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

The first example is using round to verify that the input is an integer, and not a different numeric value (ie: a decimal).

is_int will return false if passed a string. See the PHP manual examples for is_int