How to keep several decimal places in php

php method to retain decimals: 1. Use round() to round floating point numbers; 2. Use sprintf to format strings; 3. Use the function number_format() to format numbers using thousand digit grouping to retain decimals .

The operating environment of this article: Windows 7 system, PHP 7.1 version, DELL G3 computer

How do you keep several decimal places in php?

Three ways to retain two decimal places in PHP

The code is as follows:

/**
 * PHP保留两位小数的几种方法
 * @link http://www.phpddt.com
 */
$num = 10.4567;
 
//第一种：利用round()对浮点数进行四舍五入
echo round($num,2);  //10.46
 
//第二种：利用sprintf格式化字符串
$format_num = sprintf("%.2f",$num);
echo $format_num;  //10.46
 
//第三种：利用千位分组来格式化数字的函数number_format()
echo number_format($num, 2);  //10.46
//或者如下
echo number_format($num, 2, '.', '');  //10/46

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