source: pro-violet-viettel/sourcecode/system/helpers/array_helper.php @ 765

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.1.6 or newer
 *
 * @package             CodeIgniter
 * @author              ExpressionEngine Dev Team
 * @copyright   Copyright (c) 2008 - 2011, EllisLab, Inc.
 * @license             http://codeigniter.com/user_guide/license.html
 * @link                http://codeigniter.com
 * @since               Version 1.0
 * @filesource
 */

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

/**
 * CodeIgniter Array Helpers
 *
 * @package             CodeIgniter
 * @subpackage  Helpers
 * @category    Helpers
 * @author              ExpressionEngine Dev Team
 * @link                http://codeigniter.com/user_guide/helpers/array_helper.html
 */

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

/**
 * Element
 *
 * Lets you determine whether an array index is set and whether it has a value.
 * If the element is empty it returns FALSE (or whatever you specify as the default value.)
 *
 * @access      public
 * @param       string
 * @param       array
 * @param       mixed
 * @return      mixed   depends on what the array contains
 */
if ( ! function_exists('element'))
{
        function element($item, $array, $default = FALSE)
        {
                if ( ! isset($array[$item]) OR $array[$item] == "")
                {
                        return $default;
                }

                return $array[$item];
        }
}

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

/**
 * Random Element - Takes an array as input and returns a random element
 *
 * @access      public
 * @param       array
 * @return      mixed   depends on what the array contains
 */
if ( ! function_exists('random_element'))
{
        function random_element($array)
        {
                if ( ! is_array($array))
                {
                        return $array;
                }

                return $array[array_rand($array)];
        }
}

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

/**
 * Elements
 *
 * Returns only the array items specified.  Will return a default value if
 * it is not set.
 *
 * @access      public
 * @param       array
 * @param       array
 * @param       mixed
 * @return      mixed   depends on what the array contains
 */
if ( ! function_exists('elements'))
{
        function elements($items, $array, $default = FALSE)
        {
                $return = array();
                
                if ( ! is_array($items))
                {
                        $items = array($items);
                }
                
                foreach ($items as $item)
                {
                        if (isset($array[$item]))
                        {
                                $return[$item] = $array[$item];
                        }
                        else
                        {
                                $return[$item] = $default;
                        }
                }

                return $return;
        }
}

/* End of file array_helper.php */
/* Location: ./system/helpers/array_helper.php */