diff --git a/framework/control.class.php b/framework/control.class.php
index 790c16393f..41322fb2bd 100755
--- a/framework/control.class.php
+++ b/framework/control.class.php
@@ -207,9 +207,9 @@ class control
     /**
      * Load the model file of one module.
      * 
-     * @param   string  $methodName    The method name, if empty, use current module's name.
+     * @param   string      $methodName    The method name, if empty, use current module's name.
      * @access  public
-     * @return  void
+     * @return  object|bool If no model file, return false. Else return the model object.
      */
     public function loadModel($moduleName = '')
     {
@@ -255,10 +255,10 @@ class control
     /**
      * Set the view file, thus can use fetch other module's page.
      * 
-     * @param string $moduleName    module name
-     * @param string $methodName    method name
+     * @param  string   $moduleName    module name
+     * @param  string   $methodName    method name
      * @access private
-     * @return string               the view file
+     * @return string  the view file
      */
     private function setViewFile($moduleName, $methodName)
     {
@@ -284,7 +284,7 @@ class control
      * 
      * @param  string $viewFile 
      * @access public
-     * @return string
+     * @return string|bool  If extension view file exists, return the path. Else return fasle.
      */
     public function getExtViewFile($viewFile)
     {
@@ -295,6 +295,7 @@ class control
             helper::cd($extPath);
             return $extViewFile;
         }
+        return false;
     }
 
     /**
@@ -324,10 +325,10 @@ class control
     /**
      * Parse view file. 
      *
-     * @param string $moduleName    module name, if empty, use current module.
-     * @param string $methodName    method name, if empty, use current method.
+     * @param  string $moduleName    module name, if empty, use current module.
+     * @param  string $methodName    method name, if empty, use current method.
      * @access public
-     * @return the parsed result.
+     * @return string the parsed result.
      */
     public function parse($moduleName = '', $methodName = '')
     {
@@ -407,7 +408,7 @@ class control
      * @param   string  $methodName    method name.
      * @param   array   $params        params.
      * @access  public
-     * @return  string
+     * @return  string  the parsed html.
      */
     public function fetch($moduleName = '', $methodName = '', $params = array())
     {
@@ -469,12 +470,12 @@ class control
     /**
      * Create a link to one method of one module.
      * 
-     * @param   string  $moduleName    module name
-     * @param   string  $methodName    method name
-     * @param   mixed   $vars          the params passwd, can be array(key=>value) or key1=value1&key2=value2
-     * @param   string  $viewType      the view type
+     * @param   string         $moduleName    module name
+     * @param   string         $methodName    method name
+     * @param   string|array   $vars          the params passed, can be array(key=>value) or key1=value1&key2=value2
+     * @param   string         $viewType      the view type
      * @access  public
-     * @return  string
+     * @return  string the link string.
      */
     public function createLink($moduleName, $methodName = 'index', $vars = array(), $viewType = '')
     {
@@ -485,11 +486,11 @@ class control
     /**
      * Create a link to the inner method of current module.
      * 
-     * @param   string  $methodName    method name
-     * @param   mixed   $vars          the params passwd, can be array(key=>value) or key1=value1&key2=value2
-     * @param   string  $viewType      the view type
+     * @param   string         $methodName    method name
+     * @param   string|array   $vars          the params passed, can be array(key=>value) or key1=value1&key2=value2
+     * @param   string         $viewType      the view type
      * @access  public
-     * @return  string
+     * @return  string  the link string.
      */
     public function inlink($methodName = 'index', $vars = array(), $viewType = '')
     {
diff --git a/framework/helper.class.php b/framework/helper.class.php
index 0fa824bc4b..ed1447f34b 100644
--- a/framework/helper.class.php
+++ b/framework/helper.class.php
@@ -29,7 +29,7 @@ class helper
      * @param mixed     $value      the value to be set.
      * @static
      * @access public
-     * @return void
+     * @return bool
      */
     static public function setMember($objName, $key, $value)
     {
@@ -39,6 +39,7 @@ class helper
         $value = serialize($value);
         $code  = ("\$${objName}->{$key}=unserialize(<<<EOT\n$value\nEOT\n);");
         eval($code);
+        return true;
     }
 
     /**
@@ -51,13 +52,13 @@ class helper
      * helper::createLink('hello', 'index', array('var1' => 'value1', 'var2' => 'value2');
      * ?>
      * </code>
-     * @param string    $moduleName     module name
-     * @param string    $methodName     method name
-     * @param mixed     $vars           the params passed to the method, can be array('key' => 'value') or key1=value1&key2=value2) or key1=value1&key2=value2
-     * @param string    $viewType       the view type
+     * @param string       $moduleName     module name
+     * @param string       $methodName     method name
+     * @param string|array $vars           the params passed to the method, can be array('key' => 'value') or key1=value1&key2=value2) or key1=value1&key2=value2
+     * @param string       $viewType       the view type
      * @static
      * @access public
-     * @return string
+     * @return string the link string.
      */
     static public function createLink($moduleName, $methodName = 'index', $vars = '', $viewType = '')
     {
@@ -139,10 +140,10 @@ class helper
     /**
      * Set the model file of one module. If there's an extension file, merge it with the main model file.
      * 
-     * @param   string      $moduleName     the module name
+     * @param   string $moduleName the module name
      * @static
      * @access  public
-     * @return  string      the model file
+     * @return  string the model file
      */
     static public function setModelFile($moduleName)
     {
@@ -202,10 +203,10 @@ class helper
     /**
      * Create the in('a', 'b') string.
      * 
-     * @param   misc    $ids   the id lists, can be a array or a string with ids joined with comma.
+     * @param   string|array $ids   the id lists, can be a array or a string with ids joined with comma.
      * @static
      * @access  public
-     * @return  string
+     * @return  string  the string like IN('a', 'b').
      */
     static public function dbIN($ids)
     {
@@ -219,7 +220,7 @@ class helper
      * @param   string  $string   the string to encode.
      * @static
      * @access  public
-     * @return  string
+     * @return  string  encoded string.
      */
     static public function safe64Encode($string)
     {
@@ -232,7 +233,7 @@ class helper
      * @param   string  $string   the string to decode
      * @static
      * @access  public
-     * @return  string
+     * @return  string  decoded string.
      */
     static public function safe64Decode($string)
     {
@@ -245,7 +246,7 @@ class helper
      * @param   date  $date1   the first date.
      * @param   date  $date2   the sencode date.
      * @access  public
-     * @return  string  the diff of the two days.
+     * @return  int  the diff of the two days.
      */
     static public function diffDate($date1, $date2)
     {
@@ -278,7 +279,7 @@ class helper
      *  Judge a date is zero or not.
      * 
      * @access  public
-     * @return  date  today
+     * @return  bool
      */
     static public function isZeroDate($date)
     {
@@ -313,10 +314,10 @@ class helper
 /**
  *  The short alias of helper::createLink() method. 
  *
- * @param string $methodName  the method name
- * @param mixed  $vars        the vars to passed
- * @param string $viewType    
- * @return string
+ * @param  string        $methodName  the method name
+ * @param  string|array  $vars        the params passed to the method, can be array('key' => 'value') or key1=value1&key2=value2)
+ * @param  string        $viewType    
+ * @return string the link string.
  */
 function inLink($methodName = 'index', $vars = '', $viewType = '')
 {
@@ -342,7 +343,7 @@ function cycle($items)
  * Get current microtime.
  * 
  * @access protected
- * @return float        current time.
+ * @return float current time.
  */
 function getTime()
 {
diff --git a/framework/model.class.php b/framework/model.class.php
index 87ec8ce215..c5c8414133 100755
--- a/framework/model.class.php
+++ b/framework/model.class.php
@@ -137,7 +137,7 @@ class model
      * loaded by loadModel() so we must get the module name of thie model.
      * 
      * @access protected
-     * @return string       the module name.
+     * @return string the module name.
      */
     protected function getModuleName()
     {
@@ -168,7 +168,7 @@ class model
      * 
      * @param   string  $moduleName
      * @access  public
-     * @return  object  the model object
+     * @return  object|bool  the model object or false if model file not exists.
      */
     public function loadModel($moduleName)
     {
diff --git a/framework/router.class.php b/framework/router.class.php
index 50c35c14d5..2836eeb2c4 100755
--- a/framework/router.class.php
+++ b/framework/router.class.php
@@ -832,7 +832,7 @@ class router
      * 
      * @param   string  $varName    PATH_INFO, ORIG_PATH_INFO
      * @access  private
-     * @return  string   the PATH_INFO
+     * @return  string the PATH_INFO
      */
     private function getPathInfo($varName)
     {
@@ -867,7 +867,7 @@ class router
     /**
      * Get the $URL
      * 
-     * @param   bool $full  true, the URI contains the webRoot, else only hte URI.
+     * @param  bool $full  true, the URI contains the webRoot, else only hte URI.
      * @access public
      * @return string
      */
@@ -902,7 +902,7 @@ class router
      *  This method should called manually in the router file(www/index.php) after the $lang, $config, $dbh loadde.
      *
      * @access public
-     * @return object
+     * @return object|bool  the common control object or false if not exits.
      */
     public function loadCommon()
     {
@@ -966,9 +966,9 @@ class router
     /**
      * Get the path of one module.
      * 
-     * @param string $moduleName    the module name
+     * @param  string $moduleName    the module name
      * @access public
-     * @return string   the module path
+     * @return string the module path
      */
     public function getModulePath($moduleName = '')
     {
@@ -979,10 +979,10 @@ class router
     /**
      * Get extension path of one module.
      * 
-     * @param mixed $moduleName     the module name
-     * @param mixed $ext            the extension type, can be control|model|view|lang|config
-     * @access public
-     * @return string               the extension path.
+     * @param   string $moduleName     the module name
+     * @param   string $ext            the extension type, can be control|model|view|lang|config
+     * @access  public
+     * @return  string the extension path.
      */
     public function getModuleExtPath($moduleName, $ext)
     {
@@ -1066,7 +1066,7 @@ class router
      * 4. call the method by call_user_function_array
      * 
      * @access public
-     * @return void
+     * @return bool|object  if the module object of die.
      */
     public function loadModule()
     {
@@ -1172,7 +1172,7 @@ class router
      * @param   array $defaultParams     the default params defined by the method.
      * @param   array $passedParams      the params passed in through url.
      * @access  private
-     * @return  array
+     * @return  array the merged params.
      */
     private function mergeParams($defaultParams, $passedParams)
     {
@@ -1292,10 +1292,10 @@ class router
      * 
      * First search in $appLibRoot, then $coreLibRoot.
      *
-     * @param mixed $className  the class name
-     * @param mixed $static     statis class or not
-     * @access public
-     * @return object           the instance of the class
+     * @param   string $className  the class name
+     * @param   bool   $static     statis class or not
+     * @access  public
+     * @return  object|bool the instance of the class or just true.
      */
     public function loadClass($className, $static = false)
     {
@@ -1318,7 +1318,7 @@ class router
         helper::import($classFile);
 
         /* If staitc, return. */
-        if($static) return;
+        if($static) return true;
 
         /* Instance it. */
         global $$className;
@@ -1332,10 +1332,10 @@ class router
      * 
      * If the module is common, search in $configRoot, else in $modulePath.
      *
-     * @param mixed $moduleName     module name
-     * @param bool  $exitIfNone     exit or not
-     * @access public
-     * @return object
+     * @param   string $moduleName     module name
+     * @param   bool  $exitIfNone     exit or not
+     * @access  public
+     * @return  object|bool the config object or false.
      */
     public function loadConfig($moduleName, $exitIfNone = true)
     {
@@ -1357,7 +1357,7 @@ class router
         if(!file_exists($mainConfigFile))
         {
             if($exitIfNone) self::error("config file $mainConfigFile not found", __FILE__, __LINE__, true);
-            if(empty($extConfigFiles)) return;  //  and no extension file, exit.
+            if(empty($extConfigFiles)) return false;  //  and no extension file, exit.
             $configFiles = $extConfigFiles;
         }
         else
@@ -1402,9 +1402,9 @@ class router
     /**
      * Load lang and return it as the global lang object.
      * 
-     * @param mixed $moduleName     the module name
-     * @access public
-     * @return void
+     * @param   string $moduleName     the module name
+     * @access  public
+     * @return  bool|ojbect the lang object or false.
      */
     public function loadLang($moduleName)
     {
@@ -1416,7 +1416,7 @@ class router
         /* Set the files to includ. */
         if(!file_exists($mainLangFile))
         {
-            if(empty($extLangFiles)) return;  // also no extension file.
+            if(empty($extLangFiles)) return false;  // also no extension file.
             $langFiles = $extLangFiles;
         }
         else
@@ -1443,13 +1443,13 @@ class router
      * Connect to database.
      * 
      * @access public
-     * @return object
+     * @return object|bool the database handler.
      */
     public function connectDB()
     {
         global $config, $dbh;
         if(!isset($config->db->driver)) self::error('no pdo driver defined, it should be mysql or sqlite', __FILE__, __LINE__, $exit = true);
-        if(!isset($config->db->user)) return;
+        if(!isset($config->db->user)) return false;
         if($config->db->driver == 'mysql')
         {
             $dsn = "mysql:host={$config->db->host}; port={$config->db->port}; dbname={$config->db->name}";
@@ -1525,10 +1525,10 @@ class language
     /**
      * Show a member 
      * 
-     * @param mixed $obj    the object
-     * @param mixed $key    the key
-     * @access public
-     * @return void
+     * @param   object $obj    the object
+     * @param   string $key    the key
+     * @access  public
+     * @return  void
      */
     public function show($obj, $key)
     {
@@ -1547,9 +1547,9 @@ class super
     /**
      * Construct, set the var scope.
      * 
-     * @param mixed $scope  the score, can be server, post, get, cookie, session, global
-     * @access public
-     * @return void
+     * @param   string $scope  the score, can be server, post, get, cookie, session, global
+     * @access  public
+     * @return  void
      */
     public function __construct($scope)
     {
@@ -1559,10 +1559,10 @@ class super
     /**
      * Set one member value. 
      * 
-     * @param mixed $key    the key
-     * @param mixed $value  the value
-     * @access public
-     * @return void
+     * @param   string    the key
+     * @param   mixed $value  the value
+     * @access  public
+     * @return  void
      */
     public function set($key, $value)
     {
@@ -1599,9 +1599,9 @@ class super
     /**
      * The magic get method.
      * 
-     * @param mixed $key    the key
+     * @param  string $key    the key
      * @access public
-     * @return mixed
+     * @return mixed|bool return the value of the key or false.
      */
     public function __get($key)
     {