abstract：
class Mp3
{
public function music()
{
return '可以放音乐';
}
}
class Mp4
{
public function vedio()
{
return '可以放视频';
}
}
class Factory
{
public static function cerate($className)
{
switch ($className) {
case 'Mp3':
return new Mp3;
break;
case 'Mp4':
return new Mp4;
break;
}
}
}
class student
{
public function play()
{
$Mp3 = Factory ::cerate('Mp3');
return 'Mp3'.$Mp3->music();
}
public function play2()
{
$Mp4 = Factory ::cerate('Mp4');
return 'Mp4'.$Mp4->vedio();
}
}
$student = new student;
echo $student->play();
echo "
";echo $student->play2();
