A simple example of interface adaptation in PHP adapter mode

PHPAdapter patternInterfaceSimple example of adaptation

<?php
// 适配器模式-接口适配

/**
 * 问题：实现此接口的类需要实现所有的方法，但是实际使用的仅仅是其中的某一个方法而已，比较繁琐
 * 解决方法：增加一个中间类，对所有的方法空实现，然后不再直接实现接口而是继承这个中间类
 * 这就是 接口适配.
 */
interface Sourceable
{
	function action1();
	function action2();
	function action3();
}

/**
 * 中间类, 所有方法空实现
 */
abstract class AbstractAdapter implements Sourceable
{
	public function action1() { }
	public function action2() { }
	public function action3() { }
}

class Adapter extends AbstractAdapter
{
	public function action2() {
		echo &#39;call <b>action2</b>&#39;, &#39;<br/>&#39;;
	}
}

class Adapter2 extends AbstractAdapter
{
	public function action3() {
		echo &#39;call <b>action3</b>&#39;, &#39;<br/>&#39;;
	}
}

// test code
$a1 = new Adapter();
$a1->action2();

$a2 = new Adapter2();
$a2->action3();

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