帮看下这段代码，插入数据库部分出有关问题，没找到异常

nbsp;html&gt;<br><br>        <br>                <meta><br>                <title>War-game -Add Your score</title><br>        <br>        <br>                <h2>War game - add your score</h2><br>                <?php <br />                        if(!empty($_POST['submit']))<br>                        {<br>                                $first_name=$_POST['first_name'];<br>                                $last_name=$_POST['last_name'];<br>                                $score=$_POST['score'];<br>                                echo $first_name;<br>                                echo $last_name;<br>                                echo $score;<br><br>                                $dbc=mysqli_connect('localhost','root','pengyu2408','score_list')or die('error in connet');<br>                                $query="INSERT INTO score_lis(first_name,last_name,score) VALUES('$first_name','$last_name','$score')";<br>                                mysqli_query($dbc,$query)or die('error_2');<br>                                echo '<p>thanks for adding your new high score!</p>';<br>                                echo '<p><strong>FIRST_NAME:</strong>'.$first_name.'<br>';<br>                                echo '<strong>LAST_NAME:</strong>'.$last_name.'</p>';<br>                                echo '<p><strong>Score:</strong>'.$score.'<br></p>';<br>                                echo '<p><a></a></p>';<br>                                //clear the score data to clear the form<br>                                $firet_name="";<br>                                $last_name="";<br>                                mysqli_close($dbc);<br>                        }<br>                ?&gt;<br>                <hr><div class="clear"></div>