Answers for "prevent session never close codeigniter 3"

destroy session codeigniter 3

# CI 3

# for spesific session
$this->session->unset_userdata('some_name');

# for all session
$this->session->sess_destroy();

how to prevent application from session hijacking in codeigniter

By using $this->security->xss_clean() you can prevent session hijacking / xss