"$_SESSION is showing some error in PHP"

manikantha · 09-22-2004, 08:08 PM

Hi all,

I am using sessions to develop a php page. But it is showing the following errors....

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /var/www/html/Project/existing_user.php:2) in /var/www/html/Project/existing_user.php on line 2

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /var/www/html/Project/existing_user.php:2) in /var/www/html/Project/existing_user.php on line 2

And this is the code which I have written in existing_user.php

<?php

session_start(); /*Showing Error Here*/

$login=$_POST("Login"); /*Which I am getting from before page */
session_register('login');
$_SESSION('login')=$login;

?>

Could any one please help me!!

CroMagnon · 09-22-2004, 09:24 PM

Do you have any whitespace (or anything) before the <?php tag?

manikantha · 09-22-2004, 10:00 PM

hi CroMagnon,

ThanQ U for your advice .. I have not seen that there is a new line before <?php tag ... and it is now working after removing it.

I have one more doubt can U please help me...

In the above file I have stored the login in $_SESSION('login') .........

But in some other file I am not able to retrieve it...

ThanQ U

CroMagnon · 09-22-2004, 10:13 PM

Hmmm... are you calling session_start() in your other file?

manikantha · 09-22-2004, 10:17 PM

ya!! I am.. and one more thing is that when I am checking with

if(isset($_SESSION['login']))
echo ("YES\n");
else
echo("NO\n");

It is printing NO

HappyDude · 09-22-2004, 10:46 PM

shouldnt it be:

if(isset($_SESSION['login'])) {
echo ("YES\n");
} else {
echo("NO\n");
}

manikantha · 09-22-2004, 10:47 PM

ya!! Sorry I have given like that only.......

CroMagnon · 09-22-2004, 11:08 PM

Either of those will work, as long as there is only one statement in the if block. But it's better to use the braces anyway, since you can add more lines later.

I used this code:

(test1.php)

Code:

<?php
session_start();
$login = "CroMagnon";
session_register("login");
?>
<html>
<body>
<a href="test2.php">Test!</a>
</body>
</html>

(test2.php)

Code:

<?php
session_start();
?>
<html>
<body>
<?php
if (isset( $_SESSION["login"] ))
        echo "YES!";
else
        echo "Problems!";
?>
</body>
</html>

and this worked fine for me. Perhaps you can compare it with your code and see where the difference is (I haven't posted my username from a form, but that shouldn't matter).