Codeigniter set constants in custom library

Question

I am using codeigniter for a project. I have a custom library in which there are constants in which I will use in my custom functions in the library. How do I declare such constants?

Answer 1

If you are going to use that constants only in your library, you must declare it inside of your class:

<?php
class my_class {
    const MY_CONSTANT = 10;

And then call it with:

self::MY_CONSTANT

If you need that your constants are available in the rest of the application, you must declare it in your application/config/constants.php file