fix #1268

.github/workflows/Typecho-dev-Ci.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['7.2', '7.3', '7.4', '8.0']
+        php: ['7.2', '7.3', '7.4', '8.0', '8.1']
     steps:
     - name: Checkout code
       uses: actions/checkout@v2

var/Typecho/Common.php

@@ -182,8 +182,10 @@ namespace Typecho {
          */
         public static function url(?string $path, ?string $prefix): string
         {
+            $path = $path ?? '';
             $path = (0 === strpos($path, './')) ? substr($path, 2) : $path;
-            return rtrim($prefix, '/') . '/' . str_replace('//', '/', ltrim($path, '/'));
+            return rtrim($prefix ?? '', '/') . '/'
+                . str_replace('//', '/', ltrim($path, '/'));
         }
 
         /**

var/Typecho/Db/Adapter/QueryTrait.php

@@ -20,10 +20,10 @@ trait QueryTrait
             }
         }
 
-        $sql['limit'] = (0 == strlen($sql['limit'])) ? null : ' LIMIT ' . $sql['limit'];
-        $sql['offset'] = (0 == strlen($sql['offset'])) ? null : ' OFFSET ' . $sql['offset'];
+        $sql['limit'] = isset($sql['limit']) ? ' LIMIT ' . $sql['limit'] : '';
+        $sql['offset'] = isset($sql['offset']) ? ' OFFSET ' . $sql['offset'] : '';
 
         return 'SELECT ' . $sql['fields'] . ' FROM ' . $sql['table'] .
             $sql['where'] . $sql['group'] . $sql['having'] . $sql['order'] . $sql['limit'] . $sql['offset'];
     }
-}
+}

var/Widget/Base/Contents.php

@@ -585,7 +585,7 @@ class Contents extends Base implements QueryInterface
 
         /** 处理密码保护流程 */
         if (
-            strlen($value['password']) > 0 &&
+            strlen($value['password'] ?? '') > 0 &&
             $value['password'] !== Cookie::get('protectPassword_' . $value['cid']) &&
             $value['authorId'] != $this->user->uid &&
             !$this->user->pass('editor', true)