How to convert to two decimal places in php

How to convert php to two decimal places: 1. Use "round()" to round floating point numbers; 2. Use "sprintf" to format strings; 3. Use thousands grouping to format numbers The function "number_format()".

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Three ways to retain two decimal places in PHP

/**
 * 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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