php 与 nginx 的处理方式及nginx与php-fpm通信的两种方式

php-fpm
docker pull PHP:2.4-alpine
nginx.conf
fastcgi_pass 127.0.0.1:9000;

location /php
    {     
      proxy_set_header Host $host:$server_port;
      proxy_pass http://138.38.38.111:80/;
    }

php-fpm
listen = /tmp/php-fpm.sock
nginx.conf
fastcgi_pass unix:/tmp/php-fpm.sock;

location ~ \.php$ {
  include fastcgi_params;
  fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;;
  fastcgi_pass 127.0.0.1:9000;
  fastcgi_index index.php;
}

location ~ \.php$ {
  include fastcgi_params;
  fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;;
  fastcgi_pass unix:/var/run/php5-fpm.sock;
  fastcgi_index index.php;
}

; The address on which to accept FastCGI requests.
; Valid syntaxes are:
;  'ip.add.re.ss:port'  - to listen on a TCP socket to a specific IPv4 address on
;              a specific port;
;  '[ip:6:addr:ess]:port' - to listen on a TCP socket to a specific IPv6 address on
;              a specific port;
;  'port'         - to listen on a TCP socket to all IPv4 addresses on a
;              specific port;
;  '[::]:port'      - to listen on a TCP socket to all addresses
;              (IPv6 and IPv4-mapped) on a specific port;
;  '/path/to/unix/socket' - to listen on a unix socket.
; Note: This value is mandatory.
listen = 127.0.0.1:9000
listen = /var/run/php-fpm.sock

; Set permissions for unix socket, if one is used. In Linux, read/write
; permissions must be set in order to allow connections from a web server. Many
; BSD-derived systems allow connections regardless of permissions.
; Default Values: user and group are set as the running user
;         mode is set to 0660
listen.owner = www
listen.group = www 
listen.mode = 0660