foo.conf

fastcgi_cache_path /home/foo/site.com/cache levels=1:2 keys_zone=WORDPRESS:100m inactive=60m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";

server {
    # also use www here
    server_name site.com;
    
    access_log /home/foo/site.com/logs/access.log;
    error_log /home/foo/site.com/logs/error.log;

    root /home/foo/site.com/public/;
    index index.php;

    # Cache
    set $skip_cache 0; 

    # POST requests and urls with a query string should always go to PHP
    if ($request_method = POST) {
        set $skip_cache 1;
    }   
    if ($query_string != "") {
       set $skip_cache 1;
    }   
    
    # Don’t cache uris containing the following segments
    if ($request_uri ~* "/wp-admin/|/xmlrpc.php|wp-.*.php|/feed/|index.php|sitemap(_index)?.xml") {
        set $skip_cache 1;
    }   

    # Don’t use the cache for logged in users or recent commenters
    if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_no_cache|wordpress_logged_in") {
        set $skip_cache 1;
    }
    ## End Cache      
        
    # Rewrite multisite '.../wp-.*' and '.../*.php'.
    if (!-e $request_filename) { 
        rewrite /wp-admin$ $scheme://$host$uri/ permanent;
        rewrite ^(/[^/]+)?(/wp-.*) $2 last;
        rewrite ^(/[^/]+)?(/.*\.php) $2 last;             
    } 
    
    location / {
        try_files $uri wp$uri/ /wp/index.php?$args;
        index index.php;
    }
       
    rewrite ^/(wp-.*.php)$ /wp/$1 last;
    rewrite ^/(wp-(content|admin|includes).*) /wp/$1 last;
    location ~* ^.+\.(jpe?g|gif|js|css|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mp3)$ {
        expires 30d;
        rewrite ^/(wp-(content|admin|includes).*) /wp/$1 break;
    }

    location ~ \.php$ {          
        try_files $uri =404;
        #try_files $uri wp$uri/ /wp/index.php?$args;

        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
                      
        # Caching (FastCGI) configuration
        fastcgi_cache_bypass $skip_cache;
        fastcgi_no_cache $skip_cache;
        fastcgi_cache WORDPRESS;
        fastcgi_cache_valid 60m;
    }
   
    # Caching (FastCGI) configuration
    location ~ /purge(/.*) {
        fastcgi_cache_purge WORDPRESS "$scheme$request_method$host$1";
    }

}