PDO fetchAll() primary key as array group key

Question

I want to store the contents of a specific database into an array, grouped by their primary keys. (Instead of the useless way PDO fetchAll() organises them).

My curr

Answer 1

I'd like to point out the only solution that works for me:

fetchAll(\PDO::FETCH_GROUP|\PDO::FETCH_UNIQUE|\PDO::FETCH_ASSOC);

Beware that this will strip the first column from the resultset. So the query must be:

SELECT id_keyname AS arrkey, id_keyname, .... FROM ...