public function signupHandler()
{
$username = Util::fetch_post('username');
$password = Util::fetch_post('password');
$realname = Util::fetch_post('realname');
if ($username == null || $password == null || $realname == null) {
$this->error(2);
}
$userTable = new UserTable();
if ($userTable->is_exist($username)) {
$this->errorMsg('该用户已存在');
}
// 插入数据
$userTable->insert($username, $password, $realname);
$result = $userTable->select($username, $password);
$userExtraTable = new UserExtraTable();
$userExtraTable->insert($result['user_id']);
SQLUtil::login($username, $password);
Util::go(URL . 'manager/');
}