[Summary view]

   1  <?php
   2  /**
   3   * Simple class for using an array as a stack.
   4   *
   5   * Copyright 2008-2017 Horde LLC (http://www.horde.org/)
   6   *
   7   * @category   Horde
   8   * @package    Support
   9   * @license    http://www.horde.org/licenses/bsd
  10   */
  11  class Horde_Support_Stack
  12  {
  13      /**
  14       * @var array
  15       */
  16      protected $_stack = array();
  17  
  18      public function __construct($stack = array())
  19      {
  20          $this->_stack = $stack;
  21      }
  22  
  23      public function push($value)
  24      {
  25          $this->_stack[] = $value;
  26      }
  27  
  28      public function pop()
  29      {
  30          return array_pop($this->_stack);
  31      }
  32  
  33      public function peek($offset = 1)
  34      {
  35          if (isset($this->_stack[count($this->_stack) - $offset])) {
  36              return $this->_stack[count($this->_stack) - $offset];
  37          } else {
  38              return null;
  39          }
  40      }
  41  }