/**(V3.8 新增)(V7.1 更新)
 * 获取用户所有信息
 * @param $userid 
 * @param $additional  是否获取附表信息
 * @return array|false
 */
function get_memberinfo($userid, $additional=false){	
	$memberinfo = array();
	if(!$userid) return $memberinfo;
	global $member;
	$member = isset($member) ? $member : D('member');
	$memberinfo = $member->field('username,regdate,lastdate,lastip,loginnum,email,groupid,amount,experience,point,status,vip,overduedate,email_status')->where(array('userid' => $userid))->find();
	if(!$memberinfo) return false;
	
	if($additional){
		global $member_detail;
		$member_detail = isset($member_detail) ? $member_detail : D('member_detail');
		$data = $member_detail->where(array('userid' => $userid))->find();
		$memberinfo = array_merge($memberinfo, $data);
	}
	return $memberinfo;
}