PHP实现留言板功能

HTML代码

<div class="continer" >
    <div class="head" style="background-color:rgb(217,237,247);height:50px;vertical-align:middle"><h2  style="color: rgb(81,117,114)">PHP留言本</h2></div>
    <div class="body">
        <volist name="guestbook" id="vo">
            <div class="panel">
                <div class="panel-head" style="background-color: rgb(223,240,216)">
                    <span class="nickname" style="color: rgb(104,148,99)">留言者: {$vo.nickname}</span>
                    <span style="color: rgb(104,148,99)">|</span>
                    <span class="email" style="color: rgb(104,148,99)">邮箱: {$vo.email}</span>
                    <span class="time" style="float: right;color: rgb(104,148,99)">时间: {$vo.replytime}</span>
                </div>
                <div class="panel-body">
                    <span class="content">内容: {$vo.content}</span>
                    <span class="time" style="float: right">{$vo.id}楼</span>
                </div>
            </div>
        </volist>
    </div>
    <div class="foot">
        <form method="post">
            <div class="panel" style="background-color: rgb(245,245,245)">
                <div class="panel-body" style="padding:30px; width: 20%">
                    <div class="form-group">
                        <div class="field field-icon-right">
                            <input id="nickname" type="text" class="input" name="nickname" placeholder="游客姓名"/>
                        </div>
                    </div>
                    <div class="form-group">
                        <div class="field field-icon-right">
                            <input type="text" id="content" class="input" name="content" placeholder="留言内容"/>
                        </div>
                    </div>
                    <div class="form-group">
                        <span></span>
                        <span class="field">
                            <input type="text" id="email" class="input" name="email" placeholder="Email"/>
                        </span>
                    </div>
                    <div class="form-group">
                        <span><button name="liuyan">留言</button></span>
                        <span><button name="restart" onclick="clearDefaultText(this)">重置</button></span>
                    </div>
                </div>

            </div>
        </form>
    </div>
</div>
<script>
function clearDefaultText(){
    var nickname = document.getElementById("nickname");
    var content = document.getElementById("content");
    var email = document.getElementById("email");
    nickname.value="";
    content.value="";
    email.value="";
}
</script>

PHP代码

public function hierarchicalauthority(){

    if(isset($_POST["liuyan"]))
    {
        $data["nickname"]=$_POST["nickname"];
        $data["content"]=$_POST["content"];
        $data["email"]=$_POST["email"];
        $data["status"]=1;
        $data["replytime"]=date("Y-m-d H:i:s",time());
       // print_r($data);die();
        $user=M("daili_liuyan_guestbook");
        $maxid=$user->max("id");
        $data["id"]=$maxid+1;
        $user->add($data);


   // print_r($_POST);die();
    }
    $guestbook = D("daili_liuyan_guestbook")->select();
    $this->assign("guestbook",$guestbook);
    $this->display();
}

数据表:(表名为daili_liuyan_guestbook)

最终效果图：

谢谢观看~