How to write double constants

Question

Hey i want to write username - john
And age - 28 but how help
<?php
define("username""age", " john! ,28");
echo username
;
?>

Answer 1

What do you mean by double constant?
Just use two defines:
define("username", "john");
define("age", 28);

Answer 2

i doubt this is even how that code should work....

Answer 3

Thanks