十进制)得出567.8，然后使用下限将其乘以567，然后将其除以100得到5.67

What this does is takes the price and multiplies it by 100 (10^decimal) which gives 567.8, then we use floor to get it to 567, and then we divide it back by 100 to get 5.67

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