Error message

• Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in book_prev() (line 775 of /data/www/icbo2018/modules/book/book.module).
• Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /data/www/icbo2018/includes/common.inc).