more real example

Adapter/ElecBookAdapter.php

@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * DesignPatternPHP
+ */
+
+namespace DesignPatterns\Adapter;
+
+/**
+ * ElecBookAdapter is an adapter to fit an e-book like a paper book
+ * 
+ * This is the adapter here. Notice it implemennts PaperBookInterface,
+ * therefore you don't have to change the code of the client which using paper book.
+ */
+class ElecBookAdapter implements PaperBookInterface
+{
+
+    protected $eBook;
+
+    /**
+     * Notice the constructor, it "wraps" an electronic book
+     */
+    public function __construct(ElecBookInterface $ebook)
+    {
+        $this->eBook = $ebook;
+    }
+
+    /**
+     * This cass makes the proper translation from one interface to another
+     */
+    public function open()
+    {
+        $this->eBook->pressStart();
+    }
+
+    public function turnPage()
+    {
+        $this->eBook->pressNext();
+    }
+
+}