pg_fetch_object() and composite field names

Suppose I have a query like this: $query = "select A.id, B.id from foo A, bar B where A.bleh=B.blob;"; $result = pg_exec( $db, $query); $obj = pg_fetch_object( $result, 0 ); My question is: How do I access the field names in the $obj now? I know that I can transform the query to avoid this problem, or use a function other than pg_fetch_object. But I'm interested whether pg_fetch_object _can_ be used here. Many thanks, -- Arcady Genkin