Code analysis for adaptation such as PHP adapter mode

PHPAdapter pattern Code analysis for adaptation

<?php
// 适配器模式-类适配

/**
 * 需要被适配的类
 * 需求：给 Source 新增一个新的方法但又不修改 Source 的源代码
 */
class Source
{
	public function action() {
		echo &#39;call action&#39;, &#39;<br/>&#39;;
	}
}

interface Targetable
{
	/**
	 * Source 类中同名的方法
	 */
	function action();
	
	/**
	 * 需要给 Source 类新增的方法
	 */
	function action2();
}

/**
 * 适配器类
 */
class Adapter extends Source implements Targetable
{
	public function action2() {
		echo &#39;call <b>action2</b>&#39;, &#39;<br/>&#39;;
	}
}

// test code
$ad = new Adapter();
$ad->action();
$ad->action2();

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