WordPress安装插件后损坏

Question

我安装了这个插件https://wordpress.org/plugins/wp-gallery-custom-links/，在安装过程中出现错误，在页面刷新之前我没有时间阅读。

现在我的媒体选择器根本没有加载。

我完全删除了插件，没有运气，现在我什至无法再访问 wp-admin。收到如下错误：

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxx.com/httpdocs/wp-includes/pluggable.php on line 1196

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxx.com/httpdocs/wp-login.php on line 425

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxxx.com/httpdocs/wp-login.php on line 438

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxxxx.com/httpdocs/wp-login.php on line 425

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxxxx.com/httpdocs/wp-login.php on line 438

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/caroli.hosterspace.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxxxxx.com/httpdocs/wp-includes/pluggable.php on line 925

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxxxxxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxxx.com/httpdocs/wp-includes/pluggable.php on line 926

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxxxx.com/httpdocs/wp-includes/pluggable.php on line 927

Warning: Cannot modify header information - headers already sent by (output started at /var/www/vhosts/xxxxxxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1) in /var/www/vhosts/xxxxxx.com/httpdocs/wp-includes/pluggable.php on line 1196

我已经下载了 wordpress 的新副本并替换了 wp-admin 文件夹、wp-includes 文件夹、wp-config.php 文件、wp-login.php 文件。

我尝试在插件文件夹上更改名称，但仍然不起作用，我尝试删除我的主题以访问 wp-admin，但仍然不起作用。

我怀疑它可能是数据库，但我运气不好找到问题..有人可以帮忙吗？

Answer 1

Cannot modify header information - headers already sent by

表示在到达脚本末尾之前，某个文件中已经有一些文本发送到浏览器。

output started at /var/www/vhosts/xxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1

检查该文件，<?php 代码开始声明之前的文件开头可能有一个空格。

我在文件的开头没有空格，可能罪魁祸首是UTF BOM，你应该在文本编辑器的帮助下删除它，例如Notepad++有一个选项可以做到这一点（编码->转换为 UTF-8)。

Answer 2

我已经多次遇到这个问题，正如 Vaviloff 所说，在文件开头（<?php 之前）放置一个空格是您要查找的内容。

一些可能的原因：

• 一个损坏的插件
• 损坏的主题
• 您的 Wordpress 安装被入侵（您会在文件开头看到一些 eval()）

可能的解决方案：

• 检查相关文件：/var/www/vhosts/xxxx.com/httpdocs/wp-content/themes/caroli/functions.php:1 并删除<?php之前的空格
• 禁用您已安装的最新插件以查看它是否有任何作用
• 运行一个像 Wordfence 这样的插件（以防万一），它会扫描你的文件 比您手动操作更快并检查与 WP 核心的差异或查找可疑代码（免费版本可以完成所有这些操作）

编辑： 我刚刚看到您无法访问 wp-admin。这很棘手，但我曾经遇到过同样的问题。好吧，这是一次入侵（由于一个过时的插件）。

我做了什么？

• 我的主题的备份
• 我的数据库的备份
• 我上传的备份
• 已安装插件列表
• 已更改所有密码
• 删除了服务器的所有相关部分（所有备份之后）
• 重新安装新的 WP
• 已恢复主题/数据库/上传/插件（安装插件时检查插件的最新更新）
• 安装 Wordfence，以防万一