Online PHP editor | refs for 5eEWn

<?php ///on php version < 8.4 class Foo { private $data = null; public function issetData(){ return $this->data !== null; } public function setData($data){ $this->data = $data; } } $foo = new Foo(); var_dump($foo->issetData()); $foo->setData(123); var_dump($foo->issetData());