book_next($book_link)
drupal/modules/book/book.module, line 645
Fetches the menu link for the next page of the book.
function book_next($book_link) {
$flat = book_get_flat_menu($book_link);
// Assigning the array to $flat resets the array pointer for use with each().
do {
list($key, $curr) = each($flat);
}
while ($key && $key != $book_link['mlid']);
if ($key == $book_link['mlid']) {
return current($flat);
}
}