Fellow Sololearners I need help with php, I don't get what's happening here

Question

<?php
define("MSG", "Hi SoloLearners!");
echo MSG;

// Outputs "Hi SoloLearners!"
?>

Answer 1

define(identifier, constant_value)
This is a way to create a constant.

https://www.php.net/manual/en/language.constants.syntax.php

Answer 2

ChaoticDawg , so what's the constant here?

Answer 3

It would be similar to:
const MSG = "Hi SoloLearners!";
Review the provided link it should answer your questions.