format for money

[hal12b]

How can I format these variables for currency?

$numberofbook = $_POST['BOOKS'];
$bookexpense = ($numberofbook * 5.95);
$shippingbook = 3.00;

I saw this online --> number_format but it didn't work.
Hal

[coopster]

Why didn't that work? Will money_format() [php.net] work?

[hal12b]

Ok it works, but how do you add the dollar sign? Do I need to add it manually? In ASP the Format Currency function added the $ sign.

[coopster]

I usually just concatenate the dollar sign if needed.

<?php 
$value = 1234.56; 
print '$'.number_format($value, 2); 
?>