Error message

• Notice: Undefined index: base_url in include_once() (line 125 of /home3/occupyco/public_html/dev/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 145 of /home3/occupyco/public_html/dev/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 146 of /home3/occupyco/public_html/dev/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 154 of /home3/occupyco/public_html/dev/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 161 of /home3/occupyco/public_html/dev/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_settings_initialize() (line 819 of /home3/occupyco/public_html/dev/includes/bootstrap.inc).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_settings_initialize() (line 828 of /home3/occupyco/public_html/dev/includes/bootstrap.inc).
• Warning: session_name(): Cannot change session name when headers already sent in drupal_settings_initialize() (line 831 of /home3/occupyco/public_html/dev/includes/bootstrap.inc).