DOUBLE problem

Hi,

I have a field of type DOUBLE in a database.

Which function should I use to test if it contains a whole number. I.e. 4

or a real number. I.e. 4.5?

What I am trying to do is format the numer so for example. If the value is 4 it should display 4

Otherwise if the number is 4.5, it should display 4.50

Thanks

assuming $dbnum is the number you get from your database, $shownum is the number which is being put out.

$shownum = is_int($dbnum) ? $dbnum : number_format ( $dbnum, 2, ".", "");

Thanks for your help.