Warning: session_start(): Cannot send session, I have tried my all possible solution

Question

I tried some solution from internet, I put session_start(); at first line, also try by using @ob_start(); Any other solution??? My code is here:

<?php
session_start();
require_once('page.inc');  

?>

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>site 1</title>
<meta name="keywords" content="universe, blog theme, black, website template, templatemo" />
<meta name="description" content="About Universe, Our Company, free website template" />
<link href="templatemo_style.css" rel="stylesheet" type="text/css" />

<script type="text/javascript" src="js/jquery-1.6.3.min.js" ></script>


</head>
<body>
<?php
if(!isset($_SESSION['loggedinuser']))
{
if (isset($_POST['Signin']))
{
$username=$_REQUEST['username'];
if($username=='a')
$_SESSION['loggedinuser']=$username;
else
echo " the username or password you entered do not matchted ! ";

}
else
{
?>
 <form  method="post" action="index.php" >
<input type="text" name="username" id="username" > 
<input name="Signin" type="submit" value="Signin" />
</form>
<?

}
}
    else
    //something else
?>
    </body>
    </html>

here the error is:

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /usr/local/apache2/htdocs/jasi/medu_quiz_22111_bl/index.php:1) in /usr/local/apache2/htdocs/jasi/medu_quiz_22111_bl/index.php on line 2

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /usr/local/apache2/htdocs/jasi/medu_quiz_22111_bl/index.php:1) in /usr/local/apache2/htdocs/jasi/medu_quiz_22111_bl/index.php on line 2

possible duplicate of [How to fix "Headers already sent" error in PHP](http://stackoverflow.com/questions/8028957/how-to-fix-headers-already-sent-error-in-php) — vascowhite, Dec 10 '14 at 07:28
Not actually, Could you please help me to find out what header information is going to browser before session_start(); ??? @vascowhite — user3129375, Dec 10 '14 at 07:30
@user3129375 Have you read and tried everything in the question I linked to? Your answer is in there somewhere. This question is, without doubt, a duplicate of that. — vascowhite, Dec 10 '14 at 07:36
I tried to try all solutions , but in my case I could not find out my problem , I cant cope with your solution.... @vascowhite — user3129375, Dec 10 '14 at 07:41
its just a warning message better u put error_reporting(0) and go head .. — I'm Geeker, Dec 10 '14 at 07:41
actually I am doing this (error_reporting(0);) from last 5 month. but suddenly today it stops creating session and not executing following codes that should execute after session creation. Thus I am trying to find out. @faizphp — user3129375, Dec 10 '14 at 07:44
did u check with phpinfo() ? is ur Session Support is enabled ? — I'm Geeker, Dec 10 '14 at 07:45
Yes , I did it. even Opera showing this error but creating session also. but in mozilla and google chrome does not creating session. @faizphp — user3129375, Dec 10 '14 at 07:49
ok comment the line session_start() and check again!! do u got error ? — I'm Geeker, Dec 10 '14 at 07:50
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/66546/discussion-between-faizphp-and-user3129375). — I'm Geeker, Dec 10 '14 at 07:51
use this if(session_status()!=PHP_SESSION_ACTIVE) session_start().. — I'm Geeker, Dec 10 '14 at 07:52

score 1 · Answer 1 · answered Dec 10 '14 at 07:53

1

Check whitespaces before <?php, ensure that the <?php is the first character, not tabbed or spaced.

answered Dec 10 '14 at 07:53

Taalaibek M

101
4

This is most likely the issue. – Darren Dec 10 '14 at 07:54
ya, is it a problem for this issue ?? – user3129375 Dec 10 '14 at 08:02
Session is working fine, I tried the code, on opera it is a caching issue – Peter Manoukian Dec 10 '14 at 08:25

Peter Manoukian · Answer 2 · 2014-12-10T08:22:48.410

I have tried your code and all works fine, I copied pasted it as is and the form is showing normal

even submitted the form twice once with the correct value and form disappeared and once with the wrong value and the message that it is a wrong value

if you have placed some white space before :

        <?php
        session_start();
        ....
        ?>

That might produce an error, nothing should come before the session_start() part, maybe you have note created the page: page.inc and that is doing the damage

This is the new code I tried, and these are step you can take:

I have checked it with opera, yes at first it was not showing, but with a heavy refresh it did show, try to do a no caching mechanism, by maybe sending it to page with a random id, this will clear the cache, the problem is not session in opera, the session is working, it is in caching,

Refresh your opera and you will, I took the address and copied it into another tab on opera, and the session showed, This is the complete copy on my version:

        <?php
        session_start();
        require_once('page.inc');  

        ?>

        ........

        <?php
        if(!isset($_SESSION['loggedinuser']))
        {
            if (isset($_POST['Signin']))
            {
                $username=$_REQUEST['username'];
                if($username=='a')
                $_SESSION['loggedinuser']=$username;
                else
                echo " the username or password you entered do not matchted ! ";

            }
            else
            {
            ?>
             <form  method="post" action="index.php" >
                    ......
            </form>
            <?

            }
        }
        else if(isset($_SESSION['loggedinuser']))
        {
                $ses = $_SESSION['loggedinuser'];
                echo "LINE 47 session is $ses ";
        }
        else
        {
            $ses2 = $_SESSION['loggedinuser'];
            echo "LINE 51 session is $ses2 ";

        }
        ?>

            </body>
            </html>

This produces:

Line 2 included a page LINE 47 session is a 56

page.inc

        <?php
        echo " Line 2 included  a page ";
        ?>

This code is running from 5 month, although the warning was seen. but suddenly it stops to create session......I cant find out the problem..... — user3129375, Dec 10 '14 at 08:00
Your code on Line 44: else { I have added this : else { $ses = $_SESSION['loggedinuser']; echo "session is $ses "; } It is displaying correctly: session is a — Peter Manoukian, Dec 10 '14 at 08:06
Yes it is happening for Opera for me. but not for Mozilla and google chrome !! really its such a problem I have never faced !! — user3129375, Dec 10 '14 at 08:09
I have checked it with opera, yes at first it was not showing, but with a heavy refresh it did show, try to do a no caching mechanism, by maybe sending it to page with a random id, this will clear the cache, the problem is not session inopera, the session is working, it is in caching, refresh your opera and you will, I took the address and copied it into another tab on opera, and the session showed, This is the complete copy on my version, I will add on the answer, I appreciate if you mark my question as useful or the right answer — Peter Manoukian, Dec 10 '14 at 08:19

Warning: session_start(): Cannot send session, I have tried my all possible solution

2 Answers2