MultipleIterator::valid Checks the validity of sub iterators &reftitle.description; public boolMultipleIterator::valid Checks the validity of sub iterators. &warn.undocumented.func; &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; Returns &true; if one or all sub iterators are valid depending on flags, otherwise &false; &reftitle.seealso; MultipleIterator::__construct