Map subdomains to URLs in nginx with WordPress.

gistfile1.txt

server {
    listen      80;
    listen      443 ssl;
    server_name ~^(?<user>[a-zA-Z0-9-]+)\.example\.com$;

    location / {
        resolver            8.8.8.8;
        rewrite             ^([^.]*[^/])$ $1/ permanent;
        proxy_pass_header   Set-Cookie;
        proxy_pass          $scheme://example.com/user/$user$request_uri;
    }
}

server {
    listen          80;
    listen          443 ssl;
    server_name     www.example.com;
    return          301 $scheme://example.com$request_uri;
}

server {
    listen      80;
    server_name example.com;

    access_log  /var/www/example.com/logs/access.log;
    error_log   /var/www/example.com/logs/error.log;

    root        /var/www/example.com/public;
    index       index.php;

    location / {
        try_files $uri $uri/ @wordpress /index.php?q=$request_uri;
    }

    location @wordpress {
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include /etc/nginx/fastcgi_params;
        fastcgi_param SCRIPT_NAME /index.php;
    }

    # Pass the PHP scripts to FastCGI server listening on UNIX sockets.
    #
    location ~ \.php$ {
        try_files $uri @wordpress;
        fastcgi_pass   unix:/var/run/php5-fpm.sock;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }
}

server {
    listen                      443 ssl;
    ssl                         on;
    keepalive_timeout           70;
    server_name                 example.com;
    ssl_certificate             ssl/example.com.chained.crt;
    ssl_certificate_key         ssl/example.key;
    ssl_protocols               SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers                 HIGH:!aNULL:!MD5;
    ssl_session_cache           shared:SSL:10m;
    ssl_session_timeout         10m;
    ssl_prefer_server_ciphers   on;

    root        /var/www/example.com/public;
    index       index.php;

    location / {
        try_files $uri $uri/ @wordpress /index.php?q=$request_uri;
    }

    location @wordpress {
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include /etc/nginx/fastcgi_params;
        fastcgi_param SCRIPT_NAME /index.php;
    }

    # Pass the PHP scripts to FastCGI server listening on UNIX sockets.
    #
    location ~ \.php$ {
        try_files $uri @wordpress;
        fastcgi_pass   unix:/var/run/php5-fpm.sock;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }
}