$config['encryption_key'] = '';//这个一定要设置 以加密自己的cookie等
$config['cookie_secure'] = TRUE;//设置为TRUE
/*
|--------------------------------------------------------------------------
| Global XSS Filtering全局XSS过滤设置为TRUE
|--------------------------------------------------------------------------
|
| Determines whether the XSS filter is always active when GET, POST or
| COOKIE data is encountered
|
*/
$config['global_xss_filtering'] = TRUE;
//防范csrf攻击
$config['csrf_protection'] = TRUE;
$config['csrf_token_name'] = 'mall_tooken';
$config['csrf_cookie_name'] = 'mall_cookie';
$config['csrf_expire'] = 7200;//设置适当的时间

$this->input->get( 'name', true );

$this->input->post( 'name', true );