php - 将长数字缩短为 K/M/B？

Question

我已经在谷歌上搜索了很多，但根据我的查询我找不到任何有用的功能。

我想要的是:

100 -> 100
1000 -> 1,000
142840 -> 142,840

但是

2023150 -> 2.023M ( i still want 3 additional numbers for more accuracy )
5430120215 -> 5.430B

如果可能的话，我非常感谢任何自定义函数来动态选择限制。

Answer 1

使用number_format():

if ($n < 1000000) {
    // Anything less than a million
    $n_format = number_format($n);
} else if ($n < 1000000000) {
    // Anything less than a billion
    $n_format = number_format($n / 1000000, 3) . 'M';
} else {
    // At least a billion
    $n_format = number_format($n / 1000000000, 3) . 'B';
}

I would totally appreciate any custom functions to dynamically choose the limit if possible.

如果“limit”指的是小数位数(精度)，那很简单:

function custom_number_format($n, $precision = 3) {
    if ($n < 1000000) {
        // Anything less than a million
        $n_format = number_format($n);
    } else if ($n < 1000000000) {
        // Anything less than a billion
        $n_format = number_format($n / 1000000, $precision) . 'M';
    } else {
        // At least a billion
        $n_format = number_format($n / 1000000000, $precision) . 'B';
    }

    return $n_format;
}