[SOLVED] header function

jbingman · September 1, 2007

I've been trying to use the header(); function to redirect to other pages such as...

Login not successful *redirects to login page*. but whenever i try to use the header it says that its being used by another line already. and no where in my code is there another line like it. what does this error mean and how do i fix it?

pocobueno1388 · September 1, 2007

It's probably giving you an error because the header function has to be used before any output to the browser.

Post your code and we can help you figure out where to put it.

jbingman · September 1, 2007

<? session_start(); ?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>Admin</title>

</head>

<body>

<?php

if (!$_SESSION["valid_user"])

{

// User not logged in, redirect to login page

header("location:login.php");

}

?>

<tr>

</tr>

</table>

<tr>

<tr>

</tr>

<tr>

<th height="22" scope="row"><div align="left"><a href="http://www.fresnosar.com/about.html">About</a>-</div></th>

</tr>

<tr>

<th height="22" scope="row"><div align="left"><a href="http://www.fresnosar.com/update/news.html">Current News</a>-(<a href="admin/newsedit.php">edit</a>)</div></th>

</tr>

<tr>

<th height="22" scope="row"><div align="left"><a href="http://www.fresnosar.com/cal/calendar.html">Calendar</a>-(<a href="admin/caledit.php">edit</a>)</div></th>

</tr>

<tr>

<th height="22" scope="row"><div align="left"><a href="http://www.fresnosar.com/photo/albums.html">Photos In Action</a>-(<a href="admin/picedit.php">add/edit</a>)</div></th>

</tr>

<tr>

<th height="22" scope="row"><div align="left"><a href="http://www.fresnosar.com/vid/videos.html">Videos</a>-(<a href="admin/videdit.php">add/edit</a>)</div></th>

</tr>

<tr>

<th height="22" scope="row"><div align="left"><a href="http://www.fresnosar.com/links.html">SAR Links</a>-(<a href="admin/linksedit.php">edit</a>)</div></th>

</tr>

<tr>

<th height="22" scope="row"><div align="left"><a href="http://www.fresnosar.com/app/apply.html">Apply</a>-</div></th>

</tr>

<tr>

<th height="20" scope="row"><div align="left"><a href="http://www.fresnosar.com/contact.html">Contact</a>-</div></th>

</tr>

</table></td>

<p>Admin Page </p>

</div> </td>

<?

// Display last login date

// Display logout link

echo "<p><a href=\"logout.php\">logout</a></p>";

?>

</td>

</tr>

</table>

<tr>

</tr>

</table>

</center>

</body>

</html>

pocobueno1388 · September 1, 2007

Try this:

<?php
session_start();

if (!$_SESSION["valid_user"])
{
// User not logged in, redirect to login page
header("location:login.php");

}
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>

<title>Admin</title>
<link href="/mainstyle.css" rel="stylesheet" type="text/css" />
<link rel="shortcut icon" href="favicon.ico" />
</head>

<body>

<center>
<table width="895" height="134"  style="background-image:url(/Untitled-3.gif)">
  <tr>
  <th width="99"><a href="/index.shtml"><img src="/logotrans3.gif" alt="logoSAR" width="118" height="126" border="0" />[/url]</th>
    <th width="782" height="128" scope="col"><a href="/index.shtml"><img src="/SARtitle2.gif" alt="sartitle" width="656" height="82" border="0" />[/url]</th>
  </tr>
</table>


<table width="895" height="822">
<tr>
  <td width="140" height="806" valign="top"><table width="140" height="232" border="0">
      <tr>
        <th width="134" height="22" scope="row"><div align="left">Home-</div></th>
      </tr>
      <tr>
        <th height="22" scope="row"><div align="left">About-</div></th>
      </tr>
      <tr>
        <th height="22" scope="row"><div align="left">Current News-(<a href="admin/newsedit.php">edit[/url])</div></th>
      </tr>
      <tr>
        <th height="22" scope="row"><div align="left">Calendar-(<a href="admin/caledit.php">edit[/url])</div></th>
      </tr>
      <tr>
        <th height="22" scope="row"><div align="left">Photos In Action-(<a href="admin/picedit.php">add/edit[/url])</div></th>
      </tr>
      <tr>
        <th height="22" scope="row"><div align="left">Videos-(<a href="admin/videdit.php">add/edit[/url])</div></th>
      </tr>
      <tr>
        <th height="22" scope="row"><div align="left">SAR Links-(<a href="admin/linksedit.php">edit[/url])</div></th>
      </tr>
      <tr>
        <th height="22" scope="row"><div align="left">Apply-</div></th>
      </tr>
      <tr>
        <th height="20" scope="row"><div align="left">Contact-</div></th>
      </tr>
  </table></td>
  <td width="642" align="center" valign="top">
  <div class="img">
    <p>Admin Page </p>
    </div>  </td>
<td width="97" align="left" valign="top">
<?
// Display last login date


// Display logout link
echo "<p><a href=\"logout.php\">logout[/url]</p>";
?>
</td>
  </tr>
</table>
<table width="895" height="57">
  <tr>
    <th height="51" style="border:none"><h6>Home | About | News | Calendar | Photos | Videos | Links | Apply | Contact</h6>
      <h6>Copyright 2007 FrameWorks Studios [email]admin@fresnosar.com[/email]. All rights reserved.</h6></th>
  </tr>
</table>
</center>
</body>
</html>

jbingman · September 1, 2007

YAY! thanks so much for you help.

so all header();'s have to be before the doctype code? as well as the session_start(); right?

pocobueno1388 · September 1, 2007

Yes, those should both be before any output. All the "doctype" stuff is considered output to the browser

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[SOLVED] header function

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