<?php

/**

 * CodeIgniter

 *

 * An open source application development framework for PHP

 *

 * This content is released under the MIT License (MIT)

 *

 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 *

 * @package	CodeIgniter

 * @author	EllisLab Dev Team

 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)

 * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)

 * @license	http://opensource.org/licenses/MIT	MIT License

 * @link	https://codeigniter.com

 * @since	Version 1.0.0

 * @filesource

 */

defined('BASEPATH') OR exit('No direct script access allowed');



/**

 * CodeIgniter Array Helpers

 *

 * @package		CodeIgniter

 * @subpackage	Helpers

 * @category	Helpers

 * @author		EllisLab Dev Team

 * @link		https://codeigniter.com/user_guide/helpers/array_helper.html

 */



// ------------------------------------------------------------------------



if ( ! function_exists('element'))

{

	/**

	 * Element

	 *

	 * Lets you determine whether an array index is set and whether it has a value.

	 * If the element is empty it returns NULL (or whatever you specify as the default value.)

	 *

	 * @param	string

	 * @param	array

	 * @param	mixed

	 * @return	mixed	depends on what the array contains

	 */

	function element($item, array $array, $default = NULL)

	{

		return array_key_exists($item, $array) ? $array[$item] : $default;

	}

}



// ------------------------------------------------------------------------



if ( ! function_exists('random_element'))

{

	/**

	 * Random Element - Takes an array as input and returns a random element

	 *

	 * @param	array

	 * @return	mixed	depends on what the array contains

	 */

	function random_element($array)

	{

		return is_array($array) ? $array[array_rand($array)] : $array;

	}

}



// --------------------------------------------------------------------



if ( ! function_exists('elements'))

{

	/**

	 * Elements

	 *

	 * Returns only the array items specified. Will return a default value if

	 * it is not set.

	 *

	 * @param	array

	 * @param	array

	 * @param	mixed

	 * @return	mixed	depends on what the array contains

	 */

	function elements($items, array $array, $default = NULL)

	{

		$return = array();



		is_array($items) OR $items = array($items);



		foreach ($items as $item)

		{

			$return[$item] = array_key_exists($item, $array) ? $array[$item] : $default;

		}



		return $return;

	}

}

