Fatal error: Class CI_Session_files_driver contains 1 abstract method

Fatal error: Class CI_Session_files_driver contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (SessionHandlerInterface::open) in C:xampphtdocscmms2systemlibrariesSessiondriversSession_files_driver.php on line 49

this error keeps on showing up while i’m working on my localhost xampp web app projec. I’m using codeigniter by the way. What do you think is the reason this shows up? These are the only codes that I’ve done with session.

  $this->session->set_userdata($data);
    $autoload['libraries'] = array('database','session');
    $config['sess_driver'] = 'files';
    $config['sess_cookie_name'] = 'ci_session';
    $config['sess_expiration'] = 7200;
    $config['sess_save_path'] = sys_get_temp_dir();
    $config['sess_match_ip'] = FALSE;
    $config['sess_time_to_update'] = 300;
    $config['sess_regenerate_destroy'] = FALSE;

Answer

Please restart apache server if not working then download CodeIgniter again and replace your system/ directory with a fresh one.

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Answer