Description:
------------
Currently PDO connects when an instance is created `new PDO(....);` will connect to the database at the point the PDO object is created.

For performance reasons sometimes this is not required and due to the way a lot of frameworks work, will mean connecting even if a query is never made.

To overcome this, PDO is often wrapped in a class which connects at the point a query (or prepare, or other database requiring function is called. See http://stackoverflow.com/questions/23595609/is-this-how-lazy-connecting-of-a-database-connection-is-supposed-to-be and http://stackoverflow.com/questions/5484790/auto-connecting-to-pdo-only-if-needed

It would be better if PDO supported lazy connection as an option when the object is instantiated, for example:


<?php
 $dbh = new PDO($dsn, $user, $password, PDO::LAZY_CONNECT);
?>


Which would only connect to the database server when query(), prepare() or other similar functions are called.