UserSpice: Input.php - allow arrays and hashes

<?php
/*
UserSpice 4
An Open Source PHP User Management System
by the UserSpice Team at http://UserSpice.com

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
class Input {
    public static function exists($type = 'post'){
        switch ($type) {
            case 'post':
                return (!empty($_POST)) ? true : false;
                break;

            case 'get':
                return (!empty($_GET)) ? true : false;

            default:
                return false;
                break;
        }
    }

    public static function get($item){
        #echo "DEBUG: Input::get($item): Entering<br />\n";
        if (isset($_POST[$item])) {
            $myItem = $_POST[$item];
        } elseif(isset($_GET[$item])){
            $myItem = $_GET[$item];
        } else {
            return '';
        }
        #echo "DEBUG: Input::get($item): myItem=<pre>".print_r($myItem,true)."</pre><br />\n";
        /*
        If the item is an array, process each item independently, and return array of sanitized items.
        */
        if (is_array($myItem)){
            $myItems=array();
            foreach ($myItem as $k => $elem){
                $myItems[$k]=self::sanitize($elem);
            }
            #echo "DEBUG: Input::get($item): returning myItems=<pre>".print_r($myItems,true)."</pre><br />\n";
            return $myItems;
        }else{
            #echo "DEBUG: Input::get($item): returning myItem=$myItem<br />\n";
            return self::sanitize($myItem);
        }
    }

    public static function sanitize($string){
        return trim(htmlentities($string, ENT_QUOTES, 'UTF-8'));
    }
}