PHP 字符串 number_format()函数

PHP字符串’number_format()’是内置的PHP函数。它用于格式化具有分组千位数的数字。它支持一个、两个或三个参数（不是三个）。

语法

number_format(number,decimals,decimalpoint,separator)

示例1

<?php
n=199.9;
echo "Your number is:".n;
echo "<br>"."By using 'number_format()' function :".number_format($n);
?>

输出：

Your number is:199.9
By using 'number_format()' function :200

示例2

<?php
n=199.9;
echo "Your number is:".n;
echo "<br>"."By using 'number_format()' function :".number_format($n,2);
?>

输出：

Your number is:199.9
By using 'number_format()' function :199.90

示例3

<?php
n=1000000;
echo "Your number is:".n;
echo "<br>"."By using 'number_format()' function :".number_format($n);
?>

输出结果：

Your number is:1000000
By using 'number_format()' function :1,000,000

示例4

<?php
n=1000000;
echo "Your number is:".n;
echo "<br>"."By using 'number_format()' function :".number_format($n,2);
?>

输出：

Your number is:1000000
By using 'number_format()' function :1,000,000.00