PHP 异常导致 nginx 将虚拟主机泄漏到彼此中

我的服务器上设置了多个 nginx 虚拟主机。tershronalds.com 正在运行 vanilla wordpress 4.3，而 staging.ninjawars.net 正在运行自定义 php 代码库。两者都依赖于 php5-fpm。

如果没有触发 php 错误或异常，则两个站点似乎都可以正常运行。对于 tershronalds.com wordpress，几乎没有错误或异常，通常没有问题。staging.ninjawars.net 自定义 php 代码库使用 auto_prepend_file 预先加载各种库：

fastcgi_param PHP_VALUE "auto_prepend_file=/path/to/ninjawars/deploy/lib/base.inc.php \n session.cookie_domain=staging.ninjawars.net \n date.timezone=America/New_York \n default_charset=UTF-8 \n";

但是，如果自定义 php 代码库出错或发生异常，则 nginx 开始出现异常！它开始在虚拟主机之间共享配置，破坏 tershronalds.com wordpress 站点：

2015/09/04 13:37:58 [error] 13145#0: *17413 FastCGI sent in stderr:
"PHP message: PHP Fatal error:  Cannot redeclare validate_username() (previously declared in /path/to/ninjawars/deploy/lib/control/lib_auth.php:317) in /path/to/tersh/www/wp-includes/user.php on line 1792" while reading response header from upstream, client: 10.183.252.21, server: tershronalds.com, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "tershronalds.com"

换句话说，nginx 发疯了，wordpress 网站开始崩溃，因为它包含来自 ninjawars 自定义代码库的代码，导致重复功能！

我曾想过尝试升级 nginx 以解决它，但 nginx 似乎是最新版本，与 php5-fpm 相同（也许）。虚拟主机配置实际上有效并且似乎有效...... ...直到发生 php 错误/异常。我还应该研究什么来尝试解决这种错误行为？

软件版本信息：

apt-cache policy nginx nginx:   Installed: 1.4.6-1ubuntu3.3   Candidate: 1.4.6-1ubuntu3.3   Version table:  *** 1.4.6-1ubuntu3.3 0
        500 http://mirror.rackspace.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.4.6-1ubuntu3.1 0
        500 http://mirror.rackspace.com/ubuntu/ trusty-security/main amd64 Packages
     1.4.6-1ubuntu3 0
        500 http://mirror.rackspace.com/ubuntu/ trusty/main amd64 Packages admin@megaman:~$ apt-cache policy php5-fpm php5-fpm:   Installed: 5.5.9+dfsg-1ubuntu4.11   Candidate: 5.5.9+dfsg-1ubuntu4.11  Version table:  *** 5.5.9+dfsg-1ubuntu4.11 0
        500 http://mirror.rackspace.com/ubuntu/ trusty-updates/universe amd64 Packages
        500 http://mirror.rackspace.com/ubuntu/ trusty-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     5.5.9+dfsg-1ubuntu4 0
        500 http://mirror.rackspace.com/ubuntu/ trusty/universe amd64 Packages

wordpress 版本是最新的 4.3，我并不认为这是一个相关因素。

编辑如果我关闭这个 nginx 虚拟主机配置，一切正常（当然，除了 staging.ninjawars.net 子域完全关闭）。

Staging.ninjawars.net：

server {
        listen 80;
        server_name staging.ninjawars.net www.ninjawars.net ninjawars.net nw.local nw.remote;

        root /path/to/ninjawars/deploy/www;

        error_page 404 /404.php;

        # redirect server error pages to the static page /50x.html
        #
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
                root /usr/share/nginx/html;
        }

        index index.php;

        location / {
                try_files $uri $uri/ =404; # /index.php?$args;
        }

        location ~ \.php$ {
                fastcgi_param PHP_VALUE "auto_prepend_file=/path/to/ninjawars/deploy/lib/base.inc.php \n session.cookie_domain=staging.ninjawars.net \n date.timezone=America/New_York \n default_charset=UTF-8 \n";
                try_files $uri =404;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include fastcgi_params;
        }
}

这是更长的时间并将所有内容重定向到

无 www，https 域 tershronalds.com 站点：

server {
    listen 80;
    server_name         tershronalds.com;
    return 301          https://tershronalds.com$request_uri;
}
server {
    listen 80;
    server_name         www.tershronalds.com;
    return 301          https://tershronalds.com$request_uri;
}
server {
    listen 80;
    server_name         tershronalds.net www.tershronalds.net tershart.net www.tershart.net;
    return 302          https://tershronalds.com$request_uri;
    # Temporarily redirect these domains for now.
}

server {
    listen 443 ssl;
    server_name tershronalds.com www.tershronalds.com tersh.remote;
    root /path/to/tersh/www;
    index index.php

#   ssl_session_timeout 5m;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_prefer_server_ciphers on;
    ssl_ciphers various_cyphers_here
    ssl_certificate /somecrt;
    ssl_certificate_key /somekey;


    #location / {
        # First attempt to serve request as file, then
        # as directory, then fall back to displaying a 404.
        #try_files $uri $uri/ =404;
        # Uncomment to enable naxsi on this location
        # include /etc/nginx/naxsi.rules
    #}


    error_page 404 /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }

    error_page  401  https://tershronalds.com/forbidden.html;

    # Standard wordpress includes !!!
    include global/wordpress.conf;


    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
        deny all;
    }
}