Call to Private Method

Why This Happens

PHP enforces visibility modifiers strictly. Private methods can only be called from within the same class. If another class or external code tries to call a private method, PHP throws this error. This encapsulation is intentional, so consider whether exposing the method is appropriate.

The Problem

class User {
    private function hashPassword(string $password): string {
        return password_hash($password, PASSWORD_DEFAULT);
    }
}
$user = new User();
$hash = $user->hashPassword('secret'); // Cannot access private method

The Fix

class User {
    public function setPassword(string $password): void {
        $this->passwordHash = $this->hashPassword($password);
    }

    private function hashPassword(string $password): string {
        return password_hash($password, PASSWORD_DEFAULT);
    }
}
$user = new User();
$user->setPassword('secret');

Step-by-Step Fix

1. 1

   Understand the access restriction

   The method is private because the author intended it for internal use only. Determine if you should be calling it directly.

2. 2

   Use a public interface

   Look for a public method that wraps the private logic, or create one if the functionality needs to be exposed.

3. 3

   Change visibility if appropriate

   If the method genuinely needs external access, change private to public or protected, considering the impact on encapsulation.