mongodb/mongo-php-driver — comment on commit cdb8c36e4de5c00940fcf79c0296c1a8ab31ed91
File:  line 0
By isidai:

This version of the resource stream function seems like a bug.
If you received multiple simultaneous connections, in order to use the HTTP RANGE, When you run, as specified in a conflict where there is "fseek" no seeking, response data is corrupted.
ex. "curl --range 0-123", "curl --range 123-456" when you receive a file with multiple connections.

This will probably have a PHP driver, connection pooling (persist connection function) and I suspect that due to the suspect but, is not known in detail.

sorry my english is not good.