--TEST-- Bug #31720 (Invalid object callbacks not caught in array_walk()) --FILE-- <?php $array = array('at least one element'); array_walk($array, array($nonesuchvar,'show')); ?> ===DONE=== --EXPECTF-- Notice: Undefined variable: nonesuchvar in %s on line %d Warning: array_walk() expects parameter 2 to be a valid callback, first array member is not a valid class name or object in %s on line %d ===DONE===