Comma Rupees php

<?php
function my_money_format($number)
{
    if(strstr($number,"-"))
    {
        $number = str_replace("-","",$number);
        $negative = "-";
    }

    $split_number = @explode(".",$number);

    $rupee = $split_number[0];
    $paise = @$split_number[1];

    if(@strlen($rupee)>3)
    {
        $hundreds = substr($rupee,strlen($rupee)-3);
        $thousands_in_reverse = strrev(substr($rupee,0,strlen($rupee)-3));
        for($i=0; $i<(strlen($thousands_in_reverse)); $i=$i+2)
        {
            $thousands .= $thousands_in_reverse[$i].$thousands_in_reverse[$i+1].",";
        }
        $thousands = strrev(trim($thousands,","));
        $formatted_rupee = $thousands.",".$hundreds;

    }
    else
    {
        $formatted_rupee = $rupee;
    }

    if((int)$paise>0)
    {
        $formatted_paise = ".".substr($paise,0,2);
    }

    return $negative.$formatted_rupee.$formatted_paise;

}
?>

http://php.net/manual/en/function.number-format.php