将整数转为货币数值

function my_number_format($number){
    if( !is_int($number))
        return false;
    $after_convert_number = '';
    do{
        $after_convert_number = ','.substr($number,-3)."$after_convert_number";
    }while($number = (int)($number/1000));
    return substr($after_convert_number,1);
};