Storing php sessions in redis as json, read the session

Question

I'm storing my php sessions in redis as json string to share them with node.js like it is done here:

http://simplapi.wordpress.com/2012/04/13/php-and-node-js-session-share-redi/

What I don't like is that these functions store the sessions on disk and in redis. I just want them in redis. As json.

I thought it would be easy to change this and I guess it is but I don't know how.

I can't use session_encode(); on a specific variable. Do i need to serialize unserialze? What format do I have to return for the read function?

public function read($id) {

    $id = $this->_prefix . $id;

    try {

        $r = $this->__rc
            ->multi()
            ->get($id)
            ->expire($id, $this->ttl)
            ->exec();

    } catch (\RedisException $e) { return false; }


    $tmp      = $_SESSION;
    $_SESSION = json_decode( $r[0], true );

    if( isset( $_SESSION ) && ! empty( $_SESSION ) && $_SESSION != null ){

        $new_data = session_encode();
        $_SESSION = $tmp;
        return $new_data;

    } 

    else{ 

        return ''; 

    }

}

public function write($id, $data) {

    $tmp = $_SESSION;
    session_decode($data);
    $new_data = $_SESSION;
    $_SESSION = $tmp;

    $id = $this->_prefix . $id;

    try{

        $this->__rc
            ->multi()
            ->set( $id, json_encode($new_data) )
            ->expire($id, $this->ttl)
            ->exec();

    } catch (\RedisException $e) { return false; }

    return true;

}

Answer 1

为了仅将会话保存在Redis中而不保存在磁盘上，您需要更改将会话存储在php.ini中的设置，例如session_save路径。