116 lines
3.4 KiB
PHP
116 lines
3.4 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014 - 2019, British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.0.0
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* @filesource
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*/
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* CodeIgniter Array Helpers
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*
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* @package CodeIgniter
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* @subpackage Helpers
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* @category Helpers
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/helpers/array_helper.html
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*/
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// ------------------------------------------------------------------------
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if ( ! function_exists('element'))
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{
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/**
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* Element
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*
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* Lets you determine whether an array index is set and whether it has a value.
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* If the element is empty it returns NULL (or whatever you specify as the default value.)
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*
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* @param string
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* @param array
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* @param mixed
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* @return mixed depends on what the array contains
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*/
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function element($item, array $array, $default = NULL)
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{
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return array_key_exists($item, $array) ? $array[$item] : $default;
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}
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}
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// ------------------------------------------------------------------------
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if ( ! function_exists('random_element'))
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{
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/**
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* Random Element - Takes an array as input and returns a random element
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*
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* @param array
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* @return mixed depends on what the array contains
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*/
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function random_element($array)
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{
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return is_array($array) ? $array[array_rand($array)] : $array;
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}
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}
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// --------------------------------------------------------------------
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if ( ! function_exists('elements'))
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{
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/**
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* Elements
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*
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* Returns only the array items specified. Will return a default value if
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* it is not set.
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*
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* @param array
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* @param array
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* @param mixed
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* @return mixed depends on what the array contains
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*/
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function elements($items, array $array, $default = NULL)
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{
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$return = array();
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is_array($items) OR $items = array($items);
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foreach ($items as $item)
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{
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$return[$item] = array_key_exists($item, $array) ? $array[$item] : $default;
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}
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return $return;
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}
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}
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