how to update database table when session expired in codeigniter

问题

I'm new in PHP and Codeigniter, by the way how to update database table when session in CI is expired and where I can put the code? I use uniqid in database, it's called token. here is my login tableusername, password, level, token, last_login, exp_time. and I want to change value token=null when session in Codeigniter is expired.

回答1:

To do this you have to you have to extend CI_Session

Create a php file inside application/core/MY_Session.php

class MY_Session extends CI_Session {

public function __construct() {
    parent::__construct();
}

function sess_destroy() {

    //write your update here 
    $this->CI->db->update('YOUR_TABLE', array('YOUR_DATA'), array('YOUR_CONDITION'));

    //call the parent 
    parent::sess_destroy();
}

}

But it might not always work because your cookie might get expire so CI will not able to get your current session

来源：https://stackoverflow.com/questions/21908953/how-to-update-database-table-when-session-expired-in-codeigniter