How can PHP developers effectively manage object instantiation and visibility within classes to maintain code organization and avoid fatal errors?

To effectively manage object instantiation and visibility within classes in PHP, developers should use access modifiers like public, private, and protected to control the visibility of properties and methods. This helps in organizing code by clearly defining what can be accessed from outside the class. Additionally, using constructors and dependency injection can help in proper object instantiation and avoid fatal errors. 

class User {
    private $username;
    private $email;

    public function __construct($username, $email) {
        $this->username = $username;
        $this->email = $email;
    }

    public function getUsername() {
        return $this->username;
    }

    public function getEmail() {
        return $this->email;
    }
}

$user = new User('john_doe', 'john@example.com');
echo $user->getUsername();
echo $user->getEmail();

Keywords

PHP object instantiation visibility classes fatal errors

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