session_start() giving a warning at page load

Question

I am getting an error related to session_start() on page load.

Warning: session_start(): Cannot send session cache limiter - headers already sent

I understabd from the previous posts that we are supposed to put it right at the beginning of the page even before all HTML. So I changed my code to this:

    <?php
    if(session_id()=='')
    {
       session_start();
    }
    if (!isset($_SESSION['can_access']) || ($_SESSION['can_access'] != TRUE))
    {
       echo "Access denied";
       exit();
    }
    ?>
    <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge chrome=1" />


 </head>
 <body>

But I still get this error. Could anyone suggest what could be done?

Make sure that there is not even a blank space before the php tag. — Achrome, Oct 21 '14 at 03:43
Hi all, yes that was the problem! I had some white spaces before the block. Thanks a lot! It works now. — kate, Oct 21 '14 at 03:45

score 1 · Accepted Answer · answered Oct 21 '14 at 03:42

1

Make sure you have not output anything to the browser before you call that line, including any white space or line breaks.

answered Oct 21 '14 at 03:42

avoliva

3,181
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1

And to clarify even further, indent before the ` – adrenalin Oct 21 '14 at 03:45
@avoliva: Yes, that was exactly the problem. I removed the white space before the php block and it works fine now. Thank you! – kate Oct 21 '14 at 03:46

score 0 · Answer 2 · answered Oct 21 '14 at 03:47

0

This error is because the PHP script sent the HTTP headers prior to the session_start()Make sure that you don't send any contents before calling session_start().

answered Oct 21 '14 at 03:47

Hungry Mind

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Yes, I tried removing all content before block and it worked. Thanks for your reply. – kate Oct 21 '14 at 16:25

session_start() giving a warning at page load

2 Answers2