Beginning Sessions with Problem

[andyalean]

Hello I am starting to use php.I am trying to work with sessions,and have come up with error from a small php file.

<?php
        session_start();
        
         $user = $_SESSION['user'];
        echo $_SESSION['user'];
?>

 

There are 2 warnings of on Warning: session_start().

 

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\Sessions\index.php: in C:\xampp\htdocs\Sessions\index.php on line 10

 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\Sessions\index.php: in C:\xampp\htdocs\Sessions\index.php on line 10

 

How do I enable my php install to use sessions like I have demonstrated?

 

 

[premiso]

Read the error. You already have output on line 8 of index.php.

 

You cannot do any type of header function after output has been sent, this includes white spaces, echo's print's etc.

 

Show us the first 15 lines of index.php and we can help you resolve the issue. As the code you have shown here does not correspond with the error you have pasted.

 

EDIT:

As a side note, HEADER ERRORS - READ HERE BEFORE POSTING THEM  Sticky at the top of this forum.

[andyalean]

Thanks for the quick reply.

I modifed the code to just php start my session like so:

<?php
        session_start();
?>

Same as actual layout source code.

 

Then got same error.

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\Sessions\index.php: in C:\xampp\htdocs\Sessions\index.php on line 10

 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\xampp\htdocs\Sessions\index.php: in C:\xampp\htdocs\Sessions\index.php on line 10

 

Wow I got same error? how come this gee what is going wrong um?

 

[premiso]

Show us the first 15 lines of index.php and we can help you resolve the issue. As the code you have shown here does not correspond with the error you have pasted.

[andyalean]

Thanks sorry my index.php file is the same as above 3 lines only. like :

<?php
        session_start();
?>

Why do I get this error?

[premiso]

<?php
session_start();

 

That is considered a whitespace hence output to the browser.

 

<?php
echo 'test';
session_start();

 

That is consider output as well, and will cause the error.

 

<?php
session_start();
echo 'test';

 

That is a valid session_start() given that there is nothing included above etc. You must[/m] have output being started somewhere or else you would not get that error, particularly on line 8 in sessions/index.php as that is what the error states:

 

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at C:\xampp\htdocs\Sessions\index.php: 8 ) in C:\xampp\htdocs\Sessions\index.php on line 10

 

Your session_start code is apparently on line 10, given that error message.

[PFMaBiSmAd]

Based on the line number where the session_start() is and where the error messages states the output is being started at, you have 7 new-lines/lines of html before the <?php tag.