Tutorial example of how many decimal places to retain in PHP

Content of this section:
PHP retains several decimal places

Example:

<?php
$n = "10.6789";
//一、保留2位小数点，并四舍五入
//使用round()方法
echo round($n,2);
echo "<br>";
//使用number_format()方法
echo number_format($n,2);echo "<br>";
//使用sprintf()方法
echo sprintf("%.2f",$n);echo "<br>";

//2. Keep 2 decimal places, but not rounded

echo ((int)($n*100))/100;

Attached, PHP's function to get the number of decimal places number_format is a simple example.

string number_format ( float number [, int decimals [, string dec_point, string thousands_sep]] )

Code:

 <?
$short_pi = "3.14159";$my_pi = number_format($short_pi, 2);echo $my_pi."\n";   // 3.14$foo = 850017.9021; // www.jbxue.com$new_foo = number_format($foo, 3, ".", " ");echo $new_foo."\n";  // 850 017.902?>

Description:
number_format function is used to format the number $number.
The second function decimals is used to retain the following digits of the number.

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