Session/Storage/Handler/PdoSessionHandler.php
public function read($sessionId)
    {
        try {
            return base64_decode($this->doRead($sessionId));
        } catch (\PDOException $e) {
            $this->rollback();

            throw $e;
        }
    }
public function read($sessionId)
    {
        try {
            return base64_decode($this->doRead($sessionId));
        } catch (\PDOException $e) {
            $this->rollback();

            throw $e;
        }
    }
{@inheritdoc}