RESTful remap method for CodeIgniter controllers

codeigniter-restful-remap.php

<?php
/**
 * RESTful remap method for CodeIgniter controllers
 * 
 * @author Clint Tyler <ctyler@cdtwebsolutions.com>
 */
class MY_Controller extends CI_Controller
{
    public function _remap($method, $arguments = array())
    {
        $requestMethod = strtolower($this->input->server('REQUEST_METHOD'));

        if($method == 'index'){
            $callMethod = strtolower($requestMethod);
        }else{
            $callMethod = $requestMethod . ucfirst($method);
        }

        if(method_exists($this, $callMethod)){
            return call_user_func_array(array($this, $callMethod), $arguments);
        }
        
        throw new \BadMethodCallException("{$callMethod} does not exist!");
    }
}