diff --git a/app/Libs/MQTTClient.php b/app/Libs/MQTTClient.php
index d2a9490..56584c0 100644
--- a/app/Libs/MQTTClient.php
+++ b/app/Libs/MQTTClient.php
@@ -322,7 +322,7 @@ class MQTTClient {
         }
 
         // Set socket timeout
-        ini_set('default_socket_timeout', 10);
+        ini_set('default_socket_timeout', '10');
         stream_set_timeout($this->socket, 0, $this->socketTimeout * 1000);
         // Set stream to non-blocking mode, ie do not wait to read if stream is empty
         stream_set_blocking($this->socket, true);
diff --git a/app/Service/FeiePrintService.php b/app/Service/FeiePrintService.php
index 0b1f1aa..0a7365d 100644
--- a/app/Service/FeiePrintService.php
+++ b/app/Service/FeiePrintService.php
@@ -141,7 +141,7 @@ class FeiePrintService implements FeiePrintServiceInterface
                         $m = $m+$j;
                         $tail = $new;
                         // $lenght = iconv("UTF-8", "GBK//IGNORE", $new);
-                        $k = $A - mb_strlen($new);
+                        $k = $A - mb_strlen($new,'utf-8');
                         for($q=0;$q<$k;$q++){
                             $kw3 .= ' ';
                         }
@@ -166,7 +166,7 @@ class FeiePrintService implements FeiePrintServiceInterface
             foreach ($result as $key=>$value) {
                 if($key < 1){
                     // $v_lenght = iconv("UTF-8", "GBK//IGNORE", $value);
-                    $v_lenght = mb_strlen($value);
+                    $v_lenght = mb_strlen($value,'utf-8');
                     if($v_lenght == 13) $value = $value." ";
                     $head .= $value.' '.$price.' '.$num.' '.$prices;
                 }else{
@@ -213,7 +213,7 @@ class FeiePrintService implements FeiePrintServiceInterface
         $str = $user_name . $total;
         $kw5 = '';
         // $lenght = iconv("UTF-8", "GBK//IGNORE", $str);
-        $total_len = 32 - mb_strlen($str);
+        $total_len = 32 - mb_strlen($str,'utf-8');
         for ($q = 0; $q < $total_len; $q++) {
             $kw5 .= ' ';
         }
diff --git a/app/TaskWorker/MQTTClientTask.php b/app/TaskWorker/MQTTClientTask.php
index f751cdc..e49f562 100644
--- a/app/TaskWorker/MQTTClientTask.php
+++ b/app/TaskWorker/MQTTClientTask.php
@@ -41,7 +41,7 @@ class MQTTClientTask
             $topic .= '/'.$toClientId;
         }
 
-        $curClientId OR $curClientId = rand(1,999999999);
+        $curClientId OR $curClientId = (string)rand(1,999999999);
         $success = $this->mqttClient->sendConnect($curClientId);
 
         if ($success) {