乘以字符串值

I have a string like this:

$price = "15.50";

And I would like to multiply it. Ex:

$price*$amount;

I tried something like this:

$Total = floatval($price)*$amount;

But I always get "30" as return. How can I code to get "31.00"?

Thanks a lot.

Try this...

$fltAmount = floatval($amount);
$fltPrice = floatval($price);
$Total = $fltAmount*$fltPrice

I found the answer here! http://www.php.net/manual/en/ref.var.php

You need to have float as datatype. This gets easily typecasted into int. So, do this!

$Total = floatval($amount) * floatval($price);