diff --git a/admin/common.php b/admin/common.php
index e3a67023..371ac64f 100644
--- a/admin/common.php
+++ b/admin/common.php
@@ -47,7 +47,7 @@ if (!$user->logged && !Typecho_Cookie::get('__typecho_first_run') && !empty($cur
         $mustUpgrade = (!defined('Typecho_Common::VERSION') || version_compare(str_replace('/', '.', Typecho_Common::VERSION),
         str_replace('/', '.', $options->version), '>'));
 
-        if ($mustUpgrade && 'upgrade.php' != $adminFile) {
+        if ($mustUpgrade && 'upgrade.php' != $adminFile && 'backup.php' != $adminFile) {
             $response->redirect(Typecho_Common::url('upgrade.php', $options->adminUrl));
         } else if (!$mustUpgrade && 'upgrade.php' == $adminFile) {
             $response->redirect($options->adminUrl);
diff --git a/admin/upgrade.php b/admin/upgrade.php
index 718d47a0..a4565566 100644
--- a/admin/upgrade.php
+++ b/admin/upgrade.php
@@ -17,7 +17,7 @@ include 'menu.php';
                     <ul>
                         <li><?php _e('您已经更新了系统程序, 我们还需要执行一些后续步骤来完成升级'); ?></li>
                         <li><?php _e('此程序将把您的系统从 <strong>%s</strong> 升级到 <strong>%s</strong>', $options->version, Typecho_Common::VERSION); ?></li>
-                        <li><strong class="warning"><?php _e('在升级之前强烈建议先备份您的数据'); ?></strong></li>
+                        <li><strong class="warning"><?php _e('在升级之前强烈建议先<a href="%s">备份您的数据</a>', Typecho_Common::url('backup.php', $options->adminUrl)); ?></strong></li>
                     </ul>
                     <p><button class="btn primary" type="submit"><?php _e('完成升级 &raquo;'); ?></button></p>
                     </form>
diff --git a/var/Typecho/Common.php b/var/Typecho/Common.php
index 83d10c66..b1132619 100644
--- a/var/Typecho/Common.php
+++ b/var/Typecho/Common.php
@@ -1120,7 +1120,7 @@ EOF;
         $address = gethostbyname($host);
         $inet = inet_pton($address);
 
-        if ($inet === false) {
+        if (false === $inet) {
             // 有可能是ipv6的地址
             $records = dns_get_record($host, DNS_AAAA);
 
diff --git a/var/Widget/Backup.php b/var/Widget/Backup.php
index 6eed4988..ece7be34 100644
--- a/var/Widget/Backup.php
+++ b/var/Widget/Backup.php
@@ -65,7 +65,6 @@ class Widget_Backup extends Widget_Abstract_Options implements Widget_Interface_
     private function extractData($file)
     {
         $fp = @fopen($file, 'rb');
-        $end = false;
 
         if (!$fp) {
             $this->widget('Widget_Notice')->set(_t('无法读取备份文件'), 'error');