PDO: check for updated or inserted record using mysql INSERT ON DUPLICATE KEY UPDATE

Question

Using PDO / PHP and MySQL, how can I check if a record was inserted or updated when I use an INSERT ON DUPLICATE KEY UPDATE statement?

I have seen a solution using mysql_affected_rows() for PHP, but I am looking for a way I can use with PDO.

Answer 1

If you use PDO::exec() the return value will be 1 if the row has been inserted and 2 if the row has been updated.
If you're using a prepared statement and PDOStatement::execute() the same is true for PDOStement::rowCount()