phpeveryday.com

<?php
//define number
$amount = 3957459.7398;

//round and format number with commas
//result: "3,957,460"
$formattedAmount = number_format($amount);
echo $formattedAmount;
?>

The number_format( ) is a great tool to use in order to format large integer or floating-point numbers. Note that the output of the function is a string, not a number, and so it cannot be used for further numeric manipulation. If you have a floating-point number and don't want to round it up to an integer, you can pass number_format( ) a second argument which will control the number of decimals the formatted number should certain.

<?php
//define number
$amount = 3957459.7398;

//format number with commas and 2 decimal places
//result: "3,957,459.74"
$formattedAmount = number_format($amount, 2);
echo $formattedAmount;
?>

Furthermore, you can accomplish a custom decimal and/or thousands separator by passing number_format( ) two additional arguments. The first is for the decimal separator and the second is for the thousands separator. Here is the example beneath:

<?php
//define number
$amount = 3957459.7398;

//format number with custom separator
//result: "3'957'459,74"
$formattedAmount = number_format($amount, 2, ',', '\'');
echo $formattedAmount;
?>