nginx+PHP5.6安装完成后,成功开启pdo_oci扩展，链接oracle数据库，命令行运行测试文件正常，浏览器访问报502，如图，selinux已禁用

下面分别是access.log

和error.log

这是nginx配置文件

server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.php index.html index.htm;

    location / {
        try_files $uri $uri/ =404;
    }
    error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
    location ~ .php$ {
        try_files $uri =404;
        fastcgi_pass 127.0.0.1:9000;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi.conf;
    }
}

web访问localhost/index.php【打印phpinfo()】正常：

求大神告知web访问test.php报502的原因
补充：访问localhost/test.php时会有如下弹窗提示：发生一个错误

点击查看“报告”如下