How to build in 'maintenance mode' in Codeigniter?

Question

I\'m using latest codeigniter and I need to create a flag (ideally in the config) when turned to \'true\', all pages display a \'maintenance mode\' message instead of execut

Answer 1

this one works well,

application/views/vw_maintenance.php

    
    
      
        
        
      
      
        
We apologize but our site is currently undergoing maintenance at this time.
        
Please check back later.
      
    

the exit() function is very importantn don forget to put it at the bottom, it will prevent all pages from being displayed.

application/libraries/maintenance.php

class Maintenance{

    private $CI;

    public function __construct() {

        $this->CI =& get_instance();

        // flag on and off
        $this->flag( $this->CI->uri->segment(1) );

        // get the flag status
        $check_maintenance = $this->CI->db->select('flag_mode')->where(array('setting_name' => 'maintenance'))->get('tbl_settings')->result();

        //display view if true
        if($check_maintenance[0]->flag_mode == '1')
            $this->CI->load->view('vw_maintenance');


    }

    private function flag($command){


        $this->CI->db->where('setting_name', 'evolving');

        switch($command){

            case "activate":                
                $this->CI->db->update('tbl_settings', array('flag_mode' => 1) ); 
            break;

            case "deactivate":
                $this->CI->db->update('tbl_settings', array('flag_mode' => 0) );
                redirect(site_url('/'));
            break;

        }
    }

}

autoload the library so it will be check every page load.

now you can activate and deactivate maintenance mode by typing or