more real example

Adapter/Book.php

@@ -0,0 +1,25 @@
+<?php
+
+/*
+ * DesignPatternPHP
+ */
+
+namespace DesignPatterns\Adapter;
+
+/**
+ * Book is a concrete and standard paper book
+ */
+class Book implements PaperBookInterface
+{
+
+    public function open()
+    {
+        
+    }
+
+    public function turnPage()
+    {
+        
+    }
+
+}