[Wiki] Store session in database

CREATE TABLE IF NOT EXISTS `sessions` (
  `id` char(32) NOT NULL,
  `expire` int(11) DEFAULT NULL,
  `data` blob,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

'session'=>array(
            'class'=>'system.web.CDbHttpSession',
            'connectionID'=>'db',
            'sessionTableName'=>'sessions',
            'autoStart'=>true,
            'sessionName'=>'any',
            'timeout'=>86400,
        ),