Shortest way to check if a variable contains positive integer using PHP?

Question

I want to check if user input a positive integer number.

1    = true
+10  = true
.1   = false
-1   = false
10.5 = false


Just a positive number. 
No charact         


        

Answer 1

I would say this is the best way

if (is_int($num) && $num > 0)

as typecasting to an int is very slow.