Headers already sent

[truenitin]

Notice: Undefined variable: p in c:\program files\easyphp1-8\www\index.php on line 11

Notice: Undefined variable: p in c:\program files\easyphp1-8\www\index.php on line 19

Warning: Cannot modify header information - headers already sent by (output started at c:\program files\easyphp1-8\www\index.php:11) in c:\program files\easyphp1-8\www\index.php on line 23

I am getting this error when i run the following code.

<?php

if (isset($_GET['page']) and $_GET['page'] != "") {
$p = $_GET['page'];
}
if (strpos($p,"..")) {
    die("Bad page request");
}

if (!$p) $p = "main";
$content_file=$_SERVER["DOCUMENT_ROOT"]."/".$p.".php";
if (!file_exists($content_file)) {
    header("Location: {$_SERVER["PHP_SELF"]}");
    exit();
}

$title = ($p) ? "$p - My Site!" : "Main page - My Site!";
include("header.php");
include($content_file);
include("footer.php");
?>

i get this error when i use session_register also.

A possible solution?

Nitin

[zawadi]

you need to define 'p' at the start of your script, you also need to make sure that you dont output ANYTHING till you get to the 'header()' including empty lines.

[wildteen88]

Try this instead:
[code=php:0]if (isset($_GET['page']) and $_GET['page'] != "")
{
    $p = $_GET['page'];
}
else
{
    $p = "main";
}

if (strpos($p, ".."))
{
        die("Bad page request");
}

$content_file = $_SERVER["DOCUMENT_ROOT"] . "/" . $p . ".php";

if (!file_exists($content_file))
{
    header("Location: {$_SERVER['PHP_SELF']}");
    exit();
}

$title = ($p) ? "$p - My Site!" : "Main page - My Site!";

include("header.php");
include($content_file);
include("footer.php");[/code]

[XoNoX]

I got the same problem
I resolved my problem just by open my database by "localhost" no IP