Question

I found the mysql_insert_id function to retrieve the last auto generated ID.

Should I be using mysql_insert_id +1 to add a new ID or is there a call for adding a new unique ID?

Answer 1

Using NULL for id:

INSERT INTO  `database`.`table` (`id`, `user`, `result`) VALUES (NULL, 'Alice', 'green')");

OR not specifying id at all:

INSERT INTO  `database`.`table` (`user`, `result`) VALUES ('Alice', 'green')");

Either way works just fine, more of a preference but personally I chose the second as its less typing.