Error message

• Deprecated function: Array and string offset access syntax with curly braces is deprecated in include_once() (line 20 of /var/www/html/conference/celpe/includes/file.phar.inc).
• Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /var/www/html/conference/celpe/includes/common.inc).