Hello John and thank you for posting.
Please make sure that your plugin function declaration is:
Code:
onQuizCompleted(&$quiz, &$user_id, &$quiz_type, &$score)
(note the ampersands)
These arguments must be passed by reference, which means that you should give the function access to the original variable in order to be able to make changes in it, rather than just passing its value, which means you can't affect the original variable of the quiz.
In older PHP versions, this was required in both sides of the function (both in the declaration and the function call) but now it's only required in the function declaration.
Thanks again.
