<?php

class StaticMessage{
    const message = "This is the constant method";
    
    public function showMessage(){
        // echo $this->message; This throws an error.
        // or 
        echo SELF::message . PHP_EOL;
    }

}

echo StaticMessage :: message  . PHP_EOL; // Returns the message;

$newObj = new StaticMessage();
$newObj->showMessage();

?>