nginx anti-leeching + dynamic and static separation + reverse proxy + cache + load balancing

Modify nginx/conf/nginx.conf. After modification, it is as follows:

user  www www;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

	    gzip  on;
	    gzip_min_length 1k;
	    gzip_buffers 16 64k;
	    gzip_http_version 1.1;
	    gzip_comp_level 9;
    	gzip_types text/plain application/x-javascript text/css application/xml;
	    gzip_vary on;
	upstream webservers{
		server 192.168.1.82;
		server 192.168.1.88;
	}
	proxy_cache_path /data/nginx/cache/webserver levels=1:2 keys_zone=webserver:20m max_size=1g;
	server{
        	listen       80;
        	server_name  song.com;
		index index.html idnex.htm;
		root /data0/htdocs/www;

#....................................................防盗链...............	

	 #location ~ .*\.(|jpg|gif|png)$ {
			#root /data0/htdocs/www/;               
	 		#valid_referers none  blocked *.demo.com demo.com 192.168.1.75;
        	        #if ($invalid_referer){
                        #rewrite ^/ http://www.765h.com/error.html;
                        # return 403;
                #}
	#}
#...................................................防盗链end....................
#......................................................模块缓存
	# location /download {
	#	root /data0/htdocs/www/;
  	#	accesskey             on;
 	 #       accesskey_hashmethod  md5;
  	#	accesskey_arg         "key";
  	#	accesskey_signature   "mypass$remote_addr";
	#}
#................................................................................
             #add_header X-Via $server_addr;
             #add_header X-Cache $upstream_cache_status;
#........................................................动静分离..................
        location ~ (\.php)$ {
                   proxy_pass http://webservers;

        }
#......................................................end 动静分离................
 #...................................................页面缓存
        #location / {
         #  root   /data0/htdocs/www;
          # index  index.html index.php  index.htm;
	   #proxy_pass      http://webservers;
         # proxy_set_header  X-Real-IP  $remote_addr;
          # proxy_cache webserver;
          #proxy_cache_valid 200 10m;
#.........................................................end 页面缓存
	#location /img/ {
 	   #root /data/img/;
   	   #valid_referers none blocked *.demo.com demo.com;
           #if ($invalid_referer) {
          #         rewrite  ^/  http://www.demo.com/images/error.gif;
         #          #return   403;
   	#	 }
	#}
        #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   /data0/htdocs/www;
        }

        # 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;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443;
    #    server_name  localhost;

    #    ssl                  on;
    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_timeout  5m;

    #    ssl_protocols  SSLv2 SSLv3 TLSv1;
    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers   on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    

}

The above introduces nginx anti-leeching + dynamic and static separation + reverse proxy + cache + load balancing, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.