<?php
class Math {
const pi = 3.14;
}
class CircleMath extends Math {
public static function calculateArea($radius) {
return parent::pi * pow($radius, 2);
}
}
class Circle {
private $radius;
private $color;
private $coordinates;
public function __construct($radius = 1, $color = 'blue', $coordinates = array('x' => 0, 'y' => 0)) {
$this->radius = $radius;
$this->color = $color;
$this->coordinates = $coordinates;
}
public function calculateArea() {
return CircleMath::calculateArea($this->radius);
}
public function get_radius() {
return $this->radius;
}
public function get_color() {
return $this->color;
}
public function get_coordinates() {
return $this->coordinates;
}
}
$className = 'Circle';
$circle = new $className();
echo sprintf('The area of %s circle with radius %s and center positioned in (%s, %s) is: %s',
$circle->get_color(), $circle->get_radius(), $circle->get_coordinates()['x'],
$circle->get_coordinates()['y'], $circle->calculateArea());
$arguments = array();
echo $arguments[1];
?>