Post data ind i databasen

Hej Eksperter.

Er igang med at lave en slags opslagstavle til mig og mine staff members.

Men kan ikke rigtig få det til at virke :S Nogen der kan se hvad der er galt? Får den her error:


You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1



og har den her kode:

<?php
            require_once('connect.php');
$playername = mysql_query("SELECT accountname FROM players WHERE id=$_SESSION[user_id]") or die(mysql_error());
$playername_data = mysql_fetch_array($playername);
    if (isset($_POST['submitBtn'])) {
        $topic    = (isset($_POST['topic'])) ? addslashes(htmlentities($_POST['topic'])) : '' ;
        $message  = (isset($_POST['message'])) ? addslashes(htmlentities($_POST['message'])) : '' ;
        $writer  = $playername_data;
        $time  = now();

            $sql = "INSERT INTO staffmsg (topic,message,writer,time) VALUES (";
            $sql .= "'".$topic."','".$message."','".$writer."','".$time."')";
            mysql_query($sql) or die(mysql_error());

    }
    else {

?>

  </font>
       
 
  <form action="staffmsg2.php" method="post" name="staffmsg">
    <table>
      <tr><th>Topic:</th><td><input name="topic" /></td></tr>
      <tr><th>Message:</th><td><textarea name="message" cols="30" rows="3"></textarea></td></tr>
      <td><input type="submit" name="submitBtn" value="Submit!"/></td>
    </table> 
</form>
<?php } ?>