php number format

$num = 12345.6789;
echo number_format($num, 2, '.', '') //12345.67
echo number_format($num, 3, ',', '.') //12.345,678

<?php
echo number_format("1000000")."<br>";
echo number_format("1000000",2)."<br>";
echo number_format("1000000",2,",",".");
?>

// string number_format ($number, $decimals, $decimalpoint, $seperator)

// Enter the number you wish to format using decimals
// to set the number of decimal places
// You can replace the '.' with your own string
// with the decimalpoint parameter.
// With seperator, you can specify a string to be used
// to seperate thousands.

$num = 123456.789;
echo number_format($num); // 123,456
echo number_format($num, 4); // 123,456.7890
echo number_format($num, 4, '#'); // 123,456#7890
echo number_format($num, 5, '#', 'T'); // 123T456#78900