nginx配置中，关于php的配置有错会导致nginx无法访问php。
找不到访问php找不到文件，修改下面配置
nginx.conf：
location ~ \.php$ {
proxy_pass http://127.0.0.1:80;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
#fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
#fastcgi_param SCRIPT_FILENAME /$document_root$fastcgi_script_name;
fastcgi_param SCRIPT_FILENAME /usr/share/nginx/html$fastcgi_script_name;
include fastcgi_params;
}