PHPC-834 introduced new read and write command execute methods, which properly inherit client-level defaults for read and write concern. PHPLIB's Operation classes should be updated to use these.
Add Read, ReadWrite, and Write command execute methods
Support session option for GridFS operation methods
Support session option on all database operation methods
"Command does not support non local read concern" on findAndModify query on replicasets
Add Read, ReadWrite, and Write command execute methods to Database