<?php

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

class Father {

	// Property
	public $lastName;

	// Method
	public function getLastName() {
		return $this->lastName;
	}

}

//////////////////////////////////////

class Father {

}

class Son extends Father {

}

////////////////////////////////////////

class Father {

	protected $lastName = 'OOP';

	public function getLastName() {
		return $this->lastName;
	}

}

class Son extends Father {

	public function getLastName() {
		return 'Not ' . $this->lastName;
	}

}

$father = new Father();
echo $father->getLastName();	// return OOP

$son = new Son();
echo $son->getLastName();	// return Not OOP

////////////////////////////////////////

abstract class Person {

}

class Father extends Person {

}

final class Son extends Father {

}

class Grandson extends Son {

}

$person = new Person();			// return Cannot instantiate class Person
$father = new Father();
$son = new Son();
$grandson = new Grandson();		// Cannot exist. To declare an extension
					// of a final class kills the execution

////////////////////////////////////////

class Father {

	public $public;
	protected $protected;
	private $private;

}

////////////////////////////////////////

class Numbers {

	const pi = 3.14;

	public function getPi() {
		return self::pi;
	}

}

$numbers = new Numbers();
echo $numbers->getPi();		// return 3.14

////////////////////////////////////////

class Numbers {

	const pi = 3.14;

	public function getPi() {
		return self::pi;
	}

}

class App extends Numbers {

	const version = 1.0;

	public function getItAll() {
		echo 'App version: ' . self::version;
		echo 'Pi number: ' 	. parent::pi;
	}

}

$app = new App();
echo $app->getPi();		// return 3.14
echo $app->getItAll();		// return App version: 1.0 Pi number: 3.14

////////////////////////////////////////

class Statics {

	public const staticConst = 'Static Const';

	public static $staticProperty = 'Static Property';

	public static function staticMethod() {
		return 'Static Method';
	}

}

echo Statics::staticConst;			// return Static Const
echo Statics::$staticProperty;			// return Static Property
echo Statics::staticMethod();			// return Static Method

////////////////////////////////////////

class WineHouse {

	public $name = 'Wine House';

}

class Wine {

	public $wineHouse;

	public function __construct($wineHouse) {
		$this->wineHouse = $wineHouse;
	}

}

$wineHouse = new WineHouse();
$wine = new Wine($wineHouse);

echo $wine->wineHouse->name;	// return Wine House

//////////////////////////////////////

class Product {

	public $name;

	public function __construct($name) {
		$this->name = $name;
	}

}

class Cart {

	public $products;

	public function addProduct(Product $product) {
		$this->products[] = $product;
	}

	public function getAllProducts() {
		return $this->products;
	}

}

$productA = new Product('Product A');
$productB = new Product('Product B');
$productC = new Product('Product C');

$cart = new Cart();
$cart->addProduct($productA);
$cart->addProduct($productB);
$cart->addProduct($productC);

print_r($cart->getAllProducts());
/*

return Array (
	[0] => Product Object ( [name] => Product A )
	[1] => Product Object ( [name] => Product B )
	[2] => Product Object ( [name] => Product C )
)

*/

//////////////////////////////////////

class Contact {

	public $name = 'Contact';

}

class Client {

	public $contact;

	public function __construct() {

		$this->contact = new Contact();

	}

}

$client = new Client();
echo $client->contact->name;

////////////////////////////////////////

class Person {

	private $age;

	public function __set($property, $value) {
		$this->property = $value;
		echo $property . ' = ' . $value;
	}

	public function __get($property) {
		echo 'This property is private/protected: ' . $property;
	}

	public function __call($method, $parameters) {
		echo 'The method '. $method . ' does not exist.';
	}

}

$person = new Person();
$person->age = 30;			// return age = 30
echo $person->age;			// return This property is private/protected: age

$person->setFavoriteMovie('Lion King'); // return The method setFavoriteMovie does not exist

//////////////////////////////////////

require_once('ClassA.php');
require_once('ClassB.php');
require_once('ClassC.php');

function __autoload($class) {

	require_once($class . '.php');

}

$objectA = new ClassA();
$objectB = new ClassB();
$objectC = new ClassC();

echo $objectA->name;
echo $objectB->name;
echo $objectC->name;

//////////////////////////////////////