Short Number Formatter for PHP (1000 to 1k; 1m; 1b; 1t)

short-number-format.php

<?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
*/

Division is more costly than multiplication, https://stackoverflow.com/questions/4125033/floating-point-division-vs-floating-point-multiplication#answer-4125074

For better performance use multiplication where its possible.

// 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);
        $suffix = '';
    } elseif ($n < 900000) {
        // 0.9k-850k
        $n_format = number_format($n * 0.001, $precision);
        $suffix = 'K';
    } elseif ($n < 900000000) {
        // 0.9m-850m
        $n_format = number_format($n * 0.000001, $precision);
        $suffix = 'M';
    } elseif ($n < 900000000000) {
        // 0.9b-850b
        $n_format = number_format($n * 0.000000001, $precision);
        $suffix = 'B';
    } else {
        // 0.9t+
        $n_format = number_format($n * 0.000000000001, $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;
}

I created a gist after reviewing the original method and included a Laravel Helper Class.

The match expression introduced in PHP 8.0 evaluates the respective result of the first arm whose condition evaluates to true. The default keyword is used to cover any remaining cases if needed. Here, the match expression replaced the if and else if conditions, making the function easier to read and more optimised. It also eliminates the need to call number_format multiple times with different parameters.

https://gist.github.com/DerekBuntin/f78de4eb1ad90bc3c33dcc61bd02d5b5

@DerekBuntin thanks 🍻! Your link is linked incorrectly and 404s - copy and pasting the URL works though!

https://gist.github.com/DerekBuntin/f78de4eb1ad90bc3c33dcc61bd02d5b5

@kingsloi strange, I just clicked the link and it took me through to the page? Glad you got there though :-)