Error message

• Deprecated function: Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in require_once() (line 341 of /www/p/o/u33286/public_html/includes/module.inc).
• Deprecated function: Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in require_once() (line 341 of /www/p/o/u33286/public_html/includes/module.inc).
• Notice: Trying to access array offset on value of type null in forum_get_topics() (line 926 of /www/p/o/u33286/public_html/modules/forum/forum.module).
• Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /www/p/o/u33286/public_html/includes/common.inc).