Return type of CI_Session_files_driver::open($save_path, $name) should either be compatible with SessionHandlerInterface::open(string $path, string $name): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

ini_set(): Session ini settings cannot be changed after headers have already been sent

session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent

ini_set(): Session ini settings cannot be changed after headers have already been sent

ini_set(): Session ini settings cannot be changed after headers have already been sent

ini_set(): Session ini settings cannot be changed after headers have already been sent

ini_set(): Session ini settings cannot be changed after headers have already been sent

ini_set(): Session ini settings cannot be changed after headers have already been sent

ini_set(): Session ini settings cannot be changed after headers have already been sent

session_set_save_handler(): Session save handler cannot be changed after headers have already been sent

session_start(): Session cannot be started after headers have already been sent