在中小企業中，LAMP架構被廣泛使用。而對於高併發請求的情形，其Web伺服器通常以Nginx居多，因此LNMP組合架構也非常普遍。在LAMP架構中，Apache可以使用三種方式與PHP連線通訊，即以模組化的方式，CGI（已不再使用）以及FastCGI。那對於Nginx而言，則可以使用FastCGI方式，即反向代理方式，將PHP程式碼有FastCGI轉交給PHP直譯器進行處理。本文描述配置Nginx到PHP的連線。

一、環境準備

二、演示環境

###當前環境為CentOS 6.7，本演示配置適用於CentOS 7下配置nginx連線PHP。
# cat /etc/redhat-release 
 

CentOS release 6.7 (Final)

# nginx -v
nginx version: nginx/1.8.1

# service nginx start
Starting nginx:                   [  OK  ]

# ss -nltp|grep nginx
LISTEN     0      128   *:8001      *:*      users:(("nginx",2168,6),("nginx",2171,6))

# service php-fpm start           
Starting php-fpm  done

# ss -nltp|grep php
 

LISTEN  0  128 127.0.0.1:9000  *:* users:(("php-fpm",2255,9),("php-fpm",2256,0),("php-fpm",2257,0))

# php -v
PHP 5.6.9 (cli) (built: Jul 17 2016 18:45:50) 
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2015 Zend Technologies
    with XCache v3.2.0, Copyright (c) 2005-2014, by mOo
    with XCache Optimizer v3.2
 
.0, Copyright (c) 2005-2014, by mOo
    with XCache Cacher v3.2.0, Copyright (c) 2005-2014, by mOo

三、配置nginx

1、編輯/etc/nginx


/nginx.conf，啟用如下選項：
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;
        }

在所支援的主頁面格式中新增php格式的主頁，類似如下：
location / {
            root   html;
            index  index.php index.html index.htm;
        }

2、編輯/etc/nginx/fastcgi_params，將其內容更改為如下內容：
# cp /etc/nginx/fastcgi_params /etc/nginx/fastcgi_params.bk
# cat /dev/null>/etc/nginx/fastcgi_params
# vim /etc/nginx/fastcgi_params
fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
fastcgi_param  SERVER_SOFTWARE    nginx;
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_FILENAME    $document_root$fastcgi_script_name;
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  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;

3、重新載入nginx的配置檔案：
# nginx -t               
# service nginx reload   

四、驗證

1、在/etc/nginx/html新建index.php的測試頁面，


測試php是否能正常工作：
# vi /etc/nginx/html/index.php 
<?php                 ### Author : Leshami
phpinfo();            ### Blog   : http://blog.csdn.net/leshami
?>

2、通過瀏覽測試php頁面

瀏覽器開啟 http://192.168.1.245:8001

也可以使用如下方式測試
# curl -I http://192.168.1.245:8001
HTTP/1.1 200 OK                   
Server: nginx/1.8.1
Date: Tue, 19 Jul 2016 03:29:44 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
X-Powered-By: PHP/5.6.9

3、訪問mysql資料庫
#yum install php-mysql（安裝php的mysql驅動）

vim /etc/nginx/html/connmysql.php
<?php
        $conn = mysql_connect('192.168.1.242','robin','xxx');
        if ($conn)
                echo "succ";
        else
                echo "failute";

        mysql_close();
?>

# curl http://192.168.1.245:8001/connmysql.php
succ

五、Nginx與PHP分離的情形

Nginx Web伺服器與PHP應用

伺服器可能位於不同的伺服器，則做如下調整：
        Nginx配置通過fastcgi反向代理時應指定PHP伺服器監聽的IP地址及埠號。
        PHP伺服器監聽器監聽地址應修改為對外提供服務的IP地址及埠號。
        可使用NFS將PHP應用伺服器目錄掛載的本地，配置為Nginx location 路徑。

如下示例：
        Nginx伺服器：192.168.1.245:8001
        PHP  伺服器：192.168.1.242

Nginx伺服器nginx.conf配置
   location / {
     #       root   html;
             root  /data;
         index  index.php index.html index.htm;

     location ~ \.php$ {
   #      root           html;
          root           /data;
         fastcgi_pass   192.168.1.242:9000;
         fastcgi_index  index.php;
         fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
         include        fastcgi_params;
     }

PHP伺服器php-fpm.conf配置
        # grep listen /usr/local/php/etc/php-fpm.conf|grep -v ";"
                listen = 192.168.1.242:9000  

    # mkdir -pv /data        ###存放php程式碼
        # echo "/data 192.168.1.0/24(rw)" >/etc/exports
        # /etc/init.d/rpcbind start
        # /etc/init.d/nfslock start
        # /etc/init.d/nfs start

Nginx伺服器mount NFS
        # mount -t nfs 192.168.1.242:/data /data        

驗證略