<?php

class juan
{
    public $name;
    private $something;

    public function Display4()
    {
        echo 4;
    }

    public function DisplaySomething($val)
    {
        $this->something = $val;
        return $this->something;
    }
}

$new = new juan();

echo $new->name;
$new->name = "Rafael";
$new->Display4();
$new->name = "juan";
echo $new->name;
echo $new->DisplaySomething("LOL");

?>