<?php require_once "rectangle.php"; require_once "square.php"; $squr = new Square(10, 30); $area = $squr->equalarea() . " sq."; echo $area . PHP_EOL; $perimeter = $squr->perimeter() . " long."; echo $perimeter . PHP_EOL; $rect = new Rectangle(10, 30); $area = $rect->area() . " sq."; echo $area . PHP_EOL; $perimeter = $rect->perimeter() . " long."; echo $perimeter . PHP_EOL;