WriteSafeSessionHandlerInterface.php

<?php

namespace Drupal\Core\Session;


/**
 * Provides an interface for session handlers where writing can be disabled.
 */
interface WriteSafeSessionHandlerInterface {
    
    /**
     * Sets whether or not a session may be written to storage.
     *
     * It is not possible to enforce writing of the session data. This method is
     * only capable of forcibly disabling that session data is written to storage.
     *
     * @param bool $flag
     *   TRUE if the session is allowed to be written, FALSE otherwise.
     */
    public function setSessionWritable($flag);
    
    /**
     * Returns whether or not a session may be written to storage.
     *
     * @return bool
     *   TRUE if the session is allowed to be written, FALSE otherwise.
     */
    public function isSessionWritable();

}