on_duplicate_update 3

gistfile1.txt

require_once(BASEPATH.'database/DB_driver.php');

if ( ! isset($active_record) OR $active_record == TRUE)
{
   require_once(BASEPATH.'database/DB_active_rec'.EXT);

   // get the CI instance
   $CI = & get_instance();

   $prefix = $CI->config->item('subclass_prefix');

   if (file_exists(APPPATH.'core/'.$prefix.'DB_active_rec'.EXT))
   {
       require_once(APPPATH.'core/'.$prefix.'DB_active_rec'.EXT);

       if ( ! class_exists('CI_DB'))
       {
         eval('class CI_DB extends '.$prefix.'DB_active_record { }');
       }
   } 
   else 
   {
       if ( ! class_exists('CI_DB'))
       {
         eval('class CI_DB extends CI_DB_active_record { }');
       }
   } 
}
else
{
  if ( ! class_exists('CI_DB'))
  {
    eval('class CI_DB extends CI_DB_driver { }');
  }
}

require_once(BASEPATH.'database/drivers/'.$params['dbdriver'].'/'.$params['dbdriver'].'_driver.php');