dedecms怎么实现游客可以提问、回答及查看

if(empty($this->cfg_ml->M_ID))
{
ShowMsg('您尚未登录，请先登录',$GLOBALS['cfg_ask_member']);
exit;
}
if($this->cfg_ml->M_Spacesta < 0)
{
ShowMsg('您还没有通过审核,暂时不能提问,请耐心等....','-1');
exit;
}

if($rs)
{
ShowMsg('请勿重复回复同一问题!','-1');
exit;
}

if($question)
{
if($question['uid'] == $this->cfg_ml->M_ID)
{
ShowMsg('提问者自己不能回答自己的问题', '-1');
exit;
}else if($question['expiredtime'] < $GLOBALS['cfg_ask_timestamp']){
ShowMsg('问题已经过期','-1');
exit;
}
$data['tid'] = $question['tid'];
$data['tid2'] = $question['tid2'];
$data['userip'] = getip();
}else{
ShowMsg('回答的问题不存在','-1');
exit;
}

if(empty($this->cfg_ml->M_ID))
{
ShowMsg('您尚未登录，请先登录',$GLOBALS['cfg_ask_member']);
exit;
}

if(empty($cfg_ml->M_ID))
{
ShowMsg('您尚未登录，请先登录',$GLOBALS['cfg_ask_member']);
exit;
}
if($cfg_ml->M_Spacesta = 0)
{
ShowMsg('您还没有通过审核,暂时不能提问,请耐心等....','-1');
exit;
}

if(preg_match("#7#",$GLOBALS['safe_gdopen'])){
$svali = GetCkVdValue();
if(strtolower($data['vdcode']) != $svali || $svali=='')
{
ResetVdValue();
ShowMsg('验证码错误!', '-1');
exit();
}
}
//检查验证问题
$faqkey = isset($data['faqkey']) && is_numeric($data['faqkey']) ? $data['faqkey'] : 0;
if($GLOBALS['gdfaq_ask'] == 'Y')
{
global $safefaqs;
if($safefaqs[$faqkey]['answer'] != $data['safeanswer'] || $data['safeanswer'] =='')
{
ShowMsg('验证问题答案错误', '-1');
exit();
}
}