在用虚拟机搭建环境的时候，出现访问php文件无法获取到。总是报错Primary script unknown，但是静态文件是可以正常访问的。通过排查日志，检查个服务是否正常等方法终于找到解决的方法。
报错如下：
FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream
详细报错如下：
2017/05/11 10:26:45 [error] 5475#5475: *1 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: 192.168.1.194, server: demo.demo.com, request: "GET /index.php HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "localhost"
一、检查所需的服务是否都正常。
service nginx status service php-fpm status netstat -antp
此处常规的排错，就一笔带过。
二、修改nginx网站的配置。
默认的情况下文件地址在：/etc/nginx/conf.d/default.conf
默认配置：
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
#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;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}将其修改为：
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main;
location / {
root /usr/share/nginx/html;
index index.php index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
location ~ \.php$ {
root /usr/share/nginx/html;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}因为默认情况下，php服务都是注释掉的，我们将其打开(去掉前面#即可)，然后修改root、fastcgi_param这两个配置项。配置的root参数是我们网站文件放置的路径。
配置设置完成后，记得重新启动服务。
service nginx restart
通过上面的排查和配置，就可以解决nginx下php无法访问报错Primary script unknown的问题。
