how to add comma after numbers in php code example

Example 1: number format to float php

$num = '1,200,998.255';

########## FOR FLOAT VALUES ###########################

echo filter_var($num, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);

#output  : 1200998.255

########## FOR INTEGER VALUES ###########################

echo filter_var($num, FILTER_SANITIZE_NUMBER_INT);

#output  : 1200998

Example 2: format money with commas in php

<?php
function CurrencyFormat($number)
{
   $decimalplaces = 2;
   $decimalcharacter = '.';
   $thousandseparater = ',';
   return number_format($number,$decimalplaces,$decimalcharacter,$thousandseparater);
}
?>