Online PHP editor | output for ctO4R

<?php $tmp = json_decode(json_encode( (object) array('cars' => (object) array("1" => "one")) )); // expected $cars = array("1" => "one"); $cars = (array) $tmp->cars; var_dump(array_key_exists("1", $cars)); // expected true, returns false var_dump(array_key_exists(1, $cars)); // expected true, returns false $cars = get_object_vars($tmp->cars); var_dump($cars); var_dump(array_key_exists("1", $cars)); // expected true, returns true var_dump(array_key_exists(1, $cars)); // expected true, returns true