Best way to check for positive integer (PHP)?

Question

I need to check for a form input value to be a positive integer (not just an integer), and I noticed another snippet using the code below:

$i = $user_input_v         


        

Answer 1

if(isset($i) && is_int($i) && $i >= 0){ //0 is technically a postive integer I suppose
    return TRUE; //or FALSE I think in your case.
}