Question on Persistent PDO Connections

Is there a way of knowing if the call to new PDO(yada) either reused a 
connection or created a new one? I want to create a couple of temp tables 
and temp triggers but don't want to have to do this everytime, only when a 
NEW connection is made. I suppose I could just use "IF NOT EXISTS" in the 
SQL, but I would rather not have to issue anything on a reuse situation. Any 
thoughts/help is appreciated.

Kevin