设计模式4.1-工厂模式之简单工厂

<?php

/*
*
*
*
* 简单工厂模式：创建对象的逻辑抽取出来，放到工厂中实现
*
* 在本示例中：客户类Test获取对象实例door的代码放到工厂类Factory中实现。
* 带来的好处是，在我们需要添加door的类型时，不必更改Test类的代码，只需要在factory中添加即可。
*
*/
//对象类
abstract class Door
{
abstract public function open();
abstract public function close();
}

class WhiteDoor extends Door
{
public function open()
{
echo "White Door Open!<br>\n";
}

public function close()
{
echo "White Door Close!<br>\n";
}
}
class BlackDoor extends Door
{
public function open()
{
echo "Black Door Open!<br>\n";
}

public function close()
{
echo "Black Door Close!<br>\n";
}
}

class NilDoor extends Door
{
public function open()
{}

public function close()
{}
}

class SimpleFactory
{
public function create($config = [])
{
$object = null;

if (is_array($config) && !empty($config)) {
$className = array_shift($config).'Door';
$object = new $className($config);
} else {
$object = new NilDoor();
}
return $object;
}
}

class Test
{
public function run()
{
$factory = new SimpleFactory();

$doorOne = $factory->create(['Black']);
$doorTwo = $factory->create(['White']);

$doorOne->open();
$doorOne->close();

$doorTwo->open();
$doorTwo->close();
}
}

$test = new Test();
$test->run();