Codeigniter call function in nested extends controller

Question

I have a MY_Controller php file with MY_Controller class and Other_Controller that extends My_Controller class in my application/core folder.

class MY_Controller extends CI_Controller 
{
    function __construct()
    {
        parent::__construct();
    }
    function SomeMethod()
    {
        echo "method MY_Controller";
    }
}
class Other_Controller extends My_Controller 
{
    function __construct()
    {
       parent::__construct();
    }
}

On my Application/controller folder :

    Class Main extends Other_Controller
    { include(APPPATH.'core/Other_Controller.php');
        function __construct()
        {
            parent::__construct();
            // Call SomeMethod function name?
        }
    }

Can I call SomeMethod function from MY_Controller to Main Controller?

krlv · Accepted Answer · 2018-12-12 03:34:29Z

1

Yes, you can, simply use parent keyword same way as you're using it with constructor:

class Main extends Other_Controller
{
    function __construct()
    {
        parent::__construct();
        parent::SomeMethod(); // echoes "method MY_Controller"
    }
}

In case Other_Controller class overrides MY_Controller::SomeMethod, you still can call the original SomeMethod from the Main class by using full class name and scope resolution operator :::

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

    function SomeMethod()
    {
        echo "method MY_Controller";
    }
}

class Other_Controller extends My_Controller 
{
    function __construct()
    {
       parent::__construct();
    }

    function SomeMethod()
    {
        echo "method Other_Controller";
    }
}

class Main extends Other_Controller
{
    function __construct()
    {
        parent::__construct();
        parent::SomeMethod(); // echoes "method Other_Controller"
        MY_Controller::SomeMethod(); // echoes "method MY_Controller"
    }
}

edited Dec 12, 2018 at 3:34

answered Dec 12, 2018 at 3:24

krlv

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6 Comments

Mikkel Over a year ago

how to change MY_Controller::SomeMethod(); calling method to "$this->" method calling?

krlv Over a year ago

You don't need to change it to $this->SomeMethod(), because SomeMethod actually don't belong to $this class

krlv Over a year ago

Just FYI, MY_Controller::SomeMethod() works both for static and non-static methods

Mikkel Over a year ago

anyway, I just wanna know, could MY_Controller::SomeMethod() calling method be change to MY_Controller -> SomeMethod() ? thank you

krlv Over a year ago

1. If there is no overriding of SomeMethod in Other_Controller class, you can use $this->SomeMethod() - it will work just fine. 2. If SomeMethod is overridden, then MY_Controller::SomeMethod() is your best option. Unfortunately, you can't use MY_Controller -> SomeMethod()

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