Pass $_SESSION variables to included file

Question

i have a first PHP file: /home/www/subdomain1.domain.tld/file.php

<?php
    session_start();
    $_SESSION['foo']='bar';   
    include "/home/www/subdomain2.domain.tld/foo2.php";
 ?>

and /home/www/subdomain2.domain.tld/foo2.php:

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

The "include" in the first file generates a "500 Internal Server Error", i think it's because session variables are not passed to included files, how can i fix that?

Thank you Alex

EDIT: I must use session variables in order to use these variables on every php file on subdomain2.

Answer 1

You don't need to use sessions when including a file. It is all the same request with the same namespace.

file.php:

$foo = 'bar';

include 'foo2.php';

foo2.php

echo $foo; // returns 'bar'

Answer 2

You shouldn't be starting the session in the second file. Since the session was started in file.php, it is already available to foo2.php.

The error may be because PHP output a warning that the session was already started.

For debugging, add error_reporting(E_ALL); ini_set('display_errors', 1); error_reporting(E_ALL); ini_set('display_errors', 1); to the beginning of your first PHP script.

You should just be able to do:

file.php

<?php
    session_start();
    $_SESSION['foo']='bar';   
    include "/home/www/subdomain2.domain.tld/foo2.php";

foo2.php

i have a first PHP file: /home/www/subdomain1.domain.tld/file.php

and /home/www/subdomain2.domain.tld/foo2.php:

<?php 
// session_start();  // remove, do not need this here
echo $_SESSION['foo'];