SplObjectStorage::key Returns the index at which the iterator currently is &reftitle.description; public intSplObjectStorage::key Returns the index at which the iterator currently is. &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; The index corresponding to the position of the iterator. &reftitle.examples; attach($o1, "d1"); $s->attach($o2, "d2"); $s->rewind(); while($s->valid()) { $index = $s->key(); $object = $s->current(); // similar to current($s) var_dump($index); var_dump($object); $s->next(); } ?> ]]> &example.outputs.similar; &reftitle.seealso; SplObjectStorage::rewind SplObjectStorage::current SplObjectStorage::next SplObjectStorage::valid