$submitted_today = $this->Submission->find('count', array(
                'conditions' => array(
                    'Submission.ip' => $_SERVER['REMOTE_ADDR'],
                    'Submission.created >= CURRENT_DATE',
                    'Submission.created < CURRENT_DATE + INTERVAL 1 DAY'
                )
            ));

$submitted_today = DB::table('submissions')
                    ->where('ip', '=', $_SERVER['REMOTE_ADDR'])
                    ->where('created', '>=', 'CURRENT_DATE')
                    ->where('created', '<', 'CURRENT_DATE + INTERVAL 1 DAY')
                    ->get();