Using PHP interfaces in Codeigniter

Here's How to Get CodeIgniter to Load Interfaces Properly

In your application/config/autoload.php:

// Add "interface_autoloader" to your models array$autoload['model'] = array('interface_autoloader');

Now create a new class in your application/models folder "interface_autoloader.php":

<?phpclass Interface_autoloader {    public function __construct() {        $this->init_autoloader();    }    private function init_autoloader(){        spl_autoload_register(function($classname){            if( strpos($classname,'interface') !== false ){                strtolower($classname);                require('application/interfaces/'.$classname.'.php');            }        });    }}

Now create a new folder in your application folder called "interfaces":

Then just add your interfaces into the "interfaces" folder and you should be able to use them like normal.

I'm using interfaces in my codeigniter project. I just do it:

Some classes need to extends a personal Controller, so I have created the librarie called Module_Controller extends Controller. This library is autoloaded.

In the same file, I have been declared the interface. So, my file libraries/Module_Controller.php has the following code:

class Module_Controller extends Controller{...}interface modular{...}

In this way, when this file be loaded, the interface will be declared for everyone.

You can create MY_Loader class extends CI_Loader into application/core and make load your interfaces.

Here has a sample: http://heatherevens.me.uk/2013/11/11/interfaces-in-codeigniter/