Brian Swan's Blog: PHP Driver for SQL Server - Request for Feature Feedback
I want to make sure that his request gets in front of lots of eyes, so I'm re-posting his request here (below). Jonathan included some links in his post so you can learn more about what the team is considering for the next release of the driver, but he didn't elaborate on "Buffered Queries".
They suggest a few features and ask for choices on which would be the most important to you as a developer - Always On support, SQL Server Serverless Express support, Buffered queries and LOB streaming support in PDO_SQLSRV. To give feedback, send an email to the address mentioned in the post or on twitter/their forums.