error message from header help!

[simmsy]

This is the error message:

Warning: Cannot modify header information - headers already sent by (output started at /home/public_html/main.php:12) in /home/public_html/main.php on line 61

 

I've tried reading into this but find no solutions if anyone can help I would be very grateful. I'm just trying to get the code to take the user to register page if they not a member heres the code im using

 

            <table border="0" width="220" align="center">

                <tr>

  <? if(!session_is_registered("username")){ // if session variable "username" does not exist.

echo "<td width='71'>Username:</td>

      <td width='139'><input type='text' name='username' size='16' style='font-family: Times New Roman, Times, serif; font-size: 11pt;' /></td>

      </tr>

      <tr>

      <td width='71'>Password:</td>

      <td width='139'><input type='password' name='password' size='16' style='font-family: Times New Roman, Times, serif; font-size: 11pt;' /></td>

      </tr>

      <tr>

      <td colspan='2' align='center'><input name='login' type='submit' value='Log In' style='background-color: #900002; border-color: #555555; color: #FFFFFF; font-weight: bold; width: 60px;' /></td>";

}else{

echo "<td><b>Welcome $username</b><br /><a href='logout.php'><b>Logout</b></a></td>";

}

?>

                </tr>

            </table>

</form></div>

<div id="menutext"><span class="class1"><a href="http://www.fightwatcher.com">Home</a>              <a href="http://www.fightwatcher.com">News</a>              <a href="http://www.fightwatcher.com">Profile</a>              <a href="http://www.fightwatcher.com">Friends & Fighters</a>              <a href="http://www.fightwatcher.com">Videos</a>              <a href="http://www.fightwatcher.com">Groups</a>              <a href="http://www.fightwatcher.com">Forum</a></span></div>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

<p> </p>

<? if(!session_is_registered("username")){

header("Location: http://www.fightwatcher.com/register.html");

}else{

include("connect.php");

$result = mysql_query("SELECT * FROM signup ORDER by date AND time LIMIT 10");

echo "<table cellpadding=0 cellspacing=0 width=163>

<tr bgcolor=#990000><td colspan=2 align=center height=24><font color=#FFFFFF><b>Newest Users:</b></font></td></tr>";

while($row = mysql_fetch_array($result))

{

$username = $row['username'];

$gender1 = $row['gender'];

if ($gender1=="male")

{

$gender2="<font color=#0066FF><b>M</b></font>";

}

if ($gender1=="female")

{

$gender2="<font color=#FF33CC><b>F</b></font>";

}

echo "<tr><td align=center width=100>$username</td><td align=center width=57>$gender2</td></tr>";

}

echo "</table>";

}

?>

</body>

 

Thanks

[trinaryoc]

There's a sticky about Headers... but basically... you cant have any output to the user populate before altering a header because once you echo anything a header is automatically generated. you can buffer your output if you'd like but that's kinda dirty....

 

 

[simmsy]

ahh rite ok thanks