(PHP 4, PHP 5, PHP 7, PHP 8)
number_format — 以千位分隔符方式格式化一个数字
$num,$decimals = 0,$decimal_separator = ".",$thousands_separator = ","使用四舍五入的规则，将数字格式化为千位分组和小数位（可选）。
num要格式化的数字。
decimals
设置小数位数。如果为 0，则从返回值中忽略 decimal_separator。
decimal_separator指定小数点的分隔符。
thousands_separator设置千位分隔符。
num 的格式化版本。
| 版本 | 说明 |
|---|---|
| 8.0.0 | 在此版本之前，number_format() 接受一个、两个或四个参数（不会是三个）。 |
| 7.2.0 |
number_format() 现在再也不会返回 -0，之前
num 为 -0.01 的情况下可以返回 -0。
|
示例 #1 number_format() 示例
例如，法语计数通常使用两位小数，逗号（“,”）作为小数分隔符，空格（“ ”）作为千位分隔符。以下示例展示了格式化数字的各种方法：
<?php
$number = 1234.56;
// 英文计数（默认）
$english_format_number = number_format($number);
// 1,235
// 法语计数
$nombre_format_francais = number_format($number, 2, ',', ' ');
// 1 234,56
$number = 1234.5678;
// 没有千位分隔符的英文计数
$english_format_number = number_format($number, 2, '.', '');
// 1234.57
?>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->0.00
0.002->0.00
0.003->0.00
0.004->0.00
0.005->0.01
0.006->0.01
0.007->0.01
0.008->0.01
0.009->0.01Note: use NumberFormatter to convert in human-readable format instead user function from comments:
<?php
echo NumberFormatter::create('en', NumberFormatter::SPELLOUT)->format(12309); // twelve thousand three hundred nine
echo 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 million
866,965,260,000 -> 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];
}
?>