Add missing files

Author: helly25

ext/spl/examples/directorygraphiterator.inc

@@ -0,0 +1,11 @@
+<?php
+
+class DirectoryGraphIterator extends DirectoryTreeIterator
+{
+	function __construct($path)
+	{
+		RecursiveIteratorIterator::__construct(new CachingRecursiveIterator(new ParentIterator(new RecursiveDirectoryIterator($path)), true), 1);
+	}
+}
+
+?>

ext/spl/examples/parentiterator.inc

@@ -0,0 +1,21 @@
+<?php
+
+class ParentIterator extends FilterIterator implements RecursiveIterator
+{
+	function accept()
+	{
+		return $this->it->hasChildren();
+	}
+
+	function hasChildren()
+	{
+		return $this->it->hasChildren();
+	}
+
+	function getChildren()
+	{
+		return new ParentIterator($this->it->getChildren());
+	}
+}
+
+?>