A PHP internals mailing list thread discussing a PR to add COM_RESET_CONNECTION support in mysqlnd when reusing persistent database connections. The change ensures connections are reset to a blank-slate state (no lingering transactions or session variables) when reused across requests. The discussion covers minimum MySQL/MariaDB version requirements (5.7.3+ and 10.2+ respectively), whether an RFC is needed, whether to also implement a reset hook in PDO, and how to handle backward compatibility for users on older database versions. The thread concludes with the author drafting an RFC for minimum supported versions in PHP 8.6 and updating the PR to add a proper 'reset connection' hook at the PDO level rather than overloading the liveness check function.
