<?php
$host="localhost"; // Host naam
$username="root"; // Mysql login naam
$password=""; // Mysql wachtwoord
$db_name="marketplace"; // Database naam
$tbl_name="stageplek"; // Table naam

// Verbinding maken met de server en de database selecteren.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");

$sql="SELECT * FROM $tbl_name ORDER BY id ASC";
// OREDER BY id ASC is het orderen van de id's van laag naar hoog.
$result=mysql_query($sql);
?>

<table width="40%" border="0" align="center" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td width="6%" align="center" bgcolor="#E6E6E6"><strong>#</strong></td>
<td width="34%" align="center" bgcolor="#E6E6E6"><strong>Titel</strong></td>
</tr>
<?php
while($row = mysql_fetch_array($result))
  {
  echo "<tr>";
  echo "<td>" . $row['id'] . "</td>";
  echo "<td>" . $row['titel'] . "</td>";
  echo "<td><a href=\"view_topic.php?id= . $row['id'] . \"> . $row['titel']; .</a></td>";
  echo "</tr>";
  }
echo "</table>";

?>

<table align="center" >
<tr>
<td colspan="5" align="center" bgcolor="#E6E6E6"><a href="topic_maken.php"><strong>Create New Topic</strong> </a></td>
</tr>
</table>

gives the error:
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING in C:\wamp\www\Forum\forum_index.php on line 28

The line that doesnt work:
echo "<td><a href=\"view_topic.php?id= . $row['id'] . \"> . $row['titel']; .</a></td>";

Need to show the topic title and that u can click on it. It will take you to a page with that topic title id.