PHP check if variable is a whole number

Question

I have this PHP code:

$entityElementCount = (-($highScore-$totalKeywordCount))/0.29;

What i want to know is, how to check whether $

Answer 1

    $num = 2.0000000000001;
    if( $num == floor( $num  ) ){
        echo('whole');
    }else{
        echo('fraction');
    }

EX:

2.0000000000001 | fraction

2.1 | fraction

2.00 | whole

2 | whole