In the context of PHP development, what are some potential pitfalls or challenges to be aware of when implementing OOP principles?

One potential pitfall in PHP development when implementing OOP principles is the misuse of inheritance, leading to tight coupling between classes and difficulty in maintaining and extending the codebase. To solve this, consider favoring composition over inheritance to promote code reusability and flexibility. 

// Example of using composition over inheritance
class Logger {
    public function log($message) {
        echo $message;
    }
}

class User {
    private $logger;

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

    public function createUser() {
        $this->logger->log('User created');
    }
}

$logger = new Logger();
$user = new User($logger);
$user->createUser();

Keywords

PHP OOP inheritance encapsulation polymorphism

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