Php和浮点数

Question

I have this example

$x = 0.154 + 0.408;
$y = 0.562;
echo $x - $y;

You would think it's 0 but it's not ( well maybe it depends on your system and php version ). Anyway for those who don't see 0, what's the correct way to do float operations ?

Answer 1

$x = bcadd (0.154 ,0.408);
$y = 0.562;
echo bcsub($x,$y);