How to keep two decimal places in php

This article mainly introduces several methods of retaining two decimal places in PHP. Such a demand is often encountered in some product prices. Today I will share with you the example code , Friends in need can refer to the

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The code is as follows:

$num = 10.4567;  
  //第一种：利用round()对浮点数进行四舍五入
  echo round($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

Let’s take a look at the price calculation or price display of some products in PHP. It needs to be accurate to two digits after the decimal point, which is the unit of cents in our usual RMB. So how to display the price of the product in PHP and retain the unit of cents? Below

PHP number_format() function

Number_format(): The function can format numbers by grouping thousands.

Syntax:

number_format(number,decimals,decimalpoint,separator)

Parameters:

Number: required. The number to format.

Decimals: optional. Specify the number of decimals.

Decimalpoint: optional. Specifies the string used as the decimal point.

Separator: optional. Specifies the string used as thousands separator.

Example: PHP product price is in yuan, with two decimal places

<?php
$a = 10;
echo number_format($a,&#39;2&#39;);
$b = 1000000;
echo number_format($b,&#39;2&#39;);
$c = 5458.5684;
echo number_format($c,&#39;2&#39;);
$d = &#39;1254.8963&#39;;
echo number_format($d,&#39;2&#39;);
$e = &#39;88.9643&#39;;
echo number_format($e,&#39;2&#39;);
?>

Output result:

10.00
1,000,000.00
5,458.57
1,254.90
88.96

Summary of the above example:

1. No matter Numbers of numeric type or string type can be operated by the number_format() function

2. When number_format() operates numbers that do not contain decimals, if the number of decimals is set, it will be 0 is added.

3. If you operate a number with many decimal places, the nearest digit will be rounded off

4. If number_format() is not set, the third and fourth Parameters, if the integer part is more than 3 digits, then starting from the left of the decimal point to the right, every three digits are separated by ','

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