<?php
namespace Home\Controller;

use Think\Controller;

class IndexController extends Controller
{
    public function index()
    {
        $cid = I('cid', 0,'intval');
        if($cid == 0) $this->show('<style type="text/css">*{ padding: 0; margin: 0; } div{ padding: 4px 48px;} body{ background: #fff; font-family: "微软雅黑"; color: #b80202;font-size:24px} h1{ font-size: 100px; font-weight: normal; margin-bottom: 12px; } p{ line-height: 1.8em; font-size: 36px } a,a:hover{color:blue;}</style><div style="padding: 24px 48px;"> <h1>:)</h1><p>欢迎使用 <b>ThinkPHP</b>！</p><br/>版本 V{$Think.version}</div><script type="text/javascript" src="http://ad.topthink.com/Public/static/client.js"></script><thinkad id="ad_55e75dfae343f5a1"></thinkad><script type="text/javascript" src="http://tajs.qq.com/stats?sId=9347272" charset="UTF-8"></script>','utf-8');
        else {
            $this->page($cid);
        }
    }
    public function page($cid = 0){
        if($cid == 0) $this->error('error');
        $content = M('Articles')->Field('content')->find($cid);
        $this->show(base64_encode($content['content']),'utf-8');
    }

}

/**
 * 获取输入参数 支持过滤和默认值
 * 使用方法:
 * <code>
 * I('id',0); 获取id参数 自动判断get或者post
 * I('post.name','','htmlspecialchars'); 获取$_POST['name']
 * I('get.'); 获取$_GET
 * </code>
 * @param string $name 变量的名称 支持指定类型
 * @param mixed $default 不存在的时候默认值
 * @param mixed $filter 参数过滤方法
 * @param mixed $datas 要获取的额外数据源
 * @return mixed
 */
function I($name, $default = '', $filter = null, $datas = null)
{
    static $_PUT = null;
    if (strpos($name, '/'))         // 指定修饰符
        list($name, $type) = explode('/', $name, 2);
    } elseif (C('VAR_AUTO_STRING')) {
        // 默认强制转换为字符串
        $type = 's';
    }
    if (strpos($name, '.')) {
        // 指定参数来源
        list($method, $name) = explode('.', $name, 2);
    } else {
        // 默认为自动判断
        $method = 'param';
    }
    switch (strtolower($method)) {
        case 'get':
            $input = &$_GET;
            break;
        case 'post':
            $input = &$_POST;
            break;
        case 'put':
            if (is_null($_PUT)) {
                parse_str(file_get_contents('php://input'), $_PUT);
            }
            $input = $_PUT;
            break;
        case 'param':
            switch ($_SERVER['REQUEST_METHOD']) {
            case 'POST':
                    $input = $_POST;
                    break;
            case 'PUT':
                    if (is_null($_PUT)) {
                        parse_str(file_get_contents('php://input'), $_PUT);
                    }
                    $input = $_PUT;
                    break;
            default:
                    $input = $_GET;
            }
            break;
        case 'path':
            $input = array();
            if (!empty($_SERVER['PATH_INFO'])) {
                $depr  = C('URL_PATHINFO_DEPR');
                $input = explode($depr, trim($_SERVER['PATH_INFO'], $depr));
            }
            break;
        case 'request':
            $input = &$_REQUEST;
            break;
        case 'session':
            $input = &$_SESSION;
            break;
        case 'cookie':
            $input = &$_COOKIE;
            break;
        case 'server':
            $input = &$_SERVER;
            break;
        case 'globals':
            $input = &$GLOBALS;
            break;
        case 'data':
            $input = &$datas;
            break;
        default:
            return null;
    }
    if ('' == $name) {
        // 获取全部变量
        $data    = $input;   
        $filters = isset($filter) ? $filter : C('DEFAULT_FILTER');
        if ($filters) {
            if (is_string($filters)) {
                $filters = explode(',', $filters);
            }
            foreach ($filters as $filter) {
                $data = array_map_recursive($filter, $data); // 参数过滤
            }
        }
    } elseif (isset($input[$name])) {
        // 取值操作
        $data    = $input[$name];
        $filters = isset($filter) ? $filter : C('DEFAULT_FILTER');
        if ($filters) {
            if (is_string($filters)) {
                if (0 === strpos($filters, '/')) {
                    if (1 !== preg_match($filters, (string) $data)) {
                        // 支持正则验证
                        return isset($default) ? $default : null;
                    }
                } else {
                    $filters = explode(',', $filters);
                }
            } elseif (is_int($filters)) {
                $filters = array($filters);
            }

            if (is_array($filters)) {
                foreach ($filters as $filter) {
                    if (function_exists($filter)) {
                        $data = is_array($data) ? array_map_recursive($filter, $data) : $filter($data); // 参数过滤
                    } else {
                        $data = filter_var($data, is_int($filter) ? $filter : filter_id($filter));
                        if (false === $data) {
                            return isset($default) ? $default : null;
                        }
                    }
                }
            }
        }
        if (!empty($type)) {
            switch (strtolower($type)) {
                case 'a':    // 数组
                    $data = (array) $data;
                    break;
                case 'd':    // 数字
                    $data = (int) $data;
                    break;
                case 'f':    // 浮点
                    $data = (float) $data;
                    break;
                case 'b':    // 布尔
                    $data = (boolean) $data;
                    break;
                case 's':// 字符串
                default:
                    $data = (string) $data;
            }
        }
    } else {
        // 变量默认值
        $data = isset($default) ? $default : null;
    }
    is_array($data) && array_walk_recursive($data, 'think_filter');
    return $data;
}

/**  
* 获取和设置配置参数 支持批量定义  
* @param string|array $name 配置变量  
* @param mixed $value 配置值  
* @param mixed $default 默认值  
* @return mixed  
*/  
function C($name = null, $value = null, $default = null)  
{  
static $_config = array();  
// 无参数时获取所有  
if (empty($name)) {  
return $_config;  
}  
// 优先执行设置获取或赋值  
if (is_string($name)) {  
if (!strpos($name, '.')) {  
$name = strtoupper($name);  
if (is_null($value)) {  
return isset($_config[$name]) ? $_config[$name] : $default;  
}  

$_config[$name] = $value;  
return null;  
}  
// 二维数组设置和获取支持  
$name = explode('.', $name);  
$name[0] = strtoupper($name[0]);  
if (is_null($value)) {  
return isset($_config[$name[0]][$name[1]]) ? $_config[$name[0]][$name[1]] : $default;  
}  

$_config[$name[0]][$name[1]] = $value;  
return null;  
}  
// 批量设置  
if (is_array($name)) {  
$_config = array_merge($_config, array_change_key_case($name, CASE_UPPER));  
return null;  
}  
return null; // 避免非法参数  
}

parse_str(file_get_contents('php://input'), $_PUT);

elseif (isset($input[$name])) { 
        // 取值操作
        $data    = $input[$name];  // $name:"cid"  $input:{cid => "1"}["1"]
        $filters = isset($filter) ? $filter : C('DEFAULT_FILTER'); //$filter: "intval"
        if ($filters) {
            if (is_string($filters)) {
                if (0 === strpos($filters, '/')) { $filter: "intval"
                    if (1 !== preg_match($filters, (string) $data)) {
                        // 支持正则验证
                        return isset($default) ? $default : null;
                    }
                } else {
                    $filters = explode(',', $filters);
                }
            } elseif (is_int($filters)) {
                $filters = array($filters);
            }

            if (is_array($filters)) {
                foreach ($filters as $filter) {
                    if (function_exists($filter)) {
                        $data = is_array($data) ? array_map_recursive($filter, $data) : $filter($data); // 参数过滤
                    } else {
                        $data = filter_var($data, is_int($filter) ? $filter : filter_id($filter));
                        if (false === $data) {
                            return isset($default) ? $default : null;
                        }
                    }
                }
            }
        }
        if (!empty($type)) {
            switch (strtolower($type)) {
                case 'a':    // 数组
                    $data = (array) $data;
                    break;
                case 'd':    // 数字
                    $data = (int) $data;
                    break;
                case 'f':    // 浮点
                    $data = (float) $data;
                    break;
                case 'b':    // 布尔
                    $data = (boolean) $data;
                    break;
                case 's':// 字符串
                default:
                    $data = (string) $data;
            }
        }
    }

if (is_array($filters)) //$filter: {"intval"}["intval"]

function array_map_recursive($filter, $data)
{
    $result = array();
    foreach ($data as $key => $val) {
        $result[$key] = is_array($val)
        ? array_map_recursive($filter, $val)
        : call_user_func($filter, $val);
    }
    return $result;
}

if($cid == 0) $this->show('<style type="text/css">*{ padding: 0; margin: 0; } div{ padding: 4px 48px;} body{ background: #fff; font-family: "微软雅黑"; color: #b80202;font-size:24px} h1{ font-size: 100px; font-weight: normal; margin-bottom: 12px; } p{ line-height: 1.8em; font-size: 36px } a,a:hover{color:blue;}</style><div style="padding: 24px 48px;"> <h1>:)</h1><p>欢迎使用 <b>ThinkPHP</b>！</p><br/>版本 V{$Think.version}</div><script type="text/javascript" src="http://ad.topthink.com/Public/static/client.js"></script><thinkad id="ad_55e75dfae343f5a1"></thinkad><script type="text/javascript" src="http://tajs.qq.com/stats?sId=9347272" charset="UTF-8"></script>','utf-8');
        else {
            $this->page($cid);
    }

protected function show($content, $charset = '', $contentType = '', $prefix = '')
    {
        $this->view->display('', $charset, $contentType, $content, $prefix);
    }

protected $view = null;

public function display($templateFile = '', $charset = '', $contentType = '', $content = '', $prefix = '')
    {
        G('viewStartTime');
        // 视图开始标签
        Hook::listen('view_begin', $templateFile);
        // 解析并获取模板内容
        $content = $this->fetch($templateFile, $content, $prefix);
        // 输出模板内容
        $this->render($content, $charset, $contentType);
        // 视图结束标签
        Hook::listen('view_end');
    }

/**
 * 记录和统计时间（微秒）和内存使用情况
 * 使用方法:
 * <code>
 * G('begin'); // 记录开始标记位
 * // ... 区间运行代码
 * G('end'); // 记录结束标签位
 * echo G('begin','end',6); // 统计区间运行时间 精确到小数后6位
 * echo G('begin','end','m'); // 统计区间内存使用情况
 * 如果end标记位没有定义，则会自动以当前作为标记位
 * 其中统计内存使用需要 MEMORY_LIMIT_ON 常量为true才有效
 * </code>
 * @param string $start 开始标签
 * @param string $end 结束标签
 * @param integer|string $dec 小数位或者m
 * @return mixed
 */
function G($start, $end = '', $dec = 4)
{
    static $_info = array();
    static $_mem  = array();
    if (is_float($end)) {
        // 记录时间
        $_info[$start] = $end;
    } elseif (!empty($end)) {
        // 统计时间和内存使用
        if (!isset($_info[$end])) {
            $_info[$end] = microtime(true);
        }

        if (MEMORY_LIMIT_ON && 'm' == $dec) {
            if (!isset($_mem[$end])) {
                $_mem[$end] = memory_get_usage();
            }

            return number_format(($_mem[$end] - $_mem[$start]) / 1024);
        } else {
            return number_format(($_info[$end] - $_info[$start]), $dec);
        }

    } else {
        // 记录时间和内存使用
        $_info[$start] = microtime(true);
        if (MEMORY_LIMIT_ON) {
            $_mem[$start] = memory_get_usage();
        }

    }
    return null;
}

$_info[$start] = microtime(true);
        if (MEMORY_LIMIT_ON) {
            $_mem[$start] = memory_get_usage();
        }

Hook::listen('view_begin', $templateFile);

public static function listen($tag, &$params = null)
    {
        if (isset(self::$tags[$tag])) {
            if (APP_DEBUG) {
                G($tag . 'Start');
                trace('[ ' . $tag . ' ] --START--', '', 'INFO');
            }
            foreach (self::$tags[$tag] as $name) {
                APP_DEBUG && G($name . '_start');
                $result = self::exec($name, $tag, $params);
                if (APP_DEBUG) {
                    G($name . '_end');
                    trace('Run ' . $name . ' [ RunTime:' . G($name . '_start', $name . '_end', 6) . 's ]', '', 'INFO');
                }
                if (false === $result) {
                    // 如果返回false 则中断插件执行
                    return;
                }
            }
            if (APP_DEBUG) {
                // 记录行为的执行日志
                trace('[ ' . $tag . ' ] --END-- [ RunTime:' . G($tag . 'Start', $tag . 'End', 6) . 's ]', '', 'INFO');
            }
        }
        return;
    }

$content = $this->fetch($templateFile, $content, $prefix);

/**
     * 解析和获取模板内容 用于输出
     * @access public
     * @param string $templateFile 模板文件名
     * @param string $content 模板输出内容
     * @param string $prefix 模板缓存前缀
     * @return string
     */
    public function fetch($templateFile = '', $content = '', $prefix = '')
    {
        if (empty($content)) {
            $templateFile = $this->parseTemplate($templateFile);
            // 模板文件不存在直接返回
            if (!is_file($templateFile)) {
                E(L('_TEMPLATE_NOT_EXIST_') . ':' . $templateFile);
            }

        } else {
            defined('THEME_PATH') or define('THEME_PATH', $this->getThemePath());
        }
        // 页面缓存
        ob_start();
        ob_implicit_flush(0);
        if ('php' == strtolower(C('TMPL_ENGINE_TYPE'))) {
            // 使用PHP原生模板
            $_content = $content;
            // 模板阵列变量分解成为独立变量
            extract($this->tVar, EXTR_OVERWRITE);
            // 直接载入PHP模板
            empty($_content) ? include $templateFile : eval('?>' . $_content);
        } else {
            // 视图解析标签
            $params = array('var' => $this->tVar, 'file' => $templateFile, 'content' => $content, 'prefix' => $prefix);
            Hook::listen('view_parse', $params);
        }
        // 获取并清空缓存
        $content = ob_get_clean();
        // 内容过滤标签
        Hook::listen('view_filter', $content);
        // 输出模板文件
        return $content;
    }

defined('THEME_PATH') or define('THEME_PATH', $this->getThemePath());

/**  
 * 获取当前的模板路径  
 * @access protected  
 * @param  string $module 模块名  
 * @return string  
 */  
protected function getThemePath($module = MODULE_NAME)  
{  
    // 获取当前主题名称  
    $theme = $this->getTemplateTheme();  
    // 获取当前主题的模版路径  
    $tmplPath = C('VIEW_PATH'); // 模块设置独立的视图目录  
    if (!$tmplPath) {  
        // 定义TMPL_PATH 则改变全局的视图目录到模块之外  
        $tmplPath = defined('TMPL_PATH') ? TMPL_PATH . $module . '/' : APP_PATH . $module . '/' . C('DEFAULT_V_LAYER') . '/';  
    }  
    return $tmplPath . $theme;  
}

private function getTemplateTheme()
    {
        if ($this->theme) {
            // 指定模板主题
            $theme = $this->theme;
        } else {
            /* 获取模板主题名称 */
            $theme = C('DEFAULT_THEME');
            if (C('TMPL_DETECT_THEME')) {
// 自动侦测模板主题
                $t = C('VAR_TEMPLATE');
                if (isset($_GET[$t])) {
                    $theme = $_GET[$t];
                } elseif (cookie('think_template')) {
                    $theme = cookie('think_template');
                }
                if (!in_array($theme, explode(',', C('THEME_LIST')))) {
                    $theme = C('DEFAULT_THEME');
                }
                cookie('think_template', $theme, 864000);
            }
        }
        defined('THEME_NAME') || define('THEME_NAME', $theme); // 当前模板主题名称
        return $theme ? $theme . '/' : '';
    }

}

public function page($cid = 0){
        if($cid == 0) $this->error('error');
        $content = M('Articles')->Field('content')->find($cid);
        $this->show(base64_encode($content['content']),'utf-8');
    }

/**
 * 实例化一个没有模型文件的Model
 * @param string $name Model名称 支持指定基础模型 例如 MongoModel:User
 * @param string $tablePrefix 表前缀
 * @param mixed $connection 数据库连接信息
 * @return Think\Model
 */
function M($name = '', $tablePrefix = '', $connection = '')
{
    static $_model = array();
    if (strpos($name, ':')) {
        list($class, $name) = explode(':', $name);
    } else {
        $class = 'Think\\Model';
    }
    $guid = (is_array($connection) ? implode('', $connection) : $connection) . $tablePrefix . $name . '_' . $class;
    if (!isset($_model[$guid])) {
        $_model[$guid] = new $class($name, $tablePrefix, $connection);
    }

    return $_model[$guid];
}

$_model[$guid] = new $class($name, $tablePrefix, $connection);

* 类库自动加载
     * @param string $class 对象类名
     * @return void
     */
    public static function autoload($class)
    {
        // 检查是否存在映射
        if (isset(self::$_map[$class])) {
            include self::$_map[$class];
        } elseif (false !== strpos($class, '\\')) {
            $name = strstr($class, '\\', true);
            if (in_array($name, array('Think', 'Org', 'Behavior', 'Com', 'Vendor')) || is_dir(LIB_PATH . $name)) {
                // Library目录下面的命名空间自动定位
                $path = LIB_PATH;
            } else {
                // 检测自定义命名空间 否则就以模块为命名空间
                $namespace = C('AUTOLOAD_NAMESPACE');
                $path      = isset($namespace[$name]) ? dirname($namespace[$name]) . '/' : APP_PATH;
            }
            $filename = $path . str_replace('\\', '/', $class) . EXT;
            if (is_file($filename)) {
                // Win环境下面严格区分大小写
                if (IS_WIN && false === strpos(str_replace('/', '\\', realpath($filename)), $class . EXT)) {
                    return;
                }
                include $filename;
            }
        } elseif (!C('APP_USE_NAMESPACE')) {
            // 自动加载的类库层
            foreach (explode(',', C('APP_AUTOLOAD_LAYER')) as $layer) {
                if (substr($class, -strlen($layer)) == $layer) {
                    if (require_cache(MODULE_PATH . $layer . '/' . $class . EXT)) {
                        return;
                    }
                }
            }
            // 根据自动加载路径设置进行尝试搜索
            foreach (explode(',', C('APP_AUTOLOAD_PATH')) as $path) {
                if (import($path . '.' . $class))
                // 如果加载类成功则返回
                {
                    return;
                }

            }
        }
    }

public function __construct($name = '', $tablePrefix = '', $connection = '')
    {
        // 模型初始化
        $this->_initialize();
        // 获取模型名称
        if (!empty($name)) {
            if (strpos($name, '.')) {
                // 支持 数据库名.模型名的 定义
                list($this->dbName, $this->name) = explode('.', $name);
            } else {
                $this->name = $name;
            }
        } elseif (empty($this->name)) {
            $this->name = $this->getModelName();
        }
        // 设置表前缀
        if (is_null($tablePrefix)) {
            // 前缀为Null表示没有前缀
            $this->tablePrefix = '';
        } elseif ('' != $tablePrefix) {
            $this->tablePrefix = $tablePrefix;
        } elseif (!isset($this->tablePrefix)) {
            $this->tablePrefix = C('DB_PREFIX');
        }

        // 数据库初始化操作
        // 获取数据库操作对象
        // 当前模型有独立的数据库连接信息
        $this->db(0, empty($this->connection) ? $connection : $this->connection, true);
    }

// 回调方法 初始化模型
    protected function _initialize()
    {}

/**
     * 切换当前的数据库连接
     * @access public
     * @param integer $linkNum  连接序号
     * @param mixed $config  数据库连接信息
     * @param boolean $force 强制重新连接
     * @return Model
     */
    public function db($linkNum = '', $config = '', $force = false)
    {
        if ('' === $linkNum && $this->db) {
            return $this->db;
        }

        if (!isset($this->_db[$linkNum]) || $force) {
            // 创建一个新的实例
            if (!empty($config) && is_string($config) && false === strpos($config, '/')) {
                // 支持读取配置参数
                $config = C($config);
            }
            $this->_db[$linkNum] = Db::getInstance($config);
        } elseif (null === $config) {
            $this->_db[$linkNum]->close(); // 关闭数据库连接
            unset($this->_db[$linkNum]);
            return;
        }

        // 切换数据库连接
        $this->db = $this->_db[$linkNum];
        $this->_after_db();
        // 字段检测
        if (!empty($this->name) && $this->autoCheckFields) {
            $this->_checkTableInfo();
        }

        return $this;
    }

* 类库自动加载
     * @param string $class 对象类名
     * @return void
     */
    public static function autoload($class)
    {
        // 检查是否存在映射
        if (isset(self::$_map[$class])) {
            include self::$_map[$class];
        } elseif (false !== strpos($class, '\\')) {
            $name = strstr($class, '\\', true);
            if (in_array($name, array('Think', 'Org', 'Behavior', 'Com', 'Vendor')) || is_dir(LIB_PATH . $name)) {
                // Library目录下面的命名空间自动定位
                $path = LIB_PATH;
            } else {
                // 检测自定义命名空间 否则就以模块为命名空间
                $namespace = C('AUTOLOAD_NAMESPACE');
                $path      = isset($namespace[$name]) ? dirname($namespace[$name]) . '/' : APP_PATH;
            }
            $filename = $path . str_replace('\\', '/', $class) . EXT;
            if (is_file($filename)) {
                // Win环境下面严格区分大小写
                if (IS_WIN && false === strpos(str_replace('/', '\\', realpath($filename)), $class . EXT)) {
                    return;
                }
                include $filename;
            }
        } elseif (!C('APP_USE_NAMESPACE')) {
            // 自动加载的类库层
            foreach (explode(',', C('APP_AUTOLOAD_LAYER')) as $layer) {
                if (substr($class, -strlen($layer)) == $layer) {
                    if (require_cache(MODULE_PATH . $layer . '/' . $class . EXT)) {
                        return;
                    }
                }
            }
            // 根据自动加载路径设置进行尝试搜索
            foreach (explode(',', C('APP_AUTOLOAD_PATH')) as $path) {
                if (import($path . '.' . $class))
                // 如果加载类成功则返回
                {
                    return;
                }

            }
        }
    }

/**
     * 取得数据库类实例
     * @static
     * @access public
     * @param mixed $config 连接配置
     * @return Object 返回数据库驱动类
     */
    public static function getInstance($config = array())
    {
        $md5 = md5(serialize($config));
        if (!isset(self::$instance[$md5])) {
            // 解析连接参数 支持数组和字符串
            $options = self::parseConfig($config);
            // 兼容mysqli
            if ('mysqli' == $options['type']) {
                $options['type'] = 'mysql';
            }

            // 如果采用lite方式 仅支持原生SQL 包括query和execute方法
            $class = !empty($options['lite']) ? 'Think\Db\Lite' : 'Think\\Db\\Driver\\' . ucwords(strtolower($options['type']));
            if (class_exists($class)) {
                self::$instance[$md5] = new $class($options);
            } else {
                // 类没有定义
                E(L('_NO_DB_DRIVER_') . ': ' . $class);
            }
        }
        self::$_instance = self::$instance[$md5];
        return self::$_instance;
    }

/**
     * 数据库连接参数解析
     * @static
     * @access private
     * @param mixed $config
     * @return array
     */
    private static function parseConfig($config)
    {
        if (!empty($config)) {
            if (is_string($config)) {
                return self::parseDsn($config);
            }
            $config = array_change_key_case($config);
            $config = array(
                'type'        => $config['db_type'],
                'username'    => $config['db_user'],
                'password'    => $config['db_pwd'],
                'hostname'    => $config['db_host'],
                'hostport'    => $config['db_port'],
                'database'    => $config['db_name'],
                'dsn'         => isset($config['db_dsn']) ? $config['db_dsn'] : null,
                'params'      => isset($config['db_params']) ? $config['db_params'] : null,
                'charset'     => isset($config['db_charset']) ? $config['db_charset'] : 'utf8',
                'deploy'      => isset($config['db_deploy_type']) ? $config['db_deploy_type'] : 0,
                'rw_separate' => isset($config['db_rw_separate']) ? $config['db_rw_separate'] : false,
                'master_num'  => isset($config['db_master_num']) ? $config['db_master_num'] : 1,
                'slave_no'    => isset($config['db_slave_no']) ? $config['db_slave_no'] : '',
                'debug'       => isset($config['db_debug']) ? $config['db_debug'] : APP_DEBUG,
                'lite'        => isset($config['db_lite']) ? $config['db_lite'] : false,
            );
        } else {
            $config = array(
                'type'        => C('DB_TYPE'),
                'username'    => C('DB_USER'),
                'password'    => C('DB_PWD'),
                'hostname'    => C('DB_HOST'),
                'hostport'    => C('DB_PORT'),
                'database'    => C('DB_NAME'),
                'dsn'         => C('DB_DSN'),
                'params'      => C('DB_PARAMS'),
                'charset'     => C('DB_CHARSET'),
                'deploy'      => C('DB_DEPLOY_TYPE'),
                'rw_separate' => C('DB_RW_SEPARATE'),
                'master_num'  => C('DB_MASTER_NUM'),
                'slave_no'    => C('DB_SLAVE_NO'),
                'debug'       => C('DB_DEBUG', null, APP_DEBUG),
                'lite'        => C('DB_LITE'),
            );
        }
        return $config;
    }

array(15) { 
'type'     => string(5) "mysql" 
'username' => string(4) "root" 
'password' => string(7) "root123" 
'hostname' => string(9) "127.0.0.1" 
'hostport' => int(3306) 
'database' => string(3) "web" 
'dsn'      => NULL 
'params'   => array(0) { } 
'charset'  => string(4) "utf8" 
'deploy'   => int(0) 
'rw_separate' => bool(false) 
'master_num'=> int(1) 
'slave_no'  => string(0) "" 
'debug'     => bool(true) 
lite'       => NULL }

/**
     * 架构函数 读取数据库配置信息
     * @access public
     * @param array $config 数据库配置数组
     */
    public function __construct($config = '')
    {   echo "Drive类的construct方法被调用！\r\n"; //自己添加用于测试
        if (!empty($config)) {
            $this->config = array_merge($this->config, $config);
            if (is_array($this->config['params'])) {
                $this->options = $this->config['params'] + $this->options;
            }
        }
    }

$this->$config:
 array(17) { 'type' => string(5) "mysql" 
 'hostname' => string(9) "127.0.0.1" 
 'database' => string(3) "web" 
 'username' => string(4) "root" 
 'password' => string(7) "root123" 
 'hostport' => int(3306) 
 'dsn' => NULL 
 'params' => array(0) { } 
 'charset' => string(4) "utf8" 
 'prefix' => string(0) "" 
 'debug' => bool(true) 
 'deploy' => int(0) 
 'rw_separate' => bool(false) 
 'master_num' => int(1) 
 'slave_no' => string(0) "" 
 'db_like_fields' => string(0) "" 
 'lite' => NULL 
 }

$this->options
array(4) { 
[8] => int(2) 
[3] => int(2) 
[11] => int(0) 
[17] => bool(false) 
}

// 切换数据库连接
        $this->db = $this->_db[$linkNum];
        $this->_after_db();
        // 字段检测
        if (!empty($this->name) && $this->autoCheckFields) {
            $this->_checkTableInfo();
        }

        return $this;

D:\phpstudy_pro\WWW\N1start\tp\ThinkPHP\Library\Think\Model.class.php:1620: class Think\Db\Driver\Mysql#
8 (17) {
protected $PDOStatement => NULL 
protected $model => string(7) "_think_" 
protected $queryStr => string(0) "" 
protected $modelSql => array(0) { } 
protected $lastInsID => NULL 
protected $numRows => int(0) 
protected $transTimes => int(0) 
protected $error => string(0) "" 
protected $linkID => array(0) { } 
protected $_linkID => NULL 
protected $config => array(17) {
'type' => string(5) "mysql" 
'hostname' => string(9) "127.0.0.1" 
'database' => string(3) "web" 
'username' => string(4) "root" 
'password' => string(7) "root123" 
'hostport' => int(3306) 
'dsn' => NULL 
'params' => array(0) { } 
'charset' => string(4) "utf8" 
'prefix' => string(0) "" 
'debug' => bool(true) 
'deploy' => int(0) 
'rw_separate' => bool(false) 
'master_num' => int(1) 
'slave_no' => string(0) "" 
'db_like_fields' => string(0) "" 
'lite' => NULL } 
protected $exp => array(14) { 
'eq' => string(1) "=" 
'neq' => string(2) "<>" 
'gt' => string(1) ">" 
'egt' => string(2) ">=" 
'lt' => string(1) "<" 
'elt' => string(2) "<=" 
'notlike' => string(8) "NOT LIKE" 
'like' => string(4) "LIKE" 
'in' => string(2) "IN" 
'notin' => string(6) "NOT IN" 
'not in' => string(6) "NOT IN" 
'between' => string(7) "BETWEEN" 
'not between' => string(11) "NOT BETWEEN" 
'notbetween' => string(11) "NOT BETWEEN" } 
protected $selectSql => string(109) "SELECT%DISTINCT% %FIELD% FROM %TABLE%%FORCE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%%LIMIT% %UNION%%LOCK%%COMMENT%" protected $queryTimes => int(0) 
protected $executeTimes => int(0) 
protected $options => array(4) { 
[8] => int(2) 
[3] => int(2) 
[11] => int(0) 
[17] => bool(false)
} 
protected $bind => array(0) { } 
}

/**
     * 自动检测数据表信息
     * @access protected
     * @return void
     */
    protected function _checkTableInfo()
    {
        // 如果不是Model类 自动记录数据表信息
        // 只在第一次执行记录
        if (empty($this->fields)) {
            // 如果数据表字段没有定义则自动获取
            if (C('DB_FIELDS_CACHE')) {
                $db     = $this->dbName ?: C('DB_NAME');
                $fields = F('_fields/' . strtolower($db . '.' . $this->tablePrefix . $this->name));
                if ($fields) {
                    $this->fields = $fields;
                    if (!empty($fields['_pk'])) {
                        $this->pk = $fields['_pk'];
                    }
                    return;
                }
            }else{
                echo "配置不存在！\r\n";//自己加的
            }
            // 每次都会读取数据表信息
            $this->flush();
        }
    }

C('DB_FIELDS_CACHE')

/**
     * 获取字段信息并缓存
     * @access public
     * @return void
     */
    public function flush()
    {
        // 缓存不存在则查询数据表信息
        $this->db->setModel($this->name);
        $fields = $this->db->getFields($this->getTableName());
        if (!$fields) {
            // 无法获取字段信息
            return false;
        }
        $this->fields = array_keys($fields);
        unset($this->fields['_pk']);
        foreach ($fields as $key => $val) {
            // 记录字段类型
            $type[$key] = $val['type'];
            if ($val['primary']) {
                // 增加复合主键支持
                if (isset($this->fields['_pk']) && null != $this->fields['_pk']) {
                    if (is_string($this->fields['_pk'])) {
                        $this->pk            = array($this->fields['_pk']);
                        $this->fields['_pk'] = $this->pk;
                    }
                    $this->pk[]            = $key;
                    $this->fields['_pk'][] = $key;
                } else {
                    $this->pk            = $key;
                    $this->fields['_pk'] = $key;
                }
                if ($val['autoinc']) {
                    $this->autoinc = true;
                }

            }
        }
        // 记录字段类型信息
        $this->fields['_type'] = $type;

        // 2008-3-7 增加缓存开关控制
        if (C('DB_FIELDS_CACHE')) {
            // 永久缓存数据表信息
            $db = $this->dbName ?: C('DB_NAME');
            F('_fields/' . strtolower($db . '.' . $this->tablePrefix . $this->name), $this->fields);
        }
    }

public function setModel($model)
    {
        $this->model = $model;
    }

/**
     * 得到完整的数据表名
     * @access public
     * @return string
     */
    public function getTableName()
    {    echo "getTableName方法被调用！\r\n";
        if (empty($this->trueTableName)) {
            $tableName = !empty($this->tablePrefix) ? $this->tablePrefix : '';
            if (!empty($this->tableName)) {
                $tableName .= $this->tableName;
            } else {
                $tableName .= parse_name($this->name);
            }
            $this->trueTableName = strtolower($tableName);
        }
        return (!empty($this->dbName) ? $this->dbName . '.' : '') . $this->trueTableName;
    }

<?php
$a = "";
if(!empty($a)){
    echo "TRUE";
}else{
    echo "FALSE";
}
?>

$tableName .= parse_name($this->name);

/**
 * 字符串命名风格转换
 * type 0 将Java风格转换为C的风格 1 将C风格转换为Java的风格
 * @param string $name 字符串
 * @param integer $type 转换类型
 * @return string
 */
function parse_name($name, $type = 0)
{
    if ($type) {
        return ucfirst(preg_replace_callback('/_([a-zA-Z])/', function ($match) {return strtoupper($match[1]);}, $name));
    } else {
        return strtolower(trim(preg_replace("/[A-Z]/", "_\\0", $name), "_"));
    }
}

function ($match) {return strtoupper($match[1]);}

/**
     * 取得数据表的字段信息
     * @access public
     */
    public function getFields($tableName)
    {
        $this->initConnect(true);
        list($tableName) = explode(' ', $tableName);
        if (strpos($tableName, '.')) {
            list($dbName, $tableName) = explode('.', $tableName);
            $sql                      = 'SHOW COLUMNS FROM `' . $dbName . '`.`' . $tableName . '`';
        } else {
            $sql = 'SHOW COLUMNS FROM `' . $tableName . '`';
        }

        $result = $this->query($sql);
        $info   = array();
        if ($result) {
            foreach ($result as $key => $val) {
                if (\PDO::CASE_LOWER != $this->_linkID->getAttribute(\PDO::ATTR_CASE)) {
                    $val = array_change_key_case($val, CASE_LOWER);
                }
                $info[$val['field']] = array(
                    'name'    => $val['field'],
                    'type'    => $val['type'],
                    'notnull' => (bool) ('' === $val['null']), // not null is empty, null is yes
                    'default' => $val['default'],
                    'primary' => (strtolower($val['key']) == 'pri'),
                    'autoinc' => (strtolower($val['extra']) == 'auto_increment'),
                );
            }
        }
        return $info;
    }

/**
     * 初始化数据库连接
     * @access protected
     * @param boolean $master 主服务器
     * @return void
     */
    protected function initConnect($master = true)
    {
        if (!empty($this->config['deploy']))
        // 采用分布式数据库
        {
            $this->_linkID = $this->multiConnect($master);
        } else
        // 默认单数据库
        if (!$this->_linkID) {
            $this->_linkID = $this->connect();
        }

    }

/**
     * 连接数据库方法
     * @access public
     */
    public function connect($config = '', $linkNum = 0, $autoConnection = false)
    {
        if (!isset($this->linkID[$linkNum])) {
            if (empty($config)) {
                $config = $this->config;
            }

            try {
                if (empty($config['dsn'])) {
                    $config['dsn'] = $this->parseDsn($config);
                }
                if (version_compare(PHP_VERSION, '5.3.6', '<=')) {
                    // 禁用模拟预处理语句
                    $this->options[PDO::ATTR_EMULATE_PREPARES] = false;
                }
                $this->linkID[$linkNum] = new PDO($config['dsn'], $config['username'], $config['password'], $this->options);
            } catch (\PDOException $e) {
                if ($autoConnection) {
                    trace($e->getMessage(), '', 'ERR');
                    return $this->connect($autoConnection, $linkNum);
                } elseif ($config['debug']) {
                    E($e->getMessage());
                }
            }
        }
        return $this->linkID[$linkNum];
    }

/**
     * 执行查询 返回数据集
     * @access public
     * @param string $str  sql指令
     * @param boolean $fetchSql  不执行只是获取SQL
     * @return mixed
     */
    public function query($str, $fetchSql = false)
    {
        $this->initConnect(false);
        if (!$this->_linkID) {
            return false;
        }

        $this->queryStr = $str;
        if (!empty($this->bind)) {
            $that           = $this;
            $this->queryStr = strtr($this->queryStr, array_map(function ($val) use ($that) {return '\'' . $that->escapeString($val) . '\'';}, $this->bind));
        }
        if ($fetchSql) {
            return $this->queryStr;
        }
        //释放前次的查询结果
        if (!empty($this->PDOStatement)) {
            $this->free();
        }

        $this->queryTimes++;
        N('db_query', 1); // 兼容代码
        // 调试开始
        $this->debug(true);
        $this->PDOStatement = $this->_linkID->prepare($str);
        if (false === $this->PDOStatement) {
            $this->error();
            return false;
        }
        foreach ($this->bind as $key => $val) {
            if (is_array($val)) {
                $this->PDOStatement->bindValue($key, $val[0], $val[1]);
            } else {
                $this->PDOStatement->bindValue($key, $val);
            }
        }
        $this->bind = array();
        try {
            $result = $this->PDOStatement->execute();
            // 调试结束
            $this->debug(false);
            if (false === $result) {
                $this->error();
                return false;
            } else {
                return $this->getResult();
            }
        } catch (\PDOException $e) {
            $this->error();
            return false;
        }
    }

/**  
* 设置和获取统计数据  
* 使用方法:  
* <code>  
* N('db',1); // 记录数据库操作次数  
* N('read',1); // 记录读取次数  
* echo N('db'); // 获取当前页面数据库的所有操作次数  
* echo N('read'); // 获取当前页面读取次数  
* </code>  
* @param string $key 标识位置  
* @param integer $step 步进值  
* @param boolean $save 是否保存结果  
* @return mixed  
*/  
function N($key, $step = 0, $save = false)  
{ echo "N方法被调用！！！\r\n";  
static $_num = array();  
if (!isset($_num[$key])) {  
$_num[$key] = (false !== $save) ? S('N_' . $key) : 0;  
}  
if (empty($step)) {  
return $_num[$key];  
} else {  
$_num[$key] = $_num[$key] + (int) $step;  
}  
if (false !== $save) {  
// 保存结果  
S('N_' . $key, $_num[$key], $save);  
}  
return null;  
}

/**  
* 数据库调试 记录当前SQL  
* @access protected  
* @param boolean $start 调试开始标记 true 开始 false 结束  
*/  
protected function debug($start)  
{  
if ($this->config['debug']) {  
// 开启数据库调试模式  
if ($start) {  
G('queryStartTime');  
} else {  
$this->modelSql[$this->model] = $this->queryStr;  
//$this->model = '_think_';  
// 记录操作结束时间  
G('queryEndTime');  
trace($this->queryStr . ' [ RunTime:' . G('queryStartTime', 'queryEndTime') . 's ]', '', 'SQL');  
}  
}  
}

$this->PDOStatement = $this->_linkID->prepare($str);

foreach ($this->bind as $key => $val) {
            if (is_array($val)) {
                $this->PDOStatement->bindValue($key, $val[0], $val[1]);
            } else {
                $this->PDOStatement->bindValue($key, $val);
            }
        }

/**
     * 获得所有的查询数据
     * @access private
     * @return array
     */
    private function getResult()
    {
        //返回数据集
        $result        = $this->PDOStatement->fetchAll(PDO::FETCH_ASSOC);
        $this->numRows = count($result);
        return $result;
    }

array(3) {
[0] =>
array(6) {
'field' =>
string(2) "id"
'type' =>
string(7) "int(11)"
'null' =>
string(2) "NO"
'key' =>
string(3) "PRI"
'default' =>
NULL
'extra' =>
string(14) "auto_increment"
}
[1] =>
array(6) {
'field' =>
string(7) "content"
'type' =>
string(4) "text"
'null' =>
string(3) "YES"
'key' =>
string(0) ""
'default' =>
NULL
'extra' =>
string(0) ""
}
[2] =>
array(6) {
'field' =>
string(5) "title"
'type' =>
string(4) "text"
'null' =>
string(3) "YES"
'key' =>
string(0) ""
'default' =>
NULL
'extra' =>
string(0) ""
}
}

array(3) {
'id' =>
array(6) {
'name' =>
string(2) "id"
'type' =>
string(7) "int(11)"
'notnull' =>
bool(false)
'default' =>
NULL
'primary' =>
bool(true)
'autoinc' =>
bool(true)
}
'content' =>
array(6) {
'name' =>
string(7) "content"
'type' =>
string(4) "text"
'notnull' =>
bool(false)
'default' =>
NULL
'primary' =>
bool(false)
'autoinc' =>
bool(false)
}
'title' =>
array(6) {
'name' =>
string(5) "title"
'type' =>
string(4) "text"
'notnull' =>
bool(false)
'default' =>
NULL
'primary' =>
bool(false)
'autoinc' =>
bool(false)
}
}

array(3) {
  [0] =>
  string(2) "id"
  [1] =>
  string(7) "content"
  [2] =>
  string(5) "title"
}

array(3) {
  'id' => string(7) "int(11)"
  'content' => string(4) "text"
  'title' => string(4) "text"
}

/**
     * 指定查询字段 支持字段排除
     * @access public
     * @param mixed $field
     * @param boolean $except 是否排除
     * @return Model
     */
    public function field($field, $except = false)
    {   echo "field函数被调用！！\r\n";
        if (true === $field){
// 获取全部字段
            $fields = $this->getDbFields();
            $field  = $fields ?: '*';
        } elseif ($except) {
// 字段排除
            if (is_string($field)) {
                $field = explode(',', $field);
            }
            $fields = $this->getDbFields();
            $field  = $fields ? array_diff($fields, $field) : $field;
        }
        $this->options['field'] = $field;
        return $this;
    }

/**
     * 查询数据
     * @access public
     * @param mixed $options 表达式参数
     * @return mixed
     */
    public function find($options = array())
    {
        if (is_numeric($options) || is_string($options)) {
            $where[$this->getPk()] = $options;
            $options               = array();
            $options['where']      = $where;
        }
        // 根据复合主键查找记录
        $pk = $this->getPk();
        if (is_array($options) && (count($options) > 0) && is_array($pk)) {
            // 根据复合主键查询
            $count = 0;
            foreach (array_keys($options) as $key) {
                if (is_int($key)) {
                    $count++;
                }

            }
            if (count($pk) == $count) {
                $i = 0;
                foreach ($pk as $field) {
                    $where[$field] = $options[$i];
                    unset($options[$i++]);
                }
                $options['where'] = $where;
            } else {
                return false;
            }
        }
        // 总是查找一条记录
        $options['limit'] = 1;
        // 分析表达式
        $options = $this->_parseOptions($options);
        // 判断查询缓存
        if (isset($options['cache'])) {
            $cache = $options['cache'];
            $key   = is_string($cache['key']) ? $cache['key'] : md5(serialize($options));
            $data  = S($key, '', $cache);
            if (false !== $data) {
                $this->data = $data;
                return $data;
            }
        }
        $resultSet = $this->db->select($options);
        if (false === $resultSet) {
            return false;
        }
        if (empty($resultSet)) {
// 查询结果为空
            return null;
        }
        if (is_string($resultSet)) {
            return $resultSet;
        }

        // 读取数据后的处理
        $data = $this->_read_data($resultSet[0]);
        $this->_after_find($data, $options);
        if (!empty($this->options['result'])) {
            return $this->returnResult($data, $this->options['result']);
        }
        $this->data = $data;
        if (isset($cache)) {
            S($key, $data, $cache);
        }
        return $this->data;
    }

/**  
* 获取主键名称  
* @access public  
* @return string  
*/  
public function getPk()  
{ echo "getPk方法被调用！！\r\n";  
var_dump($this->pk);  
return $this->pk;  
}

string(2) "id"

array(1) {
'id' =>
string(1) "2"
}

string(2) "id"

/**
     * 获取数据表字段信息
     * @access public
     * @return array
     */
    public function getDbFields()
    {
        if (isset($this->options['table'])) {
// 动态指定表名
            if (is_array($this->options['table'])) {
                $table = key($this->options['table']);
            } else {
                $table = $this->options['table'];
                if (strpos($table, ')')) {
                    // 子查询
                    return false;
                }
            }
            $fields = $this->db->getFields($table);
            return $fields ? array_keys($fields) : false;
        }
        if ($this->fields) {
            $fields = $this->fields;
            unset($fields['_type'], $fields['_pk']);
            return $fields;
        }
        return false;
    }

/**
     * 数据类型检测
     * @access protected
     * @param mixed $data 数据
     * @param string $key 字段名
     * @return void
     */
    protected function _parseType(&$data, $key)
    {
        if (!isset($this->options['bind'][':' . $key]) && isset($this->fields['_type'][$key])) {
            $fieldType = strtolower($this->fields['_type'][$key]);
            if (false !== strpos($fieldType, 'enum')) {
                // 支持ENUM类型优先检测
            } elseif (false === strpos($fieldType, 'bigint') && false !== strpos($fieldType, 'int')) {
                $data[$key] = intval($data[$key]);
            } elseif (false !== strpos($fieldType, 'float') || false !== strpos($fieldType, 'double')) {
                $data[$key] = floatval($data[$key]);
            } elseif (false !== strpos($fieldType, 'bool')) {
                $data[$key] = (bool) $data[$key];
            }
        }
    }

/**
     * 查找记录
     * @access public
     * @param array $options 表达式
     * @return mixed
     */
    public function select($options = array())
    {
        $this->model = $options['model'];
        $this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
        $sql    = $this->buildSelectSql($options);
        $result = $this->query($sql, !empty($options['fetch_sql']) ? true : false);
        return $result;
    }

/**
     * 参数绑定分析
     * @access protected
     * @param array $bind
     * @return array
     */
    protected function parseBind($bind)
    {
        $this->bind = array_merge($this->bind, $bind);
    }

/**
     * 生成查询SQL
     * @access public
     * @param array $options 表达式
     * @return string
     */
    public function buildSelectSql($options = array())
    {
        if (isset($options['page'])) {
            // 根据页数计算limit
            list($page, $listRows) = $options['page'];
            $page                  = $page > 0 ? $page : 1;
            $listRows              = $listRows > 0 ? $listRows : (is_numeric($options['limit']) ? $options['limit'] : 20);
            $offset                = $listRows * ($page - 1);
            $options['limit']      = $offset . ',' . $listRows;
        }
        $sql = $this->parseSql($this->selectSql, $options);
        return $sql;
    }

/**
     * 替换SQL语句中表达式
     * @access public
     * @param array $options 表达式
     * @return string
     */
    public function parseSql($sql, $options = array())
    {
        $sql = str_replace(
            array('%TABLE%', '%DISTINCT%', '%FIELD%', '%JOIN%', '%WHERE%', '%GROUP%', '%HAVING%', '%ORDER%', '%LIMIT%', '%UNION%', '%LOCK%', '%COMMENT%', '%FORCE%'),
            array(
                $this->parseTable($options['table']),
                $this->parseDistinct(isset($options['distinct']) ? $options['distinct'] : false),
                $this->parseField(!empty($options['field']) ? $options['field'] : '*'),
                $this->parseJoin(!empty($options['join']) ? $options['join'] : ''),
                $this->parseWhere(!empty($options['where']) ? $options['where'] : ''),
                $this->parseGroup(!empty($options['group']) ? $options['group'] : ''),
                $this->parseHaving(!empty($options['having']) ? $options['having'] : ''),
                $this->parseOrder(!empty($options['order']) ? $options['order'] : ''),
                $this->parseLimit(!empty($options['limit']) ? $options['limit'] : ''),
                $this->parseUnion(!empty($options['union']) ? $options['union'] : ''),
                $this->parseLock(isset($options['lock']) ? $options['lock'] : false),
                $this->parseComment(!empty($options['comment']) ? $options['comment'] : ''),
                $this->parseForce(!empty($options['force']) ? $options['force'] : ''),
            ), $sql);
        return $sql;
    }

array(1) { 
 [0] => 
 array(1) { 
 'content' => 
 string(41) "This is the content of the second article" 
 } 
 }

/**
     * 数据读取后的处理
     * @access protected
     * @param array $data 当前数据
     * @return array
     */
    protected function _read_data($data)
    {
        // 检查字段映射
        if (!empty($this->_map) && C('READ_DATA_MAP')) {
            foreach ($this->_map as $key => $val) {
                if (isset($data[$val])) {
                    $data[$key] = $data[$val];
                    unset($data[$val]);
                }
            }
        }
        return $data;
    }

protected function returnResult($data, $type = '')  
{  
if ($type) {  
if (is_callable($type)) {  
return call_user_func($type, $data);  
}  
switch (strtolower($type)) {  
case 'json':  
return json_encode($data);  
case 'xml':  
return xml_encode($data);  
}  
}  
return $data;  
}

/**
 * 缓存管理
 * @param mixed $name 缓存名称，如果为数组表示进行缓存设置
 * @param mixed $value 缓存值
 * @param mixed $options 缓存参数
 * @return mixed
 */
function S($name, $value = '', $options = null)
{
    static $cache = '';
    if (is_array($options)) {
        // 缓存操作的同时初始化
        $type  = isset($options['type']) ? $options['type'] : '';
        $cache = Think\Cache::getInstance($type, $options);
    } elseif (is_array($name)) {
        // 缓存初始化
        $type  = isset($name['type']) ? $name['type'] : '';
        $cache = Think\Cache::getInstance($type, $name);
        return $cache;
    } elseif (empty($cache)) {
        // 自动初始化
        $cache = Think\Cache::getInstance();
    }
    if ('' === $value) {
        // 获取缓存
        return $cache->get($name);
    } elseif (is_null($value)) {
        // 删除缓存
        return $cache->rm($name);
    } else {
        // 缓存数据
        if (is_array($options)) {
            $expire = isset($options['expire']) ? $options['expire'] : null;
        } else {
            $expire = is_numeric($options) ? $options : null;
        }
        return $cache->set($name, $value, $expire);
    }
}

/**  
     * 查询数据  
     * @access public  
     * @param mixed $options 表达式参数  
     * @return mixed  
     */  
    public function find($options = array())  
    {  
        if (is_numeric($options) || is_string($options)) {  
            $where[$this->getPk()] = $options;  
            $options               = array();  
            $options['where']      = $where;  
        }  
        // 根据复合主键查找记录  
        $pk = $this->getPk();  
        if (is_array($options) && (count($options) > 0) && is_array($pk)) {  
            // 根据复合主键查询  
            $count = 0;  
            foreach (array_keys($options) as $key) {  
                if (is_int($key)) {  
                    $count++;  
                }  

            }  
            if (count($pk) == $count) {  
                $i = 0;  
                foreach ($pk as $field) {  
                    $where[$field] = $options[$i];  
                    unset($options[$i++]);  
                }  
                $options['where'] = $where;  
            } else {  
                return false;  
            }  
        }  
        // 总是查找一条记录  
        $options['limit'] = 1;  
        // 分析表达式  
        $options = $this->_parseOptions($options);  
        // 判断查询缓存  
        if (isset($options['cache'])) {  
            $cache = $options['cache'];  
            $key   = is_string($cache['key']) ? $cache['key'] : md5(serialize($options));  
            $data  = S($key, '', $cache);  
            if (false !== $data) {  
                $this->data = $data;  
                return $data;  
            }  
        }  
        $resultSet = $this->db->select($options);  
        if (false === $resultSet) {  
            return false;  
        }  
        if (empty($resultSet)) {  
// 查询结果为空  
            return null;  
        }  
        if (is_string($resultSet)) {  
            return $resultSet;  
        }  

        // 读取数据后的处理  
        $data = $this->_read_data($resultSet[0]);  
        $this->_after_find($data, $options);  
        if (!empty($this->options['result'])) {  
            return $this->returnResult($data, $this->options['result']);  
        }  
        $this->data = $data;  
        if (isset($cache)) {  
            S($key, $data, $cache);  
        }  
        return $this->data;  
    }

// 判断查询缓存
        if(isset($options['cache'])){
            $cache  =   $options['cache'];
            $key    =   is_string($cache['key'])?$cache['key']:md5(serialize($options));
            $data   =   S($key,'',$cache);
            if(false !== $data){
                $this->data     =   $data;
                return $data;
            }
        }

// 读取数据后的处理
        $data   =   $this->_read_data($resultSet[0]);
        $this->_after_find($data,$options);
        if(!empty($this->options['result'])) {
            return $this->returnResult($data,$this->options['result']);
        }
        $this->data     =   $data;
        if(isset($cache)){
            S($key,$data,$cache);
        }

function S($name, $value = '', $options = null)
    {
        static $cache = '';
        if (is_array($options)) {
            $type = isset($options['type']) ? $options['type'] : '';
            $cache = Think\Cache::getInstance($type, $options);
        } elseif (is_array($name)) {
            $type = isset($name['type']) ? $name['type'] : '';
            $cache = Think\Cache::getInstance($type, $name);
            return $cache;
        } elseif (empty($cache)) {
            $cache = Think\Cache::getInstance();
        }
        if ('' === $value) {
            return $cache->get($name);
        } elseif (is_null($value)) {
            return $cache->rm($name);
        } else {
            if (is_array($options)) {
                $expire = isset($options['expire']) ? $options['expire'] : null;
            } else {
                $expire = is_numeric($options) ? $options : null;
            }
            return $cache->set($name, $value, $expire);
        }
    }

if ('' === $value) {
   return $cache->get($name);

/**  
* 读取缓存  
* @access public  
* @param string $name 缓存变量名  
* @return mixed  
*/  
public function get($name)  
{ 
$filename = $this->filename($name);  
if (!is_file($filename)) {  
return false;  
}  
N('cache_read', 1);  
$content = file_get_contents($filename);  
if (false !== $content) {  
$expire = (int) substr($content, 8, 12);  
if (0 != $expire && time() > filemtime($filename) + $expire) {  
//缓存过期删除缓存文件  
unlink($filename);  
return false;  
}  
if (C('DATA_CACHE_CHECK')) {  
//开启数据校验  
$check = substr($content, 20, 32);  
$content = substr($content, 52, -3);  
if (md5($content) != $check) {  
//校验错误  
return false;  
}  
} else {  
$content = substr($content, 20, -3);  
}  
if (C('DATA_CACHE_COMPRESS') && function_exists('gzcompress')) {  
//启用数据压缩  
$content = gzuncompress($content);  
}  
$content = unserialize($content);  
return $content;  
} else {  
return false;  
}  
}

/**  
* 取得变量的存储文件名  
* @access private  
* @param string $name 缓存变量名  
* @return string  
*/  
private function filename($name)  
{  
$name = md5(C('DATA_CACHE_KEY') . $name);  
if (C('DATA_CACHE_SUBDIR')) {  
// 使用子目录  
$dir = '';  
for ($i = 0; $i < C('DATA_PATH_LEVEL'); $i++) {  
$dir .= $name{$i} . '/';  
}  
if (!is_dir($this->options['temp'] . $dir)) {  
mkdir($this->options['temp'] . $dir, 0755, true);  
}  
$filename = $dir . $this->options['prefix'] . $name . '.php';  
} else {  
$filename = $this->options['prefix'] . $name . '.php';  
}  
return $this->options['temp'] . $filename;  
}

namespace Behavior {
    use Think\Storage;
    use Think\Think;
    class ParseTemplateBehavior
    {
        public function run(&$_data)
        {
            $engine = strtolower(C('TMPL_ENGINE_TYPE'));
            $_content = empty($_data['content']) ? $_data['file'] : $_data['content'];
            $_data['prefix'] = !empty($_data['prefix']) ? $_data['prefix'] : C('TMPL_CACHE_PREFIX');
            if ('think' == $engine) {
                if ((!empty($_data['content']) && $this->checkContentCache($_data['content'], $_data['prefix'])) || $this->checkCache($_data['file'], $_data['prefix'])) {
                    Storage::load(C('CACHE_PATH') . $_data['prefix'] . md5($_content) . C('TMPL_CACHFILE_SUFFIX'), $_data['var']);
                } else {
                    $tpl = Think::instance('Think\\Template');
                    $tpl->fetch($_content, $_data['var'], $_data['prefix']);
                }
            } else {
                if (strpos($engine, '\\')) {
                    $class = $engine;
                } else {
                    $class = 'Think\\Template\\Driver\\' . ucwords($engine);
                }
                if (class_exists($class)) {
                    $tpl = new $class;
                    $tpl->fetch($_content, $_data['var']);
                } else {
                    E(L('_NOT_SUPPORT_') . ': ' . $class);
                }
            }
        }
        protected function checkCache($tmplTemplateFile, $prefix = '')
        {
            if (!C('TMPL_CACHE_ON')) {
                return false;
            }
            $tmplCacheFile = C('CACHE_PATH') . $prefix . md5($tmplTemplateFile) . C('TMPL_CACHFILE_SUFFIX');
            if (!Storage::has($tmplCacheFile)) {
                return false;
            } elseif (filemtime($tmplTemplateFile) > Storage::get($tmplCacheFile, 'mtime')) {
                return false;
            } elseif (C('TMPL_CACHE_TIME') != 0 && time() > Storage::get($tmplCacheFile, 'mtime') + C('TMPL_CACHE_TIME')) {
                return false;
            }
            if (C('LAYOUT_ON')) {
                $layoutFile = THEME_PATH . C('LAYOUT_NAME') . C('TMPL_TEMPLATE_SUFFIX');
                if (filemtime($layoutFile) > Storage::get($tmplCacheFile, 'mtime')) {
                    return false;
                }
            }
            return true;
        }
        protected function checkContentCache($tmplContent, $prefix = '')
        {
            if (Storage::has(C('CACHE_PATH') . $prefix . md5($tmplContent) . C('TMPL_CACHFILE_SUFFIX'))) {
                return true;
            } else {
                return false;
            }
        }
    }
}