How can dependency injection be implemented in PHP applications using toroPHP or similar frameworks?

Dependency injection is a design pattern that allows for the inversion of control in an application by passing dependencies into a class rather than creating them within the class itself. This promotes code reusability, testability, and scalability. In PHP applications using toroPHP or similar frameworks, dependency injection can be implemented by defining dependencies in a container and injecting them into classes when they are instantiated. 

// Define a container to hold dependencies
$container = new \League\Container\Container();

// Define dependencies in the container
$container->add('Logger', \App\Services\Logger::class);
$container->add('Database', \App\Services\Database::class);

// Use dependency injection in a class
class MyClass {
    protected $logger;
    protected $database;

    public function __construct($logger, $database) {
        $this->logger = $logger;
        $this->database = $database;
    }

    public function doSomething() {
        $this->logger->log('Doing something...');
        $result = $this->database->query('SELECT * FROM table');
        return $result;
    }
}

// Instantiate the class with dependencies injected
$myClass = $container->get('MyClass');
$myClass->doSomething();

Keywords

dependency injection toroPHP PHP applications frameworks implementation

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