{
$this->base = $base;
$this->height = $height;
}
# This might be different for each class of shape, because each Surface is calculated by a different formula ( St = b*h/2 and Sr = b*h)
public abstract function surface();
}
class Triangle extends Shape
{
# s = b*h/2
public function surface()
{
return round($this->base * $this->height / 2, 2);
}
}
class Rectangle extends Shape
{
# s = b*h
public function surface()
{
return round($this->base * $this->height, 2);
}
}
$r = new Rectangle();
$r->getValue(15, 3);
echo $r->surface() . "\n";
# echo 45
$t = new Triangle();
$t->getValue(15, 3);
echo $t->surface() . "\n";
# echo 22.5
