class Human{
private $height;
}
class Player extends Human {
protected $age;
function __construct($name,$height){
$this->name = $name;
$this->height = $height;
}
}
$joden=new Player('joden','25');
echo $joden->height;
Play的构造方法中这句代码:
$this->height = $height;
相当于给player增加了一个height属性...
class Human{
private $height;
public function setHeight($h){
$this->height=$h;
}
public function printHeight(){
echo "Human height:".$this->height;
}
}
class Player extends Human {
protected $age;
function __construct($name,$height){
$this->name = $name;
$this->height = $height;
}
}
$joden=new Player('joden','25');
echo 'Player Heihgt:'.$joden->height;
echo '<br>';
echo '调用 Human 方法设置Human 的私有height:<br>';
echo $joden->setHeight(30);
echo $joden->printHeight();
echo '<br>';
echo '再次打印Player的Heihgt:'.$joden->height;