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   1. drupal6
   2. drupal7

Fetches the menu link for the next page of the book.

Code

modules/book/book.module, line 576

<?php
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);
  }
}
?>