Error: la clase debe declararse abstracta o implementar los métodos restantes

Question

Tengo una clase que implementa varios métodos abstractos. Cuando extiendo esa clase me sale el siguiente mensaje de error grave:

Class CI_Controller_Rest contains 6 abstract methods and must therefore be declared abstract or implement the remaining methods 

La clase con métodos abstractos:

class CI_Controller_Rest extends CI_Controller { 
    public function __construct() { 
     parent::__construct(); 
    } 

    abstract public function index(); 

    abstract public function get(); 

    abstract public function head(); 

    abstract public function post(); 

    abstract public function put(); 

    abstract public function delete(); 
} 

La clase donde extiendo CI_Controller_Rest:

class Welcome extends CI_Controller_Rest { 

    public function __construct() 
    { 
     parent::__construct(); 
    } 

    public function index() {} 

    public function get() {} 

    public function head() {} 

    public function post() {} 

    public function put() {} 

    public function delete() {} 
} 

Lo que debería hacerlo hacer más que esto?

Answer 1

Si una clase tiene una o más funciones abstractas, it MUST be declared as an abstract class:

abstract class CI_Controller_Rest extends CI_Controller { 

    public function __construct() { 
     parent::__construct(); 
    } 

    abstract public function index(); 

    abstract public function get(); 

    abstract public function head(); 

    abstract public function post(); 

    abstract public function put(); 

    abstract public function delete(); 
} 

Answer 2

abstract class CI_Controller_Rest extends CI_Controller { 
    public function __construct() { 
     parent::__construct(); 
    } 

    abstract public function index(); 

    abstract public function get(); 

    abstract public function head(); 

    abstract public function post(); 

    abstract public function put(); 

    abstract public function delete(); 
} 

Answer 3

CI_Controller_Rest debe ser una clase abstracta, ya que contiene métodos abstractos

abstract class CI_Controller_Rest extends CI_Controller { 
    public function __construct() { 
     parent::__construct(); 
    } 

    abstract public function index(); 

    abstract public function get(); 

    abstract public function head(); 

    abstract public function post(); 

    abstract public function put(); 

    abstract public function delete(); 
}