A CodeIgniter controller to enable dynamic AJAX access to models from views.

ajax.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Ajax extends CI_Controller {

	function __construct()
	{
		parent::__construct();
	}

	/**
	 * Dynamic AJAX access to models from views.
	 *
	 * In jQuery, can be used by:
	 *
	 * $.post('ajax/MODEL/METHOD', { arg1: val, arg2: val }, function(data) {
	 *     // Do something with returned data
	 * }, 'json');
	 *
	 **/
	function _remap($model, $params = array())
	{
		// Method will be first array item; we'll ignore the rest (if any).
		$method = array_shift($params);

		// Load the model requested. CI will throw a nice error for us if it doesn't exist.
		$this->load->model($model);

		// Call the model and method requested, and pass in any $_POST data that was sent.
		$output = call_user_func_array(array($this->$model, $method), $_POST);

		// 'echo' rather than 'return', as this is an AJAX controller, and encode as JSON
		echo json_encode($output);
	}
}

/* End of file ajax.php */
/* Location: ./application/controllers/ajax.php */