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Signed-off-by: j502647092 <jtb1@163.com>

ThinkPHP/Library/Org/Util/Stack.class.php

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+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+namespace Org\Util;
+
+/**
+ * Stack实现类
+ * @category   ORG
+ * @package  ORG
+ * @subpackage  Util
+ * @author    liu21st <liu21st@gmail.com>
+ */
+class Stack extends ArrayList {
+
+    /**
+     * 架构函数
+     * @access public
+     * @param array $values  初始化数组元素
+     */
+    public function __construct($values = array()) {
+        parent::__construct($values);
+    }
+
+    /**
+     * 将堆栈的内部指针指向第一个单元
+     * @access public
+     * @return mixed
+     */
+    public function peek() {
+        return reset($this->toArray());
+    }
+
+    /**
+     * 元素进栈
+     * @access public
+     * @param mixed $value
+     * @return mixed
+     */
+    public function push($value) {
+        $this->add($value);
+        return $value;
+    }
+
+}