(PHP 4, PHP 5, PHP 7)
number_format — 以千位分隔符方式格式化一个数字
$number
[, int $decimals = 0
] )$number
, int $decimals = 0
, string $dec_point = "."
, string $thousands_sep = ","
)本函数可以接受1个、2个或者4个参数（注意：不能是3个）:
如果只提供第一个参数，number的小数部分会被去掉
并且每个千位分隔符都是英文小写逗号","
如果提供两个参数，number将保留小数点后的位数到你设定的值，其余同楼上
如果提供了四个参数，number
将保留decimals个长度的小数部分,
小数点被替换为dec_point，千位分隔符替换为thousands_sep
number你要格式化的数字
decimals要保留的小数位数
dec_point指定小数点显示的字符
thousands_sep指定千位分隔符显示的字符
格式化以后的 number.
| 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.
|
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 way to format a number:
<?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
?>