Update extend.func.php

修改静态发布错误提示，支持动态自动lat功能

src/system/extend.func.php

@@ -61,14 +61,17 @@ function obtainalt($newalt)
     global $dsql, $id, $aid;
     $myid = isset($id) ? $id : $aid;
     $row = $dsql->GetOne("SELECT title FROM `#@__archives` WHERE id='$myid'");
-    //图片注释自动为标题
-    $newalt = str_ireplace(array('alt=""', 'alt=\'\'', 'title=""', 'title=\'\''), "", $newalt);
-    $newalt = str_ireplace("<img", "<img alt=\"".$row['title']."\" title=\"".$row['title']."\"", $newalt);
-    //去掉图片宽度和高度
-    $newalt = preg_replace("/style=\"width\:(.*)\"/", "", $newalt);
-    //去掉结尾
-    $newalt = str_ireplace("  ", " ", $newalt);
-    $newalt = str_ireplace(" /", "", $newalt);
+    //检查$row是否为有效的数组并且包含title
+    if (is_array($row) && isset($row['title'])) {
+        //图片注释自动为标题
+        $newalt = str_ireplace(array('alt=""', "alt=''", 'title=""', "title=''"), "", $newalt);
+        $newalt = str_ireplace("<img", "<img alt=\"".$row['title']."\" title=\"".$row['title']."\"", $newalt);
+        //去掉图片宽度和高度
+        $newalt = preg_replace("/style=\"width\:(.*)\"/", "", $newalt);
+        //去掉结尾多余的空格和斜杠
+        $newalt = str_ireplace("  ", " ", $newalt);
+        $newalt = str_ireplace(" /", "", $newalt);
+    }
     return $newalt;
 }
 //联动单筛选{dede:php}obtainfilter(模型id,类型,'字段1,字段2');{/dede:php}类型表示前台展现方式，对应case值，例如：文档模型style字段radio选项卡类型，列表附加字段类别添加style，标签调用{dede:php}obtainfilter(1,1,'style');{/dede:php}