What are the methods to determine the exact number of decimal places in PHP?

php Method for decimal precision: 1. Use sprintf() function to format, syntax "sprintf("%.decimal digits f",$num)"; 2. Use number_format() function , syntax "number_format($num,'number of decimal places')".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php decimal precision decimal point Method for the last digit

Method 1: Use sprintf to format the string

<?php
header("Content-type:text/html;charset=utf-8");
$num = 10.4567;
$format_num = sprintf("%.2f",$num);
echo $format_num;  //10.46
?>

Method 2: Use the 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 how many decimal points

• decimalpoint: Optional. Specifies the string used as the decimal point.

• separator: Optional. Specifies the string used as thousands separator.

Example:

<?php
header("Content-type:text/html;charset=utf-8");
$num = 10.4567;
$format_num = number_format($num,&#39;1&#39;);
echo $format_num."<br>";
$format_num = number_format($num,&#39;2&#39;);
echo $format_num."<br>";
$format_num = number_format($num,&#39;3&#39;);
echo $format_num;
?>

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