Add namespace.

Util/AsciiSortedIterator.php

@@ -0,0 +1,18 @@
+<?php
+class AsciiSortedIterator extends SplHeap
+{
+    public function __construct(Iterator $iterator)
+    {
+        foreach ($iterator as $item) {
+            $this->insert($item);
+        }
+    }
+    public function compare($b,$a)
+    {
+        /**
+         * @var $a SplFileInfo
+         * @var $b SplFileInfo
+         */
+        return strcmp($a->getPath() . DIRECTORY_SEPARATOR . $a->getFileName(), $b->getPath() . DIRECTORY_SEPARATOR . $b->getFileName());
+    }
+}