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<?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 radio %s and center pointer in (%s, %s) is: %s', $circle->get_color(), $circle->get_radio(), $circle->get_coordinates()['x'], $circle->get_coordinates()['y'], $circle->calculateArea()); ?>
Output for git.master, git.master_jit, rfc.property-hooks
The area of blue circle with radio 5 and center pointer in (0, 0) is: 78.5

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