Following function declaration generates syntax error:

/**

• Array of names of quizzes a category (and optionally its childs) appears in

*

• @return array Array of quiz names (with quiz->id as array keys)

• @param integer Quiz category id

• @param boolean Examine category childs recursively

• @param array Array of categories (id) to exclude

*/

function quizzes_category_used($id, $recursive=false, &$excluded = array()) {

(currently line 2504)

You can't do that! The optional parameter is a pass-by-reference, that won't work. Not sure what was intended though!