var_dump($this->tracks);
}
}
class CD extends baseCD
{
public $type = 'cd';
}
//增强型CD类， 与标准CD的唯一不同是写至CD的第一个track是数据track("DATA TRACK")
class enhadcedCD extends baseCD
{
public $type = 'enhadced';
}
//CD工厂类，实现对以上两个类具体实例化操作
class CDFactory
{
public static function create($type)
{
$class = strtolower($type) . "CD";
return new $class();
}
}
//实例操作
$type = "enhadced";
$objCd = CDFactory::create($type);
$tracksFromExternalSource = array("What It Means", "Brr", "Goodbye");
$objCd->setBand("Never Again");
$objCd->setTitle("Waste of a Rib");
foreach ($tracksFromExternalSource as $track) {
$objCd->addTrack($track);
}
$objCd->printTrack();
$this->tracks[] = 'DATA TRACK';
}
public function setTitle($title)
{
$this->title = $title;
}
public function setBand($band)
{
$this->band = $band;
}
public function addTrack($track)
{
$this->tracks[] = $track;
}
}
class CDFactory
{
public static function create($type)
{
$class = strtolower($type) . "CD";
return new $class();
}
}
$type = 'enhanced';
$cd = CDFactory::create($type);
$cd->setBand($band);
$cd->setTitle($title);
foreach ($tracksFromExternalSource as $track) {
$cd->addTrack($track);
}
print_r($cd);