Update Bazy danych, jak poprawnie Opcje

[Qatadah]

Cześć. Jak poprawnie z aktualizować bazę danych. Pobranie z bazy danych jest poprawne. Nie działa tylko update.
Nie wyświetla błędów ani w kodzie i po otwarciu strony. Mam dwa pola input w każdym rekordzie i według głównego ID w każdym rekordzie chce zrobić update bazy. Albo czegoś mi brakuję albo źle ułożyłem zmienne w update

tabela którą che edytować w bazie wygląda tak:

matches (matchID, homeID, guestID, homeGoals, guestGoals)

connect.php

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<?php
$db_server = "localhost";
$db_username = "root";
$db_password = "";
$db_database = "football_db";
$conn = new PDO("mysql:host=$db_server;dbname=$db_database", $db_username, $db_password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$conn->exec("set names utf8");
    echo 'Connected to Database <br/>';
?>
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index.php

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<form action="" method="put">
  <table width="100%">
   <thead>
    <tr>
      <td class="colsp" colspan="5">Terminarz</td>
    </tr>
    <tr class="subcolor title-row">
		<td style="width: 10%">id</td>
		<td style="width: 40%" class="left">Gospodarz</td>
      <td style="width: 40%">Gość</td>
      <td style="width: 5%">Home<br/>Goals</td>
	  <td style="width: 5%">Guest<br/>Goals</td>
   </tr>
	  </thead>
	<tbody>
<?php
if(isset($_POST['Submit'])){
	$hGoals = $_POST['inphomegoals'];
	$gGoals = $_POST['inpguestGoals'];
	$update="UPDATE matches SET homeGoals=$hGoals, guestGoals=$gGoals where matchID = ".$matchID;
    $stmt = $conn->prepare($update);
    $stmt->execute();
    echo $stmt->rowCount() . " records UPDATED successfully";
	}
    $display = $conn->prepare(
                              "SELECT
                                   m.matchID,
                                   hc.clubName as homeClub,
                                   gc.clubName as guestClub,
                                   m.homeGoals,
                                   m.guestGoals
                           FROM matches AS m
                           JOIN clubs AS hc ON hc.clubID = m.homeID
                           JOIN clubs AS gc ON gc.clubID = m.guestID
			   ORDER BY matchID ASC ");
 
$display->execute();
$results = $display->fetchAll();
foreach ($results as $index => $row){
?>
        <tr>
            <td><label class="matchID"><?php echo $row['matchID']; ?></label></td>
            <td><label><?php echo $row['homeClub']; ?></label></td>
            <td><label><?php echo $row['guestClub']; ?></label></td>
            <td><label><input type="number" name="inphomegoals" value="<?php echo $row['homeGoals']; ?>"/> : </label></td>
	    <td><label><input type="number" name="inpguestGoals" value="<?php echo $row['guestGoals']; ?>"</label></td>
        </tr>
<?php } ?>
	</tbody>	
          <tfoot>
  	        <tr>
             <td colspan="5"><input type="submit" value="Add To Base" name="Submit" style="width: 150px; height: 45px"</td>
            </tr>
          </tfoot>
</table>
</form>
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