Is it possible to use multiple prepared queries?

Question

PHP

Good day. I'm trying to use two prepared queries
$mysqli->prepare
To optimize the work with the database.
Unfortunately, an error is thrown

Commands out of sync; you can't run this command now

Actually - a subject. Is it possible to use two prepared queries, or only one at the most? Thank you.

Answer 1

Fulfilled the request - closed it, prepared another one - fulfilled it - closed it, and so on.
All the same, after all, they are sequentially executed