OO PHP Accessing public variable from another class

Question

I have a class like the following:

class game {

    public $db;
    public $check;
    public $lang;

    public function __construct() {

        $this->che         


        

Answer 1

Since the property is public, you can access it from outside the class as $objInstance->property. It doesn't matter if you're calling it from a function, procedural script, in another object. As long as you have the instance, you can call it's public property. Ex:

function foo($c) {
    echo $c->lang;
}
foo($check);

Also, some advice on working with objects and such: It's considered better code if you don't create instances of objects in the other objects, but rather pass them in someway (either a setter method or through the constructor). This keeps the classes loosely coupled and results in code that is more reusable and easier to test. So:

class Game
{

...
public function __construct($check, $defaultLang, $get) {

    $this->check = $check;

    $this->lang = $defaultLang;
    if (isset($get['lang']) && !$this->check->isEmpty($get['lang']))
        $this->lang = $get['lang'];
}
...

$game = new Game(new Check(), DEFAULT_LANG, $_GET);
echo $game->check;

The first half of this article is an accessible explanation of what is known as Dependency Injection.