(PHP 4, PHP 5, PHP 7, PHP 8)
number_format — Format a number with grouped thousands
$num,$decimals = 0,$decimal_separator = ".",$thousands_separator = ","Formats a number with grouped thousands and optionally decimal digits using the rounding half up rule.
numThe number being formatted.
decimals
Sets the number of decimal digits.
If 0, the decimal_separator is
omitted from the return value.
As of PHP 8.3.0, when the value is negative, num
is rounded to decimals significant digits before
the decimal point.
Prior to PHP 8.3.0, negative values were ignored and handled the
same as 0.
decimal_separatorSets the separator for the decimal point.
thousands_separatorSets the thousands separator.
A formatted version of num.
| Version | Description |
|---|---|
| 8.3.0 |
Added handling of negative values for decimals.
|
| 8.0.0 | Prior to this version, number_format() accepted one, two, or four parameters (but not three). |
| 7.2.0 |
number_format() was changed to not being able to return
-0, previously -0 could be returned
for cases like where num would be -0.01.
|
Example #1 number_format() Example
For instance, French notation usually use two decimals, comma (',') as decimal separator, and space (' ') as thousand separator. The following example demonstrates various ways to format a number:
<?php
$number = 1234.56;
// english notation (default)
echo number_format($number), PHP_EOL;
// 1,235
// French notation
echo number_format($number, 2, ',', ' '), PHP_EOL;
// 1 234,56
$number = 1234.5678;
// english notation without thousands separator
echo number_format($number, 2, '.', ''), PHP_EOL;
// 1234.57
?>Example #2 A negative value for decimals
As of PHP 8.3.0, a negative value for decimals
is used to round the number of significant digits before the decimal
point.
<?php
$number = "1234.5678";
var_dump(number_format($number, -1));
var_dump(number_format($number, -2));
var_dump(number_format($number, -3));
?>The above example will output:
string(5) "1,230" string(5) "1,200" string(5) "1,000"
It's not explicitly documented; number_format also rounds:<?php$numbers = array(0.001, 0.002, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009);foreach ($numbers as $number) print $number."->".number_format($number, 2, '.', ',')."<br>";?>0.001->0.000.002->0.000.003->0.000.004->0.000.005->0.010.006->0.010.007->0.010.008->0.010.009->0.01Note: use NumberFormatter to convert in human-readable format instead user function from comments:<?phpecho NumberFormatter::create('en', NumberFormatter::SPELLOUT)->format(12309); // twelve thousand three hundred nineecho NumberFormatter::create('ru', NumberFormatter::SPELLOUT)->format(12307.5); // двенадцать тысяч триста семь целых пять десятых?>Outputs a human readable number.<?php # Output easy-to-read numbers # by james at bandit.co.nz function bd_nice_number($n) { // first strip any formatting; $n = (0+str_replace(",","",$n)); // is this a number? if(!is_numeric($n)) return false; // now filter it; if($n>1000000000000) return round(($n/1000000000000),1).' trillion'; else if($n>1000000000) return round(($n/1000000000),1).' billion'; else if($n>1000000) return round(($n/1000000),1).' million'; else if($n>1000) return round(($n/1000),1).' thousand'; return number_format($n); }?>Outputs:247,704,360 -> 247.7 million866,965,260,000 -> 867 billionIf you want to display a number ending with ,- (like 200,-) when there are no decimal characters and display the decimals when there are decimal characters i use:function DisplayDouble($value) { list($whole, $decimals) = split ('[.,]', $value, 2); if (intval($decimals) > 0) return number_format($value,2,".",","); else return number_format($value,0,".",",") .",-"; }formatting numbers may be more easy if u use number_format function.I also wrote this :function something($number){ $locale = localeconv(); return number_format($number, $locale['frac_digits'], $locale['decimal_point'], $locale['thousands_sep']);}hope this helps =)[]'sFor Zero fill - just use the sprintf() function$pr_id = 1;$pr_id = sprintf("%03d", $pr_id);echo $pr_id;//outputs 001-----------------$pr_id = 10;$pr_id = sprintf("%03d", $pr_id);echo $pr_id;//outputs 010-----------------You can change %03d to %04d, etc.I ran across an issue where I wanted to keep the entered precision of a real value, without arbitrarily rounding off what the user had submitted.I figured it out with a quick explode on the number before formatting. I could then format either side of the decimal.<?php function number_format_unlimited_precision($number,$decimal = '.') { $broken_number = explode($decimal,$number); return number_format($broken_number[0]).$decimal.$broken_number[1]; }?>