<?php
class Math {
const pi = 3.14;
}
class CircleMath extends Math {
public static function calculateArea($radio) {
return parent::pi * pow($radio, 2);
}
}
class Circle {
private $radio;
private $color;
private $coordinates;
public function __construct($radio, $color = 'blue', $coordinates = array('x' => 0, 'y' => 0)) {
$this->radio = $radio;
$this->color = $color;
$this->coordinates = $coordinates;
}
public function calculateArea() {
return CircleMath::calculateArea($this->radio);
}
public function get_radio() {
return $this->radio;
}
public function get_color() {
return $this->color;
}
public function get_coordinates() {
return $this->coordinates;
}
}
$className = 'Circle';
$circle = new $className(5);
echo sprintf('The area of %s circle with radius %s and center positioned in (%s, %s) is: %s',
$circle->get_color(), $circle->get_radio(), $circle->get_coordinates()['x'],
$circle->get_coordinates()['y'], $circle->calculateArea());
?>