Online PHP editor | output for Tj0GH

<?php class Foo { public $bar; public $baz; public $taz; } // please note that this API has a signature of `object $object` - any object allowed. function unsetProperties($object) { // we ignore inheritance and private properties for simplicity return array_diff( array_map( function (\ReflectionProperty $p) : string { return $p->getName(); }, (new ReflectionClass($object))->getProperties() ), array_keys((array) $object) ); } var_dump(unsetProperties(new Foo)); $foo = new Foo; unset($foo->baz); var_dump(unsetProperties($foo));