将逗号作为小数点的数字转换为浮点数 [英] Converting a number with comma as decimal point to float

问题描述

我有一个价格列表，用逗号作为小数点，用点作为千位分隔符.

I have a list of prices with a comma for a decimal point and a dot as the thousand separator.

一些例子:

12,30
116,10
1.563,14

这些来自第三方的这种格式.我想将它们转换为浮点数并将它们加在一起.

These come in this format from a third party. I want to convert them to floats and add them together.

这样做的最佳方法是什么?number_format 似乎不适用于这种格式，而 str_replace 似乎有点矫枉过正，因为我必须对每个数字多做一次.

What is the best way to do this? number_format doesn't seem to work with this format, and str_replace seems like overkill, as I have to do it more that once on each number.

有没有更好的方法?谢谢.

Is there are better way? Thanks.

推荐答案

使用 str_replace() 去除圆点并不过分.

Using str_replace() to remove the dots is not overkill.

$string_number = '1.512.523,55';
// NOTE: You don't really have to use floatval() here, it's just to prove that it's a legitimate float value.
$number = floatval(str_replace(',', '.', str_replace('.', '', $string_number)));

// At this point, $number is a "natural" float.
print $number;

这几乎可以肯定是您可以执行此操作的 CPU 密集程度最低的方法，而且很可能即使您使用一些奇特的函数来执行此操作，这也是它在幕后所做的事情.

This is almost certainly the least CPU-intensive way you can do this, and odds are that even if you use some fancy function to do it, that this is what it does under the hood.

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