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

What seems a simple approach would be to use modulus (%) to determine if a value is whole or not.

x = y % 1  

if y is anything other then a whole number the result is not a zero (0). A test then would be:

if (y % 1 == 0) { 
   // this is a whole number  
} else { 
   // this is not a whole number 
}

var isWhole = (y % 1 == 0? true: false);  // to get a boolean return. 

Granted this will view a negative number as a whole number, then then just wrap ABS() around y to always test on the positive.