Cannot Access Protected Property

Why This Happens

Protected properties are only accessible within the class and its subclasses. External code cannot read or write them directly. This encapsulation is intentional. Use public getter and setter methods to provide controlled access to protected properties.

The Problem

class User {
    protected string $password;

    public function __construct(string $password) {
        $this->password = password_hash($password, PASSWORD_DEFAULT);
    }
}
$user = new User('secret');
echo $user->password; // Cannot access protected property

The Fix

class User {
    protected string $password;

    public function __construct(string $password) {
        $this->password = password_hash($password, PASSWORD_DEFAULT);
    }

    public function verifyPassword(string $password): bool {
        return password_verify($password, $this->password);
    }
}
$user = new User('secret');
if ($user->verifyPassword('secret')) {
    echo 'Authenticated';
}

Step-by-Step Fix

1. 1

   Understand the visibility

   The property is protected intentionally. Determine if you should access it directly or through a method.

2. 2

   Use a getter method

   Create a public method that provides controlled access to the property value.

3. 3

   Change visibility if needed

   If the property genuinely needs to be publicly accessible, change protected to public. But prefer methods for encapsulation.