[클래스] __construct 조상클래스의 생성자

// 조상 클래스의 생성자

class Point {

var $x, $y;

function __construct($x, $y) {

$this->x = $x;

$this->y = $y;

}

}

class Point3D extends Point {

var $z;

function __construct($x, $y, $z) {

parent::__construct($x, $y);

$this->z = $z;

}

public function getLocation() {

return 'x :' . $this->x . ', y :' . $this->y . ', z :' . $this->z;

}

}

$p3 = new Point3D(100,200,300);

echo $p3->getLocation();