Online PHP editor | output for fjqmG

<?php // Declara a interface 'iTemplate' interface iTemplate { public function setVariable($name, $var); public function getHtml($template); } // Implementa a interface // Isso funcionará class Template implements iTemplate { private $vars = array(); public function setVariable($name, $var) { $this->vars[$name] = $var; } public function getHtml($template) { } } // Isso NÃO funcionará // Fatal error: Class BadTemplate contains 1 abstract methods // and must therefore be declared abstract (iTemplate::getHtml) class BadTemplate extends Template implements iTemplate { private $vars = array('x' => 'o'); public function getHtml($template) { echo 'oi'; } } $o = new BadTemplate(); $o->getHtml("aa {x} "); ?>