INT function?

Just curious what the function is to convert x into an integer if it's a float.... Say for example I have something like this $x = 7; $y = 3; $z = $x / $y; I want $z to equal 2. In perl it would be $z = int($x / $y); I'm just not sure how to do this in PHP, as int apparently doesn't work (darn). I'm using 4.06 by the way, so if there's some new function in 4.1 that does this, I can't use it... so < 4.1 functions please