无论 NGINX 状态代码如何，PHP-FPM 始终返回 200

Question

我有一个使用 NGINX 和 PHP-FPM 的基于 PHP 的错误页面配置。但是，例如，当我请求example.com/nothing（不存在的页面）时，PHP-FPM 返回 200 状态代码，而不是 NGINX 返回的正确 404 状态代码。其他错误也会发生这种情况（例如：example.com/assets当 NGINX 的状态为 403 时，PHP-FPM 返回 200）。本质上，我希望 PHP-FPM 做的是镜像 NGINX 显示的状态代码（用 NGINX 显示的状态代码覆盖 200 状态代码），因此我的错误页面显示正确的信息。我知道您可以通过在使用时指定状态代码来更改状态代码http_response_code();，但我宁愿让服务器执行此操作，而不让我硬编码正确的状态代码。

错误页面：<? echo http_response_code(); ?>

NGINX 错误页面配置：

set $errorDocs "/var/www/GLOBAL_RESOURCES/error";
recursive_error_pages on;
location ^~ $errorDocs {
  internal;
  alias $errorDocs;
}
#Resolve error asset location 404s
location /errorAssets {
  root $errorDocs;
}
error_page 404 /404.php;
location = /404.php {
  root $errorDocs;
  include /etc/nginx/xenon-conf/headers/fpm-params.conf;
}

PHP-FPM 设置：

include /etc/nginx/fastcgi_params;
include /etc/nginx/fastcgi.conf;
fastcgi_intercept_errors on;
proxy_intercept_errors on;
try_files $uri =404; 
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass  unix:/var/run/php-fpm/www.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;

快速 CGI 配置：

fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name;
fastcgi_param  QUERY_STRING       $query_string;
fastcgi_param  REQUEST_METHOD     $request_method;
fastcgi_param  CONTENT_TYPE       $content_type;
fastcgi_param  CONTENT_LENGTH     $content_length;

fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
fastcgi_param  REQUEST_URI        $request_uri;
fastcgi_param  DOCUMENT_URI       $document_uri;
fastcgi_param  DOCUMENT_ROOT      $document_root;
fastcgi_param  SERVER_PROTOCOL    $server_protocol;
fastcgi_param  REQUEST_SCHEME     $scheme;
fastcgi_param  HTTPS              $https if_not_empty;

fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
fastcgi_param  SERVER_SOFTWARE    nginx;

fastcgi_param  REMOTE_ADDR        $remote_addr;
fastcgi_param  REMOTE_PORT        $remote_port;
fastcgi_param  SERVER_ADDR        $server_addr;
fastcgi_param  SERVER_PORT        $server_port;
fastcgi_param  SERVER_NAME        $server_name;

# PHP only, required if PHP was built with --enable-force-cgi-redirect
#fastcgi_param  REDIRECT_STATUS    200; 

网站配置：

server {
  listen 80;
  server_name example.com www.example.com;
  access_log /var/log/nginx/example.com.access.log;
  include /etc/nginx/xenon-conf/headers/php-fpm-enable.conf;
  include /etc/nginx/xenon-conf/headers/master-failover.conf;

  set $webRoot "/var/www/example.com";
  root $webRoot;
}

NGINX 配置：

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
  worker_connections 1024;
}

http {
  log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                  '$status $body_bytes_sent "$http_referer" '
                  '"$http_user_agent" "$http_x_forwarded_for"';

  access_log  /var/log/nginx/access.log  main;

  sendfile            on;
  tcp_nopush          on;
  tcp_nodelay         on;
  keepalive_timeout   65;
  types_hash_max_size 4096;

  include             /etc/nginx/mime.types;
  default_type        application/octet-stream;

  # Load modular configuration files from the /etc/nginx/conf.d directory.
  # See http://nginx.org/en/docs/ngx_core_module.html#include
  # for more information.
  include /etc/nginx/conf.d/*.conf;

  ### CUSTOM HTTP SERVER MASS IMPORTS ###
  include /etc/nginx/xenon-conf/websites/*.web;
  include /etc/nginx/xenon-conf/mapping/*.map;
}

### CUSTOM GENERIC STREAM MASS IMPORTS ###
include /etc/nginx/xenon-conf/stream/*.conf;

提前致谢！

Answer 1

如果 nginx 检测到来自 FastCGI 上游的输出，即使上游（在本例中为 php-fpm）触发了错误，它也会将其视为有效响应。

display_errors在 PHP-FPM 池中禁用可以修复此问题。

php_admin_value[display_errors] = Off它可以防止 PHP 脚本在屏幕上显示错误输出，从而导致 nginx 正确抛出 HTTP 500 内部服务器错误。

$  curl -i localhost:8080/test.php?time=`date +%s` HTTP/1.1 500
Internal Server Error Server: nginx ...

（不显示输出，空响应）您仍然可以使用 error_log 指令将所有错误记录到文件中。

php_admin_value[error_log] = /var/log/php-fpm/error.log
php_admin_flag[log_errors] = on

-来源

为了将 HTTP 状态代码从 nginx 传递到 PHP-FPM，您还需要将以下内容放入 PHP 处理位置：

fastcgi_intercept_errors on;

根据手册，该指令：

确定代码大于或等于 300 的 FastCGI 服务器响应是否应该传递给客户端，或者被拦截并重定向到 nginx 以使用 error_page 指令进行处理。