(PCC)[PHP] How to use Case insensitive constant name in php

Programming Code Center(PCC)
[PHP]

(PCC)::[How-to-use-Case-insensitive-constant-name-in-php]::[php]

File Name : index.php

<!DOCTYPE html>
<html>
<body>

<?php
// case-insensitive constant name
define("GREETING", "Welcome to bookofnetwork.com!", true);
echo greeting;
?> 

</body>
</html>

Output :