The wire version check is for the startAtOperationTime $changeStream option. Operation time itself is supported since MongoDB 3.6 (introduced with sessions and casual consistency).

Since consecutive calls to rewind() are NOPs, this must invoke next() to trigger a second resume. Additionally, leave a note about how this test might change with PHPLIB-448.

This extracts common logic in next() and rewind() to a new method, which is now also called by resume() after it rewinds the internal iterator.

Remove pre-3.0 compat code in FindAndModify