PHP strlen question

Question

Ok I am checking that a string is at least 4 characters long and 25 or less characters short

I tried to use strlen like this

$userNameSignupLength = strl         


        

Answer 1

Using strlen is correct to check the length of a string (in bytes). But a number cannot be both smaller than 4 and greater than 25 at the same time. Use || instead:

if ($userNameSignupLength < 4 || $userNameSignupLength > 25)

Now the condition is fulfilled if the number is either smaller than 4 or greater than 25.