Error message

• Notice: Trying to access array offset on value of type int in element_children() (line 6488 of /data03/warwicki/public_html/includes/common.inc).
• Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /data03/warwicki/public_html/includes/common.inc).
• Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in _menu_load_objects() (line 569 of /data03/warwicki/public_html/includes/menu.inc).