if (extension_loaded('mysql')) { $can_do = CModule::GetCanDo('mysql', 'add_user'); if ($can_do) { // Add new user to MySQL database } else { // Show error message that MySQL extension cannot add user } }In this example, the code checks if the MySQL extension is loaded and then checks if it can perform the operation of adding a new user to the database. Depending on the outcome, the code will proceed either with adding the user or showing an error message. The CModule::GetCanDo() method is part of the Bitrix Framework, a package library for PHP that provides a wide range of features and tools for website development.