My html and php not working html form disapears(noob)


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Airline Survey</title>

</head>

<body>
<h1>Airline Survey</h1>
<?php

// opens connection to mysql server
$dbc = @mysqli_connect("localhost", "root");
if(!$dbc)
    {
         die("Did not connect :" . mysqli_error());
    }
//selects the Database    
mysqli_select_db("airlinedatabase")or die(mysqli_error());

// begins form so user can put data in database



?>


<form action="airlineSurvey.php" method ="POST" enctype="application/x-www-form-urlencoded" >

<table border="0">
  <tr>
      <td><center><strong>Last Name</strong></center></td>
    <td><center><strong>Date of Survey</strong></center></td>
    <td><center><strong>Date/Time of Flight</strong></center></td>
    <td><center><strong>Flight Destination</strong></center></td>
    <td><center><strong>Flight Number</strong></center></td>
    <td><center><strong>Seat Number</strong></center></td>
    
  </tr>
  <tr>
    <td><center><input type="text" name="lName" value="<?php echo $_POST['lName'];?>"/></center></td>
    <td><center><input type="text" name="dSurvey" value="<?php echo $_POST['dSurvey'];?>"/></center></td>
    <td><center><input type="text" name="dtFlight" value="<?php echo $_POST['dtFlight'];?>"/></center></td>
    <td><center><input type="text" name="fDest" value="<?php echo $_POST['fDest'];?>"/></center></td>
    <td><center><input type="text" name="fNum" value="<?php echo $_POST['fNum'];?>"/></center></td>
    <td><center><input type="text" name="sNum" value="<?php echo $_POST['sNum'];?>"/></center></td>
    
  </tr>
</table>
<br />
  <table>
    <tr>   
        <td> <p>Friendliness of customer staff?</p></td>
      <td ><label><input type="radio" name="q1" value="1"  />
      No Opinion</label></td>
      <td ><label><input type="radio" name="q1" value="2"  />
        Poor</label></td>
      <td ><label><input type="radio" name="q1" value="3"  />
        Fair</label></td>
      <td><label><input type="radio" name="q1" value="4"  />
        Good</label></td>
      <td ><label><input type="radio" name="q1" value="5" />
        Excellent</label></td>
      </table>
  </p>
  
  <br />
<table>
        <td><p>Space for luggage storage?</p></td>
        <td ><label><input type="radio" name="q2" value="1"  />
          No Opinion</label></td>
       
          <td><label><input type="radio" name="q2" value="2"  />
          Poor</label></td>
        
        <td><label> <input type="radio" name="q2" value="3"  />
        Fair</label></td>
       
          <td><label><input type="radio" name="q2" value="4"  />
        Good</label></td>
   
            <td><label><input type="radio" name="q2" value="5" />
        Excellent</label></td>
</table>
    </p>
    <br />
     
     <table>
         <td><p>Comfort of Seating?</p></td>
         <td><label><input type="radio" name="q3" value="1"  />
          No Opinion</label></td>
    
         <td><label><input type="radio" name="q3" value="2"  />
       Poor</label></td>
        
        <td><label><input type="radio" name="q3" value="3"  />
        Fair</label></td>
   
          <td><label> <input type="radio" name="q3" value="4"  />
        Good</label></td>
       
      <td><label> <input type="radio" name="q3" value="5" />
        Excellent</label></td>
</table>
    </p>
    
        <br /> 
     <table>
        <td><p>Cleanliness of aircraft?</p></td>     
         <td><label><input type="radio" name="q4" value="1"  />
          No Opinion</label></td>
    
         <td><label> <input type="radio" name="q4" value="2"  />
       Poor</label></td>
        
        <td><label><input type="radio" name="q4" value="3"  />
        Fair</label></td>
   
          <td><label><input type="radio" name="q4" value="4"  />
        Good</label></td>
       
      <td ><label><input type="radio" name="q4" value="5" />
        Excellent</label></td>
</table>
    </p>
         <br />
     <table>
         <td><p>Noise level of aircraft?</p></td>
         <td><label><input type="radio" name="q5" value="1"  />
          No Opinion</label></td>
    
         <td><label><input type="radio" name="q5" value="2"  />
       Poor</label></td>
        
        <td><label><input type="radio" name="q5" value="3"  />
        Fair</label></td>
   
          <td><label><input type="radio" name="q5" value="4"  />
        Good</label></td>
       
      <td><label><input type="radio" name="q5" value="5" />
        Excellent</label></td>
</table>
    </p>
    </tr>
    
  <p><input type="submit" name = "submit" value="Submit" />
<input type="reset" value="Reset" />
<input type="submit" name ="fetch" value="Get Airline Survey Table" />
</p>
</form>

<?php
if($_POST['fetch'])
    {
        echo "table width = '100%' border='1'>";
        echo "<tr><th>id</th><th>lName</th><th>dSurvey</th><th>dtFlight</th><th>fDest</th><th>fNum</th><th>sNum</th><th>q1</th><th>q2</th><th>q3</th><th>q4</th>                            <th>q5</th></tr>";
        
        $row= mysqli_fetch_row($Qres);
        do
        {
            echo "<tr><td>{$Row[0]}</td>";
            echo "<td>{$Row[1]}</td>";
            echo "<td>{$Row[2]}</td>";
            echo "<td>{$Row[3]}</td>";
            echo "<td>{$Row[4]}</td>";
            echo "<td>{$Row[5]}</td>";
            echo "<td>{$Row[6]}</td>";
            echo "<td>{$Row[7]}</td>";
            echo "<td>{$Row[8]}</td>";
            echo "<td>{$Row[9]}</td>";
            echo "<td>{$Row[10]}</td>";
            echo "<td>{$Row[11]}</td>";
            $row = mysqli_fetch_row($Qres);
        } While($row);
        
    }

if($_POST['submit'])
    {
        $lName = $_POST['lName'];
        $curnum = 0;
        if(!$lName)
        {
            $curnum ++;
            echo $curnum . ". You didnt enter a Last Name! <br>
";
        }
            $sqls = "SELECT * FROM `airlinesurvey` WHERE lName='".$lName."'";
            $Qres = mysqli_query($sqls) or die(mysqli_error());
            
            if(mysql_num_rows($Qres) > 0)
            {
                $curnum ++;    
                echo $curnum ." . The Last name '".$lName."' allready exists!<br>";
            }
            
            if($curnum == 0)
            {
                mysqli_query("INSERT INTO `airlinesurvey` VALUES(`id`,'".$lName."')") or die(mysqli_error());
            }

    }
?>

</body>
</html>