Re: [Request][Discussion] Introduce interfaces PDOInterface and PDOStatementInterface

That’s actually the thing that you can’t use PDO::ATTR_STATEMENT_CLASS with persistent PDO. To make it possible to have persistent PDO with custom PDOStatement you should have: 1) custom CustomPDO implements PDOInterface which will be somewhat proxy to PDO instance 2) custom CustomPDOStatement implements PDOStatementInterface which will be returned from CustomPDO::prepare and will have our additional logic + some stuff for persistence. And in our userland code we can have type hints like someMethod(PDOInterface $pdo) or someMethod(PDOStatementInterface $stmt) I hope it explains a bit how interfaces could help here. > On Jul 31, 2017, at 2:17 PM, Dan Ackroyd <danack@basereality.com> wrote: > > On 31 July 2017 at 08:21, Andrew Nester <newaltgroup@bk.ru> wrote: >> >> when we are using persistent PDO we can’t use PDO::ATTR_STATEMENT_CLASS and >> return our custom PDOStatement class >> >> But just implementing PDOInterface and PDOStatementInterface will allow us to implement >> this and have proper type hints in userland code. > > Are you sure having interfaces would change this? > > I would assume you can't use PDO::ATTR_STATEMENT_CLASS with persistent > PDO due to a limitation of the implementation internal to PDO, rather > than anything to do with what sub-classes what. > > Could you post a working example of being able to set > PDO::ATTR_STATEMENT_CLASS with persistent PDO? > > cheers > Dan