How can the use of __set(), __get(), and __isset() impact the readability and maintainability of PHP code?

Using magic methods like __set(), __get(), and __isset() can impact the readability and maintainability of PHP code because they introduce dynamic behavior that may not be immediately obvious to someone reading the code. While they can provide flexibility, they can also make it harder to understand the flow of data within a class. It's important to use these magic methods judiciously and document their usage clearly to ensure that the code remains understandable and maintainable.

class User {
    private $data = [];

    public function __set($name, $value) {
        $this->data[$name] = $value;
    }

    public function __get($name) {
        return $this->data[$name] ?? null;
    }

    public function __isset($name) {
        return isset($this->data[$name]);
    }
}