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while($row = mysql_fetch_array($selectGaeste))
  {
  echo "<tr class=\"text1\">
            <td>$row[UserName]</td>
            <td>$row[Vorname]</td>
            <td>$row[Plz]</td>
            <td>$row[Ort]</td>";
            $test = $row[Anmelden];
            if ($test > 0)
            {
            echo"<td> Ja</td>";
            }
            else
            {
            echo"<td> Nein</td>";
            }
      echo "</tr>";
   };

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if ($row['Anmelden'] > 0)
{
  echo '<td>Ja</td>';
}
else
{
  echo '<td>Nein</td>';
}