COption::SetOptionString('my.module', 'option_name', 'option_value');
$value = COption::GetOptionString('my.module', 'option_name', 'default_value');
COption::RemoveOption('my.module', 'option_name');This removes the "option_name" option for the "my.module" module. Overall, the COption class is part of the Bitrix framework package library.