diff --git a/var/Typecho/Db/Adapter/Mysqli.php b/var/Typecho/Db/Adapter/Mysqli.php
new file mode 100644
index 00000000..89c4678f
--- /dev/null
+++ b/var/Typecho/Db/Adapter/Mysqli.php
@@ -0,0 +1,169 @@
+<?php
+if (!defined('__TYPECHO_ROOT_DIR__')) exit;
+/**
+ * Typecho Blog Platform
+ *
+ * @copyright  Copyright (c) 2008 Typecho team (http://www.typecho.org)
+ * @license    GNU General Public License 2.0
+ * @version    $Id: Mysql.php 103 2008-04-09 16:22:43Z magike.net $
+ */
+
+/**
+ * 数据库Mysql适配器
+ *
+ * @package Db
+ */
+class Typecho_Db_Adapter_Mysqli implements Typecho_Db_Adapter
+{
+    /**
+     * 数据库连接字符串标示
+     *
+     * @access private
+     * @var resource
+     */
+    private $_dbLink;
+
+    /**
+     * 判断适配器是否可用
+     *
+     * @access public
+     * @return boolean
+     */
+    public static function isAvailable()
+    {
+        return function_exists('mysqli_connect');
+    }
+
+    /**
+     * 数据库连接函数
+     *
+     * @param Typecho_Config $config 数据库配置
+     * @throws Typecho_Db_Exception
+     * @return resource
+     */
+    public function connect(Typecho_Config $config)
+    {
+
+        if ($this->_dbLink = @new MySQLi($config->host, $config->user, $config->password, $config->database, (empty($config->port) ? '' : $config->port))) {
+            if ($config->charset) {
+                $this->_dbLink->query("SET NAMES '{$config->charset}'");
+            }
+            return $this->_dbLink;
+        }
+
+        /** 数据库异常 */
+        throw new Typecho_Db_Adapter_Exception(@$this->_dbLink->error);
+    }
+
+    /**
+     * 执行数据库查询
+     *
+     * @param string $query 数据库查询SQL字符串
+     * @param mixed $handle 连接对象
+     * @param integer $op 数据库读写状态
+     * @param string $action 数据库动作
+     * @throws Typecho_Db_Exception
+     * @return resource
+     */
+    public function query($query, $handle, $op = Typecho_Db::READ, $action = NULL)
+    {
+        if ($resource = @$this->_dbLink->query($query instanceof Typecho_Db_Query ? $query->__toString() : $query)) {
+            return $resource;
+        }
+
+        /** 数据库异常 */
+        throw new Typecho_Db_Query_Exception($this->_dbLink->error, $this->_dbLink->errno);
+    }
+
+    /**
+     * 将数据查询的其中一行作为数组取出,其中字段名对应数组键值
+     *
+     * @param resource $resource 查询返回资源标识
+     * @return array
+     */
+    public function fetch($resource)
+    {
+        return $resource->fetch_assoc();
+    }
+
+    /**
+     * 将数据查询的其中一行作为对象取出,其中字段名对应对象属性
+     *
+     * @param resource $resource 查询的资源数据
+     * @return object
+     */
+    public function fetchObject($resource)
+    {
+        return $resource->fetch_object();
+    }
+
+    /**
+     * 引号转义函数
+     *
+     * @param string $string 需要转义的字符串
+     * @return string
+     */
+    public function quoteValue($string)
+    {
+        return '\'' . str_replace(array('\'', '\\'), array('\'\'', '\\\\'), $string) . '\'';
+    }
+
+    /**
+     * 对象引号过滤
+     *
+     * @access public
+     * @param string $string
+     * @return string
+     */
+    public function quoteColumn($string)
+    {
+        return '`' . $string . '`';
+    }
+
+    /**
+     * 合成查询语句
+     *
+     * @access public
+     * @param array $sql 查询对象词法数组
+     * @return string
+     */
+    public function parseSelect(array $sql)
+    {
+        if (!empty($sql['join'])) {
+            foreach ($sql['join'] as $val) {
+                list($table, $condition, $op) = $val;
+                $sql['table'] = "{$sql['table']} {$op} JOIN {$table} ON {$condition}";
+            }
+        }
+
+        $sql['limit'] = (0 == strlen($sql['limit'])) ? NULL : ' LIMIT ' . $sql['limit'];
+        $sql['offset'] = (0 == strlen($sql['offset'])) ? NULL : ' OFFSET ' . $sql['offset'];
+
+        return 'SELECT ' . $sql['fields'] . ' FROM ' . $sql['table'] .
+        $sql['where'] . $sql['group'] . $sql['having'] . $sql['order'] . $sql['limit'] . $sql['offset'];
+    }
+
+    /**
+     * 取出最后一次查询影响的行数
+     *
+     * @param resource $resource 查询的资源数据
+     * @param mixed $handle 连接对象
+     * @return integer
+     */
+    public function affectedRows($resource, $handle)
+    {
+        return $this->_dbLink->affected_rows;
+    }
+
+    /*y
+     * 取出最后一次插入返回的主键值
+     *
+     * @param resource $resource 查询的资源数据
+     * @param mixed $handle 连接对象
+     * @return integer
+     */
+    public function lastInsertId($resource, $handle)
+    {
+        return $this->_dbLink->insert_id;
+    }
+}