PHP number: decimal point visible only if needed

Question

I\'d like to know if exists some function to automatically format a number by it\'s decimal, so if I have:

Answer 1

If you are targeting US currency I like to use this method:

function moneyform($number, $symbol = true) {
    return str_replace(".00", "", money_format(($symbol? '%.2n' : "%!n"), $number));
}

moneyform(1300999);
-->$1,300,999

moneyform(2500.99);
-->$2,500.99

moneyform(2500.99, false);
-->2,500.99