<?php
class Box {
protected $_length;
protected $_width;
protected $_height;
public function __construct($length, $width, $height) {
$this->_length = $length;
$this->_width = $width;
$this->_height = $height;
}
public function volume() {
return $this->_length * $this->_width * $this->_height;
}
}
$myBox = new Box(20,10, 5);
$myVolume = $myBox->volume();
echo("Volume = " . $myVolume . "<br/>");
class Parcel extends Box {
private $_deliveryAddress;
private $_weight;
public function __construct($length, $width, $height, $deliveryAddress, $weight) {
parent::__construct($length, $width, $height);
$this->_deliveryAddress = $deliveryAddress;
$this->_weight = $weight;
}
public function cost() {
$volume = $this->volume();
if ($volume <= 200)
{
return 5;
}
else
{
return 10;
}
}
}
$myParcel = new Parcel(20,10, 5, '10 Bristol Road', '210');
$myCost = $myParcel->cost();
$myVolume = $myBox->volume();
echo("Volume = " . $myVolume . " Cost = " . $myCost . "<br/>");
?>
