将长数缩短为K/M/B？

Question

我已经google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

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

如果可能的话,我会非常感谢任何自定义函数来动态选择限制.

谢谢!

Answer 1

用途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';
}

如果可能的话,我会非常感谢任何自定义函数来动态选择限制.

如果"limit"指的是小数位数(精度),这很容易:

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;
}

Answer 2

我接受了BoltClock提供的答案,并在考虑到配置的情况下稍微调整了一下.

// Shortens a number and attaches K, M, B, etc. accordingly
function number_shorten($number, $precision = 3, $divisors = null) {

    // Setup default $divisors if not provided
    if (!isset($divisors)) {
        $divisors = array(
            pow(1000, 0) => '', // 1000^0 == 1
            pow(1000, 1) => 'K', // Thousand
            pow(1000, 2) => 'M', // Million
            pow(1000, 3) => 'B', // Billion
            pow(1000, 4) => 'T', // Trillion
            pow(1000, 5) => 'Qa', // Quadrillion
            pow(1000, 6) => 'Qi', // Quintillion
        );    
    }

    // Loop through each $divisor and find the
    // lowest amount that matches
    foreach ($divisors as $divisor => $shorthand) {
        if (abs($number) < ($divisor * 1000)) {
            // We found a match!
            break;
        }
    }

    // We found our match, or there were no matches.
    // Either way, use the last defined value for $divisor.
    return number_format($number / $divisor, $precision) . $shorthand;
}

Answer 3

function number_abbr($number)
{
    $abbrevs = [12 => 'T', 9 => 'B', 6 => 'M', 3 => 'K', 0 => ''];

    foreach ($abbrevs as $exponent => $abbrev) {
        if (abs($number) >= pow(10, $exponent)) {
            $display = $number / pow(10, $exponent);
            $decimals = ($exponent >= 3 && round($display) < 100) ? 1 : 0;
            $number = number_format($display, $decimals).$abbrev;
            break;
        }
    }

    return $number;
}

适用于正面和负面。

Answer 4

<?php
// Converts a number into a short version, eg: 1000 -> 1k
// Based on: http://stackoverflow.com/a/4371114
function number_format_short( $n, $precision = 1 ) {
    if ($n < 900) {
        // 0 - 900
        $n_format = number_format($n, $precision);
        $suffix = '';
    } else if ($n < 900000) {
        // 0.9k-850k
        $n_format = number_format($n / 1000, $precision);
        $suffix = 'K';
    } else if ($n < 900000000) {
        // 0.9m-850m
        $n_format = number_format($n / 1000000, $precision);
        $suffix = 'M';
    } else if ($n < 900000000000) {
        // 0.9b-850b
        $n_format = number_format($n / 1000000000, $precision);
        $suffix = 'B';
    } else {
        // 0.9t+
        $n_format = number_format($n / 1000000000000, $precision);
        $suffix = 'T';
    }
  // Remove unecessary zeroes after decimal. "1.0" -> "1"; "1.00" -> "1"
  // Intentionally does not affect partials, eg "1.50" -> "1.50"
    if ( $precision > 0 ) {
        $dotzero = '.' . str_repeat( '0', $precision );
        $n_format = str_replace( $dotzero, '', $n_format );
    }
    return $n_format . $suffix;
}
/*
Example Usage:
number_format_short(7201); // Output: 7.2k
Demo:
echo '<table>';
for($d = 0; $d < 16; $d++ ) {
    $n = intval("09" . str_repeat( "0", $d ));
    $n = $n / 10;
    echo number_format_short($n) .'<br>'; // 0.9
    $n = intval("1" . str_repeat( "0", $d ));
    echo number_format_short($n) .'<br>'; // 1.0
    $n = intval("11" . str_repeat( "0", $d ));;
    $n = $n / 10;
    echo number_format_short($n) .'<br>'; // 1.1
}
echo '</table>';
Demo Output:
0.9
1
1.1

9
10
11

90
100
110

0.9K
1K
1.1K

9K
10K
11K

90K
100K
110K

0.9M
1M
1.1M

9M
10M
11M

90M
100M
110M

0.9B
1B
1.1B

9B
10B
11B

90B
100B
110B

0.9T
1T
1.1T

9T
10T
11T

90T
100T
110T

900T
1,000T
1,100T
*/