// Set success message $this->session->set_flashdata('success', 'Form submitted successfully!');
// Set error message $this->session->set_flashdata('error', 'There were errors in the form. Please try again.');
// Set warning message $this->session->set_flashdata('warning', 'Please review your account information.');Overall, the set_message method is a useful tool for displaying feedback to the user. It is often used in conjunction with templates in PHP and can be found in various package libraries, such as CodeIgniter.