1. Advanced PHP Features
Namespaces and Autoloading
// NamespaceExample.php namespace MyNamespace; class NamespaceExample { public function sayHello() { echo "Hello from NamespaceExample!\n"; } } // AutoloadingExample.php spl_autoload_register(function ($class) { require_once $class . '.php'; }); use MyNamespace\NamespaceExample; $instance = new NamespaceExample(); $instance->sayHello();
Traits
// TraitExample.php trait GreetingTrait { public function greet() { echo "Greetings!\n"; } } class TraitExample { use GreetingTrait; } $instance = new TraitExample(); $instance->greet();
Generators
// GeneratorExample.php function simpleGenerator() { yield "First"; yield "Second"; yield "Third"; } foreach (simpleGenerator() as $value) { echo $value . "\n"; }
2. Object-Oriented Design Patterns
Singleton Pattern
// SingletonExample.php class SingletonExample { private static $instance; private function __construct() {} public static function getInstance() { if (self::$instance === null) { self::$instance = new self(); } return self::$instance; } } $instance = SingletonExample::getInstance();
Factory Method and Abstract Factory Patterns
// FactoryExample.php interface Product { public function getName(); } class ConcreteProduct implements Product { public function getName() { return "Concrete Product"; } } interface Factory { public function createProduct(): Product; } class ConcreteFactory implements Factory { public function createProduct(): Product { return new ConcreteProduct(); } } $factory = new ConcreteFactory(); $product = $factory->createProduct(); echo $product->getName() . "\n";
Observer Pattern
// ObserverExample.php interface Observer { public function update(string $message); } class ConcreteObserver implements Observer { public function update(string $message) { echo "Received update: $message\n"; } } class Subject { private $observers = []; public function addObserver(Observer $observer) { $this->observers[] = $observer; } public function notifyObservers(string $message) { foreach ($this->observers as $observer) { $observer->update($message); } } } $observer = new ConcreteObserver(); $subject = new Subject(); $subject->addObserver($observer); $subject->notifyObservers("Hello observers!");
These examples provide a glimpse into the discussed topics. Feel free to explore and modify them to suit your lecture’s needs.
![](https://www.khmer168.com/wp-content/uploads/2024/01/php-oop-1024x576.webp)