diff --git a/Think/Cache.php b/Think/Cache.php
index 930307fa..95549205 100644
--- a/Think/Cache.php
+++ b/Think/Cache.php
@@ -27,12 +27,8 @@ class Cache {
     static public function connect($options=[]) {
         $type   =   !empty($options['type'])?$options['type']:'File';
         $class = 'Think\\Cache\\Driver\\'.ucwords($type);
-        if(class_exists($class)) {
-            self::$handler = new $class($options);
-            return self::$handler;
-        }else{
-            E('_CACHE_TYPE_INVALID_:'.$type);
-        }
+        self::$handler = new $class($options);
+        return self::$handler;
     }
 
 	static public function __callStatic($method, $params){
diff --git a/Think/Config.php b/Think/Config.php
index 511e65ae..42b66eb7 100644
--- a/Think/Config.php
+++ b/Think/Config.php
@@ -21,11 +21,7 @@ class Config {
     // 解析其他格式的配置参数
     static public function parse($config,$type,$range=''){
         $class  =   '\Think\Config\Driver\\'.ucwords($type);
-        if(class_exists($class)) {
-            self::set((new $class())->parse($config),'',$range);
-        }else{
-            E('class not exists: ' . $class);
-        }
+        self::set((new $class())->parse($config),'',$range);
     }
 
     // 加载配置文件
diff --git a/Think/Db.php b/Think/Db.php
index f3561ee0..7aacd44f 100644
--- a/Think/Db.php
+++ b/Think/Db.php
@@ -33,11 +33,7 @@ class Db {
             $options    =   self::parseConfig($config);
             // 如果采用lite方式 仅支持原生SQL 包括query和execute方法
             $class  =   $lite?  'Think\Db\Lite' :   'Think\\Db\\Driver\\'.ucwords($options['dbms']);
-            if(class_exists($class)) {
-                self::$instance[$md5]   =   new $class($options);
-            }else{
-                E('_DB_TYPE_INVALID_:'.$options['dbms']);
-            }
+            self::$instance[$md5]   =   new $class($options);
         }
         self::$_instance    =   self::$instance[$md5];
         return self::$_instance;
diff --git a/Think/Error.php b/Think/Error.php
index 40e03c08..0c7884a8 100644
--- a/Think/Error.php
+++ b/Think/Error.php
@@ -41,7 +41,7 @@ class Error {
           case E_PARSE:
           case E_CORE_ERROR:
           case E_COMPILE_ERROR:
-          case E_USER_ERROR:
+          case E_USER_ERROR:echo ("2");
             $errorStr = "[$errno] $errstr ".$errfile." 第 $errline 行.";
             Log::write($errorStr,'ERROR');
             self::halt($errorStr);
diff --git a/Think/Image.php b/Think/Image.php
index 45f92c86..bfb0b0a5 100644
--- a/Think/Image.php
+++ b/Think/Image.php
@@ -51,12 +51,8 @@ class Image {
     public function init($type = 'Gd', $imgname = null){
         /* 引入处理库，实例化图片处理对象 */
         $class  =    '\Think\Image\Driver\\'.ucwords($type);
-        if(class_exists($class)) {
-            self::$im = new $class($imgname);
-            return self::$im;
-        }else{
-            throw new Exception('不支持的图片处理库类型');
-        }
+        self::$im = new $class($imgname);
+        return self::$im;
     }
 
     // 调用驱动类的方法
diff --git a/Think/Log.php b/Think/Log.php
index 5de3eff3..27770ccd 100644
--- a/Think/Log.php
+++ b/Think/Log.php
@@ -19,14 +19,9 @@ class Log {
         if(!empty($config['type'])) { // 读取log驱动
             $class      = 'Think\\Log\\Driver\\'. ucwords(strtolower($config['type']));
             // 检查驱动类
-            if(class_exists($class)) {
-                unset($config['type']);
-                self::$handler = new $class($config);
-                return self::$handler;
-            }else {
-                // 类没有定义
-                E(L('_CLASS_NOT_EXIST_').': ' . $class);
-            }
+            unset($config['type']);
+            self::$handler = new $class($config);
+            return self::$handler;
         }
     }
     
diff --git a/Think/Oauth.php b/Think/Oauth.php
index a39563ca..a2e73bb5 100644
--- a/Think/Oauth.php
+++ b/Think/Oauth.php
@@ -34,12 +34,8 @@ class Oauth {
      */
     static public function connect($type,$options=[]) {
         $class = 'Think\\Oauth\\Driver\\'.ucwords($type);
-        if(class_exists($class)) {
-            self::$handler = new $class($options);
-            return self::$handler;
-        }else{
-            E('_OAUTH_TYPE_INVALID_:'.$type);
-        }
+        self::$handler = new $class($options);
+        return self::$handler;
     }
 
     // 跳转到授权登录页面
diff --git a/Think/Parser.php b/Think/Parser.php
index 63e8bb32..0091fef8 100644
--- a/Think/Parser.php
+++ b/Think/Parser.php
@@ -16,13 +16,9 @@ class Parser {
 
     // 解析内容
     static public function parse($content,$type){
-        $class  =   '\Think\Parser\Driver\\'.ucwords($type);
-        if(class_exists($class)) {
-            $parse  =   new $class();
-            return $parse->parse($content);
-        }else{
-            E(L('_CLASS_NOT_EXIST_').': ' . $class);
-        }
+        $class  =   '\\Think\\Parser\\Driver\\'.ucwords($type);
+        $parse  =   new $class();
+        return $parse->parse($content);
     }
 
     // 调用驱动类的方法
diff --git a/Think/Template.php b/Think/Template.php
index 44cafb1d..6d741b21 100644
--- a/Think/Template.php
+++ b/Think/Template.php
@@ -426,7 +426,7 @@ class  Template {
     protected function parseTagLib($tagLib,&$content,$hide=false) {
         $begin      =   $this->config['taglib_begin'];
         $end        =   $this->config['taglib_end'];
-        $className  =   'Think\\Template\\Taglib\\'.ucwords($tagLib);
+        $className  =   '\\Think\\Template\\Taglib\\'.ucwords($tagLib);
         $tLib       =   new $className;
         foreach ($tLib->getTags() as $name=>$val){
             $tags   =   [$name];
@@ -682,7 +682,9 @@ class  Template {
         $parseStr = $this->parseTemplateName($tmplPublicName);
         // 替换变量
         foreach ($vars as $key=>$val) {
-            $parseStr = str_replace('['.$key.']',$val,$parseStr);
+            if(strpos($val,'['.$key.']')) {
+                $parseStr = str_replace('['.$key.']',$val,$parseStr);
+            }
         }
         // 再次对包含文件进行模板分析
         return $this->parseInclude($parseStr);
diff --git a/Think/View.php b/Think/View.php
index 165c4a7a..a0fbc3f2 100644
--- a/Think/View.php
+++ b/Think/View.php
@@ -12,8 +12,7 @@
 namespace Think;
 class View {
 
-    public $engine   =   null;       // 模板引擎
-    protected $template =   null;       // 模板文件
+    protected $engine   =   null;       // 模板引擎实例
     protected $data     =   [];    // 模板变量
     protected $config   =   [];    // 视图参数
     
@@ -38,7 +37,7 @@ class View {
      * @param mixed $name
      * @param mixed $value
      */
-    public function __set($name,$value){
+    public function __set($name,$value=''){
         $this->config[$name] = $value;
     }
 
@@ -50,7 +49,7 @@ class View {
     }
     
     public function engine($engine,$config=[]){
-        $class  =   '\Think\View\Driver\\'.ucwords($engine);
+        $class  =   '\\Think\\View\\Driver\\'.ucwords($engine);
         $this->engine =   new $class($config);
         return $this;
     }
@@ -59,13 +58,15 @@ class View {
      * 加载模板和页面输出 可以返回输出内容
      * @access public
      * @param string $template 模板文件名
+     * @param array $vars 模板输出变量
+     * @param string $cacheId 模板缓存标识
      * @param boolean $return 是否返回
      * @return mixed
      */
-    public function display($template='',$vars=[],$return=false) {
+    public function display($template='',$vars=[],$cacheId,$return=false) {
         Tag::listen('view_begin',$template);
         // 解析并获取模板内容
-        $content = $this->fetch($template,$vars);
+        $content = $this->fetch($template,$vars,$cacheId);
         // 输出模板内容
         if($return) {
             return $content;
@@ -79,23 +80,24 @@ class View {
      * @access protected
      * @param string $template 模板文件名或者内容
      * @param array $vars 模板输出变量
+     * @param string $cacheId 模板缓存标识
      * @return string
      */
-    protected function fetch($template,$vars=[]) {
+    protected function fetch($template,$vars=[],$cacheId='') {
         Tag::listen('view_template',$template);
         $vars   =   $vars?$vars:$this->data;
         // 页面缓存
         ob_start();
         ob_implicit_flush(0);
         if($this->engine) { // 指定模板引擎
-            $this->engine->fetch($template,$vars);
-        }else{
+            $this->engine->fetch($template,$vars,$cacheId);
+        }else{  // 原生PHP解析
             extract($vars, EXTR_OVERWRITE);
             is_file($template)?include $template:eval('?>'.$template);
         }
         // 获取并清空缓存
         $content = ob_get_clean();
-        Tag::listen('content_filter',$content);
+        Tag::listen('view_filter',$content);
         // 输出模板文件
         return $content;
     }
diff --git a/Think/View/Driver/Think.php b/Think/View/Driver/Think.php
index c442cc7d..0f1929d2 100644
--- a/Think/View/Driver/Think.php
+++ b/Think/View/Driver/Think.php
@@ -17,8 +17,12 @@ class Think {
         $this->template =   new Template($config);
     }
 
-    public function fetch($template,$data=[]){
-        $this->template->display($template,$data);
+    public function fetch($template,$data=[],$cacheId=''){
+        if(is_file($template)) {
+            $this->template->display($template,$data,$cacheId);
+        }else{
+            $this->template->fetch($template,$data);
+        }
     }
 
 }
\ No newline at end of file