Insert or update if key exists

[eluser]Bramme[/eluser]
And I've solved it myself (don't mind if I double-post it here, for future reference):

After reading the docs again, more carefully, I realised that the query has to be:

INSERT INTO table (option_a, option_b, account_id) VALUES (‘val1’, ‘val2’, $id) ON DUPLICATE KEY UPDATE option_a = 'val1', option_b = 'val2'