MultipleIterator::key Gets the registered iterator instances &reftitle.description; public arrayMultipleIterator::key Get the registered iterator instances key() result. &warn.undocumented.func; &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; An array of all registered iterator instances, or &false; if no sub iterator is attached. &reftitle.errors; A LogicException if mode MIT_NEED_ALL is set, and at least one attached iterator is not valid. Calling this method from triggers warning "Illegal type returned". &reftitle.seealso; MultipleIterator::current