mongodb/mongo-php-driver — comment on commit 59f97da57bc81f2d3ae91d3690ee7a1ab9c18c28
File:  line 0
By hacklschorsch:

Hi Derick! Please run the test without Matt's patch; I believe it will still work (and that Matt did something wrong in using sparse indexes). My own unit test did (https://github.com/hacklschorsch/mongo-php-driver/commit/054120a9edcd8a48a4a44856f51ef85cb9e5b576). Matt's code is broken, as he says himself BTW. Please see the mailing list eMail on that.

Florian