Echoing Decimal Place Only?

[ShoeLace1291]

Ok, I'm trying to make a 5 star rating system so I need to find out what the decimal place is and whether or not to round to .5 or to .0.  How do I display just the decimal place?

 

Example:

3.7

 

how do i just find the 7?

 

I thought about using substr, but that would only work if the decimal places would be the same length.

[ratcateme]

substr($number,strpos($number,'.')+1);

 

Scott.

[GingerRobot]

$num = 3.67;
$decimal = $num - floor($num);