解决一次Typecho站点的502

环境

• PHP 7.4
• Nginx 1.19
• MySQL 5.6
• Typecho v1.1-17.10.30-release

访问任何/index.php/action/someAction?args都会502，最开始猜想是伪静态的问题，但是转念一想伪静态导致的是404，排除掉。

迁移前后Nginx、Mysql、PHP的版本都不一样，由于只是弄着玩的，安装太耗时间，不打算一个一个实验，直接将Typecho更新到v1.2-dev，php到8.0。

在问题之前的404

2022/01/21 18:38:27 [error] 388901#0: *43 FastCGI sent in stderr: "PHP message: PHP Warning:  Unknown: open_basedir restriction in effect. File(/www/wwwroot/Typecho/index.php) is not within the allowed path(s): (/www/wwwroot/private_Typecho/:/tmp/) in Unknown on line 0PHP message: PHP Warning:  Unknown: failed to open stream: Operation not permitted in Unknown on line 0Unable to open primary script: /www/wwwroot/Typecho/index.php (Operation not permitted)" while reading response header from upstream, client: 103.97.200.98, server: x.std.moe, request: "GET / HTTP/2.0", upstream: "fastcgi://unix:/tmp/php-cgi-74.sock:", host: "x.std.moe"

.user.ini中设置的open_basedir=与当前路径不匹配，原因是我直接复制粘贴了迁移站点。

更改后，可以正常访问文章和后台界面。

问题1

*402 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Declaration of Title_Plugin::label($value) must be compatible with Typecho\Widget\Helper\Form\Element::label(string $value): Typecho\Widget\Helper\Form\Element in /www/wwwroot/Typecho/usr/plugins/Handsome/Plugin.php on line 1220"

原因是我迁移前是php5.6，迁移后是php7.4，不严谨的语法会直接fatal error..

遂更新主题至最新版本。

问题2

*258 FastCGI sent in stderr: "PHP message: PHP Warning:  Array to string conversion in /www/wwwroot/Typecho/var/Typecho/Http/Client.php on line 306" while reading response header from upstream

导致502的元凶。这个error在将数组转换为字符串时抛出，例如：

$num = 9;
print("$num");
// 9 ..

$arr = [1,2,3,4,5];
print("$arr")
// Err! Array to string conversion ..