修改小数点和千位分隔符不改变小数位数 [英] Modify decimal point and thousands separator without changing the number of decimals

问题描述

我是 php 新手，我正在尝试使用 number_format :

I'm new to php and I'm trying to use number_format :

number_format ( float $number , int $decimals = 0 , string $dec_point = "." , string $thousands_sep = "," )

如标题所示，我的目标是修改小数点和千位分隔符而不改变小数位数，如下所示:

As in the title, my goal is to modify decimal point and thousands separator without changing the number of decimals as below:

$Num=123456.789;
$Num2=number_format ($Num, [decimals as in $Num], ",", "'" );

我的结果应该是:

$Num2="123'456,789";

编辑

我需要一个未知小数位数的代码

I need a code for an unknown number of decimals

推荐答案

您可以使用 NumberFormatter.

您仍然需要指定一定数量的小数位数，但您可以使用足够高的值就可以了.这并不是说数字的数量真的是任意的.它与您的精度 ini 设置有关.

You will still need to specify a certain amount of fraction digits, but you can just use a high enough value and be fine. It's not like the number of digits is really arbitrary. It's tied to your precision ini setting.

$formatter = new NumberFormatter("en_US", NumberFormatter::DECIMAL);
$formatter->setAttribute(NumberFormatter::MAX_FRACTION_DIGITS, 42);
$formatter->setSymbol(NumberFormatter::GROUPING_SEPARATOR_SYMBOL, "'");
$formatter->setSymbol(NumberFormatter::DECIMAL_SEPARATOR_SYMBOL, ",");
echo $formatter->format(123456.7891234); // 123'456,7891234

演示 https://3v4l.org/TCAIA

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