PHP call function from another function inside class

Question

Im am trying to make a class, that will handle every action to the database.

My class:

class DBHandler {

    public function connect() {
      echo "<script>alert('connect')</script>"; // cant get here
    }

    public function login($username, $password) {

      // echo "<script>alert('login')</script>";

      $this->connect();
    }
}

I would like to call the connect() function from the login() function, but for some reason, I can't call the connect() function.

I thought I could achieve this with $this->myFunction();

When I test the code, it just gives me a white screen.

What am I doing horribly wrong? It looks fine to me.

Thanks in advance.

UPDATE

I don't have any access to error log files on the server