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 other best way to check a Integer number is using regular expression. You can use the following code to check Integer value. It will false for float values.

if(preg_match('/^\d+$/',$i)) {
  // valid input.
} else {
  // invalid input.
}

It's better if you can check whether $i > 0 too.