How can I receive different response from PHP file?

I wonder how to get a different name each time I request this file

first request name1

second request name2

and so on…
using code bellow I get response always NAME1
what should I put there to make the response different each time

$result = [
 'prefixes' => 'Mr',               //must be one of ["Mr", "Mrs", "Mme", "Miss"]
 'name' => 'NAME1,NAME2,NAME3,NAME4........',   //required
 'nickname' => 'admin',             //optional
 'password' => '123456'         //optional
];