Quiz

In the file /mod/quiz/questiontypes/multichoice/questiontype.php find the line "$qnumchar = chr(ord('a') + $key);" and replace it with "$qnumchar = multichoice_safe_chr($key);". Additionally define the function multichoice_safe_chr at the bottom of this file (before '?>'). A possible function could look like this:

function multichoice_safe_chr($num) {
$returnvalue = '';
if ($num > 25) {
$newnum = (($num - ($num % 26)) / 26) - 1;
$returnvalue .= multichoice_safe_chr($newnum);
}
$returnvalue .= chr(ord('a') + ($num % 26));
return $returnvalue;
}

The above will continue with 'aa', 'ab', ... after 'z'.

Julian