Online PHP editor | refs for hTtvr

<?php class cls { protected $active = 'false'; public function __construct() { $this->active = 'active'; } public function activate() { $this->active = 'active'; } public function deactivate() { $this->active = 'inactive'; } public function isActive() { return $this->active === 'active'; } public function __toString() { return sprintf('<li class="%s"></li>', $this->active); } } echo new cls;