How can traits be used in PHP classes to enhance modularity and reusability of code?

Traits in PHP classes can be used to enhance modularity and reusability of code by allowing the reuse of methods in multiple classes without using inheritance. Traits can encapsulate common functionality that can be shared across different classes, promoting code reusability and reducing code duplication. By using traits, developers can easily compose classes with specific sets of behaviors, making their code more modular and maintainable.

<?php
trait Logger {
    public function log($message) {
        echo $message;
    }
}

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

class Product {
    use Logger;
    
    public function createProduct() {
        $this->log('Product created');
    }
}

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

$product = new Product();
$product->createProduct();
?>