In PHP, when using PDO with pgSQL how to get the value of "RETURNING" clause in the original INSERT sql query

In PHP, I am using PDO with the pgSQL drivers. I wanted to know how to get the value of the "RETURNING" clause given in the INSERT sql query. My current code looks like this, ``` $query = 'INSERT INTO "TEST" (firstname, lastname) VALUES ('John', 'Doe') RETURNING user_id'; $queryHandle = $connection->prepare($query); $queryHandle->execute(); ``` Obviously $queryHandle->execute(); returns TRUE or FALSE. But I wanted to get the value of "user_id" if the insert was successful. Can you guys give me a pointer as to how to go about it? Thanks.