Need help with ""Warning: Cannot modify header information ""

[TheFreak]

Hey guys,

 

well i am always stuck with this ..i am getting an error message 

 

""Warning: Cannot modify header information - headers already sent by (output started at /usr/local/4admin/apache/vhosts/oneview.org/httpdocs/MyNewsletter/admin/index.php:6) in /usr/local/4admin/apache/vhosts/oneview.org/httpdocs/MyNewsletter/admin/index.php on line 20"

 

i know the headers shouldn't be below html but i cant figure it out here's my code and someone please also explain me in details how to solve this problem,so next time i wont get stuck here again.

 

<?php
session_start();
?>
<link rel="stylesheet" href="style.css" type="text/css">
<center><table border='0'><tr><td valign='top' width=30%>
<?php
include "connect.php";
if(isset($_SESSION['admin']))
{
include "side.php";
   print "</td>";
   print "<td valign='top' width=70%>";
   print "<table class='maintable'><tr class='headline'><td><center>Main Admin</center></td></tr>";
   print "<tr class='mainrow'><td>";
   print "Welcome to the admin section,please select the option from the main menu.<br>";
   print "</td></tr></table>";
}
else
{
header('Refresh: 0; url=login.php');
}

 

 

 

 

 

[LooieENG]

You can't use header() after HTML has been output.

 

Use the meta refresh tag

[peranha]

This is outputing data already, and you cannot redirect

 

<center><table border='0'><tr><td valign='top' width=30%>

[DeanWhitehouse]

Please read this before posting header errors

http://www.phpfreaks.com/forums/index.php/topic,37442.0.html

It is in big letters at the top of the forum , so you couldn't of missed it.

[azfar siddiqui]

Not even a single HTML output can be sent before Redirection function header(); Put all the HTML after the header() function . and call the exit(); after header();