diff --git a/controller/Controller.php b/controller/Controller.php
index 478650c..ea9e4af 100644
--- a/controller/Controller.php
+++ b/controller/Controller.php
@@ -131,7 +131,7 @@ Class Controller {
     }
 
     //get params by key
-    protected function get($key = '', $defaultValue = '') {   
+    protected function get($key = '', $defaultValue = '') {
         if (empty($key)) {
             return $_GET;
         }
@@ -139,7 +139,7 @@ Class Controller {
     }
 
     //post params by key
-    protected function post($key = '', $defaultValue = '') {   
+    protected function post($key = '', $defaultValue = '') {
         if (empty($key)) {
             return $_POST;
         }
@@ -147,7 +147,7 @@ Class Controller {
     }
 
     //debug log
-    protected function logTimeCost() {   
+    protected function logTimeCost() {
         if (!empty(FSC::$app['config']['debug'])) {
             $end_time = microtime(true);
             $timeCost = ceil( ($end_time - FSC::$app['start_time']) * 1000 );   //ms
@@ -163,7 +163,7 @@ Class Controller {
     }
 
     //error log
-    protected function logError($error_message) {   
+    protected function logError($error_message) {
         if (!empty(FSC::$app['config']['debug'])) {
             $thisUrl = FSC::$app['requestUrl'];
             $logTime = date('Y-m-d H:i:s');
@@ -172,7 +172,7 @@ Class Controller {
             $logOk = @error_log("{$logTime}\t{$thisUrl}\tERROR: {$error_message}\n", 3, "{$logDir}{$logFilename}");
             if (!$logOk) {      //try to mkdir
                 @mkdir($logDir, 0700, true);
-                @error_log("{$logTime}\t{$thisUrl}\ttERROR: {$error_message} ms\n", 3, "{$logDir}{$logFilename}");
+                @error_log("{$logTime}\t{$thisUrl}\tERROR: {$error_message}\n", 3, "{$logDir}{$logFilename}");
             }
         }
     }
@@ -245,7 +245,7 @@ Class Controller {
 
     //set cookie for message show
     //type: info, warning, danger, success
-    protected function sendMsgToClient($msg, $type = 'info') {   
+    protected function sendMsgToClient($msg, $type = 'info') {
         $cookieKey = "alert_msg_{$type}";
         $expires = time() + 15;
         $path = '/';
diff --git a/plugins/Common.php b/plugins/Common.php
new file mode 100644
index 0000000..bc0b269
--- /dev/null
+++ b/plugins/Common.php
@@ -0,0 +1,34 @@
+<?php
+/**
+ * 常用的公用方法
+ */
+Class Common {
+	public static function isCellphoneNumber($number) {
+        return preg_match("/^1[3456789][0-9]{9}$/", $number);
+    }
+
+    //朋友手机号码的末 6 位
+    public static function isFriendsCode($number) {
+        return preg_match("/^[0-9]{6}$/", $number);
+    }
+
+    //用户注册成功后，保存他的手机号码 6 位尾号作为邀请码
+    protected function saveFriendsCode($cellphone) {
+        $logTime = date('Y-m-d H:i:s');
+        $logDir = __DIR__ . '/../runtime/friendscode/';
+        $logFilename = substr($cellphone, -6) . '.log';
+        $logOk = @error_log("{$logTime} created\n", 3, "{$logDir}{$logFilename}");
+        if (!$logOk) {      //try to mkdir
+            @mkdir($logDir, 0700, true);
+            @error_log("{$logTime} created\n", 3, "{$logDir}{$logFilename}");
+        }
+    }
+
+    protected function existFriendsCode($code) {
+        if (self::isFriendsCode($code) == false) {return false;}
+        $logDir = __DIR__ . '/../runtime/friendscode/';
+        $logFilename = "{$logDir}{$code}.log";
+        return file_exists($logFilename);
+    }
+
+}
\ No newline at end of file
diff --git a/themes/tajian/controller/FrontapiController.php b/themes/tajian/controller/FrontapiController.php
index d0feec3..062bacf 100644
--- a/themes/tajian/controller/FrontapiController.php
+++ b/themes/tajian/controller/FrontapiController.php
@@ -5,6 +5,7 @@
 require_once __DIR__ . '/../../../lib/DirScanner.php';
 require_once __DIR__ . '/../../../plugins/Parsedown.php';
 require_once __DIR__ . '/../../../plugins/Html.php';
+require_once __DIR__ . '/../../../plugins/Common.php';
 require_once __DIR__ . '/SiteController.php';
 
 Class FrontApiController extends SiteController {
@@ -444,8 +445,34 @@ eof;
             throw new Exception('Oops，操作太快了，请喝杯咖啡休息会吧...');
         }
 
-        echo "Building...";
-        exit;
+        //返回给视图的变量
+        $code = 1;
+        $msg = '';
+        $err = '';
+        $newUser = array();
+
+        //用户提交的数据检查
+        $postParams = $this->post();
+        if (!empty($postParams)) {
+            $friends_code = $this->post('friendscode', '');
+            $cellphone = $this->post('username', '');
+            $sms_code = $this->post('smscode', '');
+
+            if (empty($friends_code) || empty($cellphone) || empty($sms_code)) {
+                $err = "请填写注册邀请码、手机号码和短信验证码哦";
+            }else if (Common::isCellphoneNumber($cellphone) == false) {
+                $err = "手机号码格式错误，请填写正确的手机号码";
+            }else if (Common::isFriendsCode($friends_code) == false) {
+                $err = "邀请码格式错误，请填写邀请你的朋友的手机号码末 6 位，还可以加客服微信索取";
+            }else if (Common::existFriendsCode($friends_code) == false) {
+                $err = "邀请码不存在，请填写邀请你的朋友的手机号码末 6 位，或者加客服微信索取";
+            }
+
+            //TODO: 验证短信验证码是否正确
+
+        }
+
+        return $this->renderJson(compact('code', 'msg', 'err', 'data'));
     }
 
     //用户登录
diff --git a/themes/tajian/views/site/login.php b/themes/tajian/views/site/login.php
index 118bb5c..011cd5c 100644
--- a/themes/tajian/views/site/login.php
+++ b/themes/tajian/views/site/login.php
@@ -6,7 +6,7 @@
         </div>
         <div class="mb-3 twocol">
             <label for="text_input_sm" class="form-label">验证码</label>
-            <input id="text_input_sm" name="friendscode" placeholder="输入收到的短信验证码">
+            <input id="text_input_sm" name="smscode" placeholder="输入收到的短信验证码">
             <button disabled="disabled">发送验证码</button>
         </div>
         <div class="avform_bt vercenter">
diff --git a/themes/tajian/views/site/register.php b/themes/tajian/views/site/register.php
index 21493d2..01878be 100644
--- a/themes/tajian/views/site/register.php
+++ b/themes/tajian/views/site/register.php
@@ -14,7 +14,7 @@
         </div>
         <div class="mb-3 twocol">
             <label for="text_input_sm" class="form-label">验证码</label>
-            <input id="text_input_sm" name="friendscode" placeholder="输入收到的短信验证码">
+            <input id="text_input_sm" name="smscode" placeholder="输入收到的短信验证码">
             <button disabled="disabled" type="button">发送验证码</button>
         </div>
         <div class="avform_bt vercenter">