How to format a number with thousands separator in PHP

## In the process of daily use of numbers, there are always some special scenarios where numbers need to be displayed in a specific form. This article mainly talks about how to use number_format () function to display numbers with thousands separators.

1.number_format () syntax

number_format( float $number , int $decimals = 0  , string $dec_point = "."  , string $thousands_sep = "," )

• $number: the number to be formatted

• $decimals: The number of decimal places to be retained

• $dec_point: Specify the character displayed for the decimal point

• $thousands_sep: Specify the thousands separator Displayed characters

• If only the first parameter is provided, the decimal part of the number will be removed, and it will be separated by English "," by default.

• If two parameters are provided, number will retain the number of digits after the decimal point to the value of $decimals

• If four parameters are provided, number will retain the decimal part of $decimals length, the decimal point is replaced by $dec_point, and the thousands separator is replaced by $thousands_sep.

2. Usage example:

<?php
    $number = 12399.563;
    //只有一个参数
    $number1 = number_format($number);
    echo "$number1"."<br>";
    // 12,400

<?php
    $number2 =number_format($number,2);
    echo "$number2"."<br>";
    // 12,399.56
?>

<?php
    $number = 12348.56789;
    $number3 = number_format($number, 2, &#39;,&#39;, &#39; &#39;);
    echo "$number3"."<br>";
    // 12 348,57
?>

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