class Point
{
    var $x, $y;
    
    function Point( $x, $y )
    {
        $this->x = $x;
        $this->y = $y;
    }
    
    //No accessors because we directly do it.
    
    function distance_from_origin()
    {
        return $this->distance_from_point( new Point(0,0) );
    }
    
    function distance_from_point( $p )
    {
       return sqrt( ($this->x - $p->x)*($this->x - $p->x) + ($this->y - $p->y)*($this->y - $p->y) );
    }
}

$a = new Point(3,4);
$b = new Point(11,10);

print $a->distance_from_origin() . "\n";
print $a->distance_from_point($b) . "\n";