PHP header("Location: $url");

Question

Possible Duplicate:
Headers already sent by PHP

Here i have strange problem to protect my pages , to check is session started, if not redirect to login,

    <?php 
require_once ('includes/config.inc.php'); 

// Start output buffering:
ob_start();

// Initialize a session:
session_start();

// Check for a $page_title value:
if (!isset($page_title)) {
    $page_title = 'User Registration';
}

// If no first_name session variable exists, redirect the user:
if (!isset($_SESSION['first_name'])) {

    $url = BASE_URL . 'index.php'; 
    ob_end_clean(); // Delete the buffer.
    header("Location: $url");
    exit(); // Quit the script.

}
?>

I got this error: on line 8:

session_start() [function.session-start]: Cannot send session cache limiter - headers already sent

Can someone post a good solution to check if the session is started, and if not redirect to login page else stay on page?? Txanks

Remove the whitespace before the opening ` – Michael Berkowski Apr 07 '12 at 00:46 — Michael Berkowski, Apr 07 '12 at 00:46
If there's no whitespace before the ` – Jürgen Thelen Apr 08 '12 at 06:55 — Jürgen Thelen, Apr 08 '12 at 06:55

score 5 · Answer 1 · answered Apr 07 '12 at 00:46

5

This is your problem:

    <?php 
^^^^

You cannot have output any content before the headers have been sent; that includes whitespace.

answered Apr 07 '12 at 00:46

Oliver Charlesworth

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No white space in just here? Any else idea? – Miomir Dancevic Apr 07 '12 at 08:31
No, i just format here on page is like that – Miomir Dancevic Apr 07 '12 at 12:50

score 1 · Answer 2 · answered Apr 07 '12 at 00:48

1

Whenever, you see headers already sent, that means somethings is being output before the PHP could send the headers.

In your case, it is the additional sources before the PHP tag as Oli Charlesworth said.

answered Apr 07 '12 at 00:48

Starx

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PHP header("Location: $url");

2 Answers2