Error: Class must be declared abstract or implement the remaining methods
<p>I have a class that implements several abstract methods. When I extend that class I get the following fatal error message:  </p>

<pre><code>Class CI_Controller_Rest contains 6 abstract methods and must therefore be declared abstract or implement the remaining methods  
</code></pre>

<p>The class with abstract methods:  </p>

<pre><code>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();
}  
</code></pre>

<p>The class where I extend <code>CI_Controller_Rest</code>:  </p>

<pre><code>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() {}
}  
</code></pre>

<p>What should I do more than this?</p>
