Propel::close();
public function logout() { // perform user logout // ... // close Propel connection Propel::close(); }In this example, we call the "logout" method when a user logs out of the system. At the end of the method, we explicitly call the Propel::close() method to close the connection. In conclusion, the "close" method is a handy package in the Propel library, used to close database connections explicitly. It helps developers avoid the overhead of keeping unused connections alive, which can lead to performance issues.