PHP最低的共同面额

Question

I am working on a payment gateway and the amount parameter needs to formatted this way:
amount – (digits only) the integer value of the transaction in lowest common denomination (ex. $5.20 is 520)
I have already removed the $ and all values will be rounded to 2 decimal places.

In PHP if i try to cast amount as int ie (int)$amount I am going to loose the .20 in the example though its needed. What could be the best way to go about this?

Answer 1

You can multiply the amount by 100 and then convert it...

$amount = (int)($amount*100);

So 5.20 becomes 520.