Actualización

vendor/zendframework/zend-stdlib/src/ArrayStack.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Stdlib;
+
+use ArrayIterator;
+use ArrayObject as PhpArrayObject;
+
+/**
+ * ArrayObject that acts as a stack with regards to iteration
+ */
+class ArrayStack extends PhpArrayObject
+{
+    /**
+     * Retrieve iterator
+     *
+     * Retrieve an array copy of the object, reverse its order, and return an
+     * ArrayIterator with that reversed array.
+     *
+     * @return ArrayIterator
+     */
+    public function getIterator()
+    {
+        $array = $this->getArrayCopy();
+        return new ArrayIterator(array_reverse($array));
+    }
+}