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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation\Session;
/**
* Session utility functions.
*
* @author Nicolas Grekas <p@tchwork.com>
* @author Rémon van de Kamp <rpkamp@gmail.com>
*
* @internal
*/
final class SessionUtils
{
/**
* Finds the session header amongst the headers that are to be sent, removes it, and returns
* it so the caller can process it further.
*/
public static function popSessionCookie(string $sessionName, string $sessionId): ?string
{
$sessionCookie = null;
$sessionCookiePrefix = sprintf(' %s=', urlencode($sessionName));
$sessionCookieWithId = sprintf('%s%s;', $sessionCookiePrefix, urlencode($sessionId));
$otherCookies = [];
foreach (headers_list() as $h) {
if (0 !== stripos($h, 'Set-Cookie:')) {
continue;
}
if (11 === strpos($h, $sessionCookiePrefix, 11)) {
$sessionCookie = $h;
if (11 !== strpos($h, $sessionCookieWithId, 11)) {
$otherCookies[] = $h;
}
} else {
$otherCookies[] = $h;
}
}
if (null === $sessionCookie) {
return null;
}
header_remove('Set-Cookie');
foreach ($otherCookies as $h) {
header($h, false);
}
return $sessionCookie;
}
}
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