thinkphp 3.2里面session的redis驱动文件(可分布式)

使用方法:
将文件存放在ThinkPHP框架根目录下的Library\Think\Session\Driver\目录下


config配置参数:
//Redis Session配置
'SESSION_AUTO_START'=>  true, // 是否自动开启Session
'SESSION_TYPE'=>  'Redis', //session类型
'SESSION_PERSISTENT'    =>  1,//是否长连接(对于php来说0和1都一样)
'SESSION_CACHE_TIME'=>  1, //连接超时时间(秒)
'SESSION_EXPIRE'=>  0, //session有效期(单位:秒) 0表示永久缓存
'SESSION_PREFIX'=>  'sess_', //session前缀
'SESSION_REDIS_HOST'=>  '10.8.8.33,10.8.8.34', //分布式Redis,默认第一个为主服务器

'SESSION_REDIS_PORT'=>  '6379',       //端口,如果相同只填一个,用英文逗号分隔

'SESSION_REDIS_AUTH'    =>  'redis123',    //Redis auth认证(密钥中不能有逗号),如果相同只填一个,用英文逗号分隔

<?phpnamespace Think\Session\Driver;/** * Redis Session驱动  * 要求安装phpredis扩展：https://github.com/nicolasff/phpredis * @category   Think * @package  Session * @subpackage  Driver * @version   TP3.2~TP3.2.1  +------------------------------------------------------------------------------ */class Redis {/** * Redis句柄 */private $handler;private $get_result;public function __construct(){if ( !extension_loaded('redis') ) {            E(L('_NOT_SUPPERT_').':redis');        }        if(empty($options)) {            $options = array (                'host'          => C('SESSION_REDIS_HOST') ? C('SESSION_REDIS_HOST') : '127.0.0.1',                'port'          => C('SESSION_REDIS_PORT') ? C('SESSION_REDIS_PORT') : 6379,                'timeout'       => C('SESSION_CACHE_TIME') ? C('SESSION_CACHE_TIME') : false,                'persistent'    => C('SESSION_PERSISTENT') ? C('SESSION_PERSISTENT') : false,'auth'=> C('SESSION_REDIS_AUTH') ? C('SESSION_REDIS_AUTH') : false,            );        }$options['host'] = explode(',', $options['host']);$options['port'] = explode(',', $options['port']);$options['auth'] = explode(',', $options['auth']);foreach ($options['host'] as $key=>$value) {if (!isset($options['port'][$key])) {$options['port'][$key] = $options['port'][0];}if (!isset($options['auth'][$key])) {$options['auth'][$key] = $options['auth'][0];}}        $this->options =  $options;$expire = C('SESSION_EXPIRE');        $this->options['expire'] =  isset($expire) ? (int)$expire : (int)ini_get('session.gc_maxlifetime');;        $this->options['prefix'] =  isset($options['prefix']) ?  $options['prefix']  :   C('SESSION_PREFIX');        $this->handler  = new \Redis;}/** * 连接Redis服务端 * @access public * @param bool $is_master : 是否连接主服务器 */public function connect($is_master = true) {if ($is_master) {$i = 0;} else {$count = count($this->options['host']);if ($count == 1) {$i = 0;} else {$i = rand(1, $count - 1);//多个从服务器随机选择}}$func = $this->options['persistent'] ? 'pconnect' : 'connect';try {if ($this->options['timeout'] === false) {$result = $this->handler->$func($this->options['host'][$i], $this->options['port'][$i]);if (!$result)throw new \Think\Exception('Redis Error', 100);} else {$result = $this->handler->$func($this->options['host'][$i], $this->options['port'][$i], $this->options['timeout']);if (!$result)throw new \Think\Exception('Redis Error', 101);}if ($this->options['auth'][$i]) {$result = $this->handler->auth($this->options['auth'][$i]);if (!$result) {throw new \Think\Exception('Redis Error', 102);}}} catch ( \Exception $e ) {exit('Error Message:'.$e->getMessage().'<br>Error Code:'.$e->getCode().'');}}/**  +---------------------------------------------------------- * 打开Session   +---------------------------------------------------------- * @access public   +---------------------------------------------------------- * @param string $savePath  * @param mixed $sessName    +---------------------------------------------------------- */public function open($savePath, $sessName) {return true;}/**  +---------------------------------------------------------- * 关闭Session   +---------------------------------------------------------- * @access public   +---------------------------------------------------------- */public function close() {if ($this->options['persistent'] == 'pconnect') {$this->handler->close();}return true;}/**  +---------------------------------------------------------- * 读取Session   +---------------------------------------------------------- * @access public   +---------------------------------------------------------- * @param string $sessID   +---------------------------------------------------------- */public function read($sessID) {$this->connect(0);$this->get_result = $this->handler->get($this->options['prefix'].$sessID);        return $this->get_result;}/**  +---------------------------------------------------------- * 写入Session   +---------------------------------------------------------- * @access public   +---------------------------------------------------------- * @param string $sessID  * @param String $sessData    +---------------------------------------------------------- */public function write($sessID, $sessData) {if (!$sessData || $sessData == $this->get_result) {return true;}$this->connect(1);        $expire  =  $this->options['expire'];        $sessID   =   $this->options['prefix'].$sessID;        if(is_int($expire) && $expire > 0) {            $result = $this->handler->setex($sessID, $expire, $sessData);$re = $result ? 'true' : 'false';        }else{            $result = $this->handler->set($sessID, $sessData);$re = $result ? 'true' : 'false';        }        return $result;}/**  +---------------------------------------------------------- * 删除Session   +---------------------------------------------------------- * @access public   +---------------------------------------------------------- * @param string $sessID   +---------------------------------------------------------- */public function destroy($sessID) {$this->connect(1);        return $this->handler->delete($this->options['prefix'].$sessID);}/**  +---------------------------------------------------------- * Session 垃圾回收  +---------------------------------------------------------- * @access public   +---------------------------------------------------------- * @param string $sessMaxLifeTime   +---------------------------------------------------------- */public function gc($sessMaxLifeTime) {return true;}/**  +---------------------------------------------------------- * 打开Session   +---------------------------------------------------------- * @access public   +---------------------------------------------------------- * @param string $savePath  * @param mixed $sessName    +---------------------------------------------------------- */public function execute() {session_set_save_handler(array(&$this, "open"),array(&$this, "close"),array(&$this, "read"),array(&$this, "write"),array(&$this, "destroy"),array(&$this, "gc"));}public function __destruct() {if ($this->options['persistent'] == 'pconnect') {$this->handler->close();}session_write_close();}}