[PHP 7.2] My fix for «Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in lib/internal/Magento/Framework/Session/SessionManager.php on line 129»

dmitry_fedyuk · December 30, 2017, 7:43am

magento/magento2/blob/2.2.2/lib/internal/Magento/Framework/Session/SessionManager.php#L95-L131


/**
 * @param \Magento\Framework\App\Request\Http $request
 * @param SidResolverInterface $sidResolver
 * @param ConfigInterface $sessionConfig
 * @param SaveHandlerInterface $saveHandler
 * @param ValidatorInterface $validator
 * @param StorageInterface $storage
 * @param \Magento\Framework\Stdlib\CookieManagerInterface $cookieManager
 * @param \Magento\Framework\Stdlib\Cookie\CookieMetadataFactory $cookieMetadataFactory
 * @param \Magento\Framework\App\State $appState
 * @throws \Magento\Framework\Exception\SessionException
 */
public function __construct(
    \Magento\Framework\App\Request\Http $request,
    SidResolverInterface $sidResolver,
    ConfigInterface $sessionConfig,
    SaveHandlerInterface $saveHandler,
    ValidatorInterface $validator,
    StorageInterface $storage,
    \Magento\Framework\Stdlib\CookieManagerInterface $cookieManager,
    \Magento\Framework\Stdlib\Cookie\CookieMetadataFactory $cookieMetadataFactory,
    \Magento\Framework\App\State $appState
) {
    $this->request = $request;
    $this->sidResolver = $sidResolver;
    $this->sessionConfig = $sessionConfig;
    $this->saveHandler = $saveHandler;
    $this->validator = $validator;
    $this->storage = $storage;
    $this->cookieManager = $cookieManager;
    $this->cookieMetadataFactory = $cookieMetadataFactory;
    $this->appState = $appState;


    // Enable session.use_only_cookies
    ini_set('session.use_only_cookies', '1');
    $this->start();
}

dmitry_fedyuk · December 30, 2017, 8:58am

How to fix it

Replace the lines:

github.com

magento/magento2/blob/2.2.2/lib/internal/Magento/Framework/Session/SessionManager.php#L128-L129


// Enable session.use_only_cookies
ini_set('session.use_only_cookies', '1');

with the following ones:

if (!$this->isSessionExists()) {
	// Enable session.use_only_cookies
	ini_set('session.use_only_cookies', '1');
}