<?php require 'AreaCalculavel.php'; require 'Quadrado.php'; $q = new Quadrado(); $q->definirLado(4); echo $q->calculaArea();
<?php require 'AreaCalculavel.php'; require 'Quadrado.php'; require 'Circulo.php'; class Test { public function mostrarInformacoes(AreaCalculavel $figura) { $area = $figura->calculaArea(); echo "A area da figura eh " . $area; } } $q = new Quadrado(); $q->definirLado(20); $t = new Test(); $t->mostrarInformacoes($q);