增加session redis驱动

library/think/session/driver/Redis.php

@@ -0,0 +1,90 @@
+<?php
+namespace think\session\driver;
+
+use think\session\Driver;
+use think\Config;
+
+class Redis extends Driver
+{
+    protected $handler      = null;
+    protected $config       = [
+        'host'          => '127.0.0.1', // 主机
+        'port'          => 6379,        // 端口
+        'password'      => '',          // 密码
+        'expire'        => 3600,        // 有效期
+        'timeout'       => false,       // 超时时间
+        'persistent'    => 0,           // 是否长连接
+        'session_name'  => '',          // memcache key前缀
+    ];
+
+    /**
+     * 打开Session 
+     * @access public 
+     * @param string $savePath 
+     * @param mixed $sessName  
+     */
+    public function open($savePath, $sessName) {
+        // 检测php环境
+        if (!extension_loaded('redis')) {
+            throw new Exception('_NOT_SUPPERT_:redis');
+        }
+        $this->handler  = new \Redis;
+        // 建立连接
+        $func          = $this->config['persistent'] ? 'pconnect' : 'connect';
+        false === $this->config['timeout'] ?
+        $this->handler->$func($this->config['host'], $this->config['port']) :
+        $this->handler->$func($this->config['host'], $this->config['port'], $this->config['timeout']);
+        if ('' != $this->config['password']) {
+            $this->handler->auth($this->config['password']);
+        }
+        return true;
+    }
+
+    /**
+     * 关闭Session 
+     * @access public 
+     */
+    public function close() {
+        $this->gc(ini_get('session.gc_maxlifetime'));
+        $this->handler->close();
+        $this->handler  = null;
+        return true;
+    }
+
+    /**
+     * 读取Session 
+     * @access public 
+     * @param string $sessID 
+     */
+    public function read($sessID) {
+        return $this->handler->get($this->config['session_name'].$sessID);
+    }
+
+    /**
+     * 写入Session 
+     * @access public 
+     * @param string $sessID 
+     * @param String $sessData  
+     */
+    public function write($sessID, $sessData) {
+        return $this->handler->set($this->config['session_name'].$sessID, $sessData, 0, $this->config['expire']);
+    }
+
+    /**
+     * 删除Session 
+     * @access public 
+     * @param string $sessID 
+     */
+    public function destroy($sessID) {
+        return $this->handler->delete($this->config['session_name'].$sessID);
+    }
+
+    /**
+     * Session 垃圾回收
+     * @access public 
+     * @param string $sessMaxLifeTime 
+     */
+    public function gc($sessMaxLifeTime) {
+        return true;
+    }
+}