number_format
(PHP 4, PHP 5)
number_format — Format a number with grouped thousands
说明
string number_format ( float $number [, int $decimals = 0 ] ) string number_format ( float $number , int $decimals = 0 , string $dec_point = '.' , string $thousands_sep = ',' )This function accepts either one, two, or four parameters (not three):
If only one parameter is given, number will be formatted without decimals, but with a comma (",") between every group of thousands.
If two parameters are given, number will be formatted with decimals decimals with a dot (".") in front, and a comma (",") between every group of thousands.
If all four parameters are given, number will be formatted with decimals decimals, dec_point instead of a dot (".") before the decimals and thousands_sep instead of a comma (",") between every group of thousands.
返回值
A formatted version of number.
参数
- number
-
The number being formatted.
- decimals
-
Sets the number of decimal points.
- dec_point
-
Sets the separator for the decimal point.
- thousands_sep
-
Sets the thousands separator.
更新日志
| 版本 | 说明 |
|---|---|
| 5.4.0 | This function now supports multiple bytes in dec_point and thousands_sep. Only the first byte of each separator was used in older versions. |
范例
Example #1 number_format() Example
For instance, French notation usually use two decimals,
comma (',') as decimal separator, and space (' ') as
thousand separator. This is achieved with this line :
<?php
$number = 1234.56;
// english notation (default)
$english_format_number = number_format($number);
// 1,235
// French notation
$nombre_format_francais = number_format($number, 2, ',', ' ');
// 1 234,56
$number = 1234.5678;
// english notation without thousands separator
$english_format_number = number_format($number, 2, '.', '');
// 1234.57
?>
参见
- money_format() - Formats a number as a currency string
- sprintf() - Return a formatted string
- printf() - 输出格式化字符串
- sscanf() - Parses input from a string according to a format
