Untitled

<html>
<body>
</php

abstract class Shape {

private $x=0;
private $y=0;
private $z=0;

public abstract function volume(){
}

}
class rectangular extends shape {

function __construct ($x,$y,$z){
$this->x= $x;
$this->y= $y;
$this->z= $z;
}
function volume(){
volume=$this->x*$this->y*$this->z;
return volume;
}
}
class cube extends shape {

function __construct ($x){
$this->x= $x;
}
function volume(){
volume=$this->x*$this->x*$this->x;
return volume;
}
}
class sphere extends shape {

function __construct($x){
$this->x= $x;
}
function volume(){
volume=4/3*pi()*$this->x*$this->x*$this->x;
return volume;
}
}
$shape =array(
new rectangular(3,5,6),
new cube(4),
new sphere(8)
);

foreach ($shape as $shape1){
echo $shape1-> volume(). "\n";
}

?>