1: <?php
 2: /**
 3:  * From Binary XML Content Format Specification Version 1.3, 25 July 2001
 4:  * found at http://www.wapforum.org
 5:  *
 6:  * Copyright 2003-2012 Horde LLC (http://www.horde.org/)
 7:  *
 8:  * See the enclosed file COPYING for license information (LGPL). If you
 9:  * did not receive this file, see http://www.horde.org/licenses/lgpl21.
10:  *
11:  * @author  Anthony Mills <amills@pyramid6.com>
12:  * @package Xml_Wbxml
13:  */
14: class Horde_Xml_Wbxml_LifoQueue
15: {
16:     protected $_queue = array();
17: 
18:     public function push($obj)
19:     {
20:         $this->_queue[] = $obj;
21:     }
22: 
23:     public function pop()
24:     {
25:         if (count($this->_queue)) {
26:             return array_pop($this->_queue);
27:         } else {
28:             return null;
29:         }
30:     }
31: 
32:     public function top()
33:     {
34:         if ($count = count($this->_queue)) {
35:             return $this->_queue[$count - 1];
36:         } else {
37:             return null;
38:         }
39:     }
40: }
41: