MY_Controller.php

<?php if( ! defined('BASEPATH') ) exit('No direct script access allowed');
/**
 * CodeIgniter 2.1.0 form validation external callbacks.
 *
 * This is part of MY_Controller.php in Community Auth, which is an open 
 * source authentication application for CodeIgniter 2.1.0
 *
 * @package     Community Auth
 * @author      Robert B Gottier
 * @copyright   Copyright (c) 2011, Robert B Gottier.
 * @license     BSD - http://http://www.opensource.org/licenses/BSD-3-Clause
 * @link        http://community-auth.com
 */

class MY_Controller extends CI_Controller
{
	// --------------------------------------------------------------

	/**
	 * Generic callback used to call callback methods for form validation.
	 * 
	 * @param string
	 *        - the value to be validated
	 * @param string
	 *        - a comma separated string that contains the model name, method name
	 *          and any optional values to send to the method as a single parameter.
	 *          First value is the name of the model.
	 *          Second value is the name of the method.
	 *          Any additional values are values to be send in an array to the method. 
	 *
	 *      EXAMPLE RULE:
	 *  callback_external_callbacks[some_model,some_method,some_string,another_string]
	 */
	public function external_callbacks( $postdata, $param )
	{
		$param_values = explode( ',', $param ); 

		// Make sure the model is loaded
		$model = $param_values[0];
		$this->load->model( $model );

		// Rename the second element in the array for easy usage
		$method = $param_values[1];

		// Check to see if there are any additional values to send as an array
		if( count( $param_values ) > 2 )
		{
			// Remove the first two elements in the param_values array
			array_shift( $param_values );
			array_shift( $param_values );

			$argument = $param_values;
		}

		// Do the actual validation in the external callback
		if( isset( $argument ) )
		{
			$callback_result = $this->$model->$method( $postdata, $argument );
		}
		else
		{
			$callback_result = $this->$model->$method( $postdata );
		}

		return $callback_result;
	}
	
	// --------------------------------------------------------------

}

/* End of file MY_Controller.php */
/* Location: /application/libraries/MY_Controller.php */