帮看下这段代码，插入数据库部分出有关问题，没找到异常

        
                
                
        
        
                
War game - add your score

                                        if(!empty($_POST['submit']))
                        {
                                $first_name=$_POST['first_name'];
                                $last_name=$_POST['last_name'];
                                $score=$_POST['score'];
                                echo $first_name;
                                echo $last_name;
                                echo $score;

                                $dbc=mysqli_connect('localhost','root','pengyu2408','score_list')or die('error in connet');
                                $query="INSERT INTO score_lis(first_name,last_name,score) VALUES('$first_name','$last_name','$score')";
                                mysqli_query($dbc,$query)or die('error_2');
                                echo '
Thanks for adding your new high score!
';
                                echo '
FIRST_NAME:'.$first_name.'
';
                                echo 'LAST_NAME:'.$last_name.'
';
                                echo '
Score:'.$score.'
';
                                echo '
<<Back to hight score
';
                                //clear the score data to clear the form
                                $firet_name="";
                                $last_name="";
                                mysqli_close($dbc);
                        }
                ?>