Strange Float to Int Conversion With 1

[zhoppy]

Hey guys,

 

I'm having trouble with float(1) converting to int(0) Quick sample code below. Anyone have any ideas?

 

Thanks!

-Zac

 

$a = 7.1;
$i = (($a-7) * 10);
//var_dump($i);
var_dump((int)$i);

$a = 7.1:

Output: int(0)

Expected: int(1)

$a = 7.2:

Output: int(2)

Expected: int(2)