CakePHP 3 and WordPress On Nginx Server - This is a simple Nginx configuration file. On the server, it will work in the WordPress sub-directory and CakePHP3 in the root directory. 

nginx.conf

server {

	listen 80;
	root /var/www/httdocs;

	index index.php index.html index.htm index.nginx-debian.html;


	server_name <server_name>;

	add_header X-Frame-Options "SAMEORIGIN" always;
	add_header X-XSS-Protection "1; mode=block" always;
	add_header X-Content-Type-Options "nosniff" always;
	add_header Referrer-Policy "no-referrer-when-downgrade" always;
	add_header Content-Security-Policy "default-src * data: 'unsafe-eval' 'unsafe-inline'" always;

	gzip on;
	gzip_vary on;
	gzip_proxied any;
	gzip_comp_level 6;
	gzip_types text/plain text/css text/xml application/json application/javascript application/xml+rss application/atom+xml image/svg+xml;


	location /blog/ {

		if (!-e $request_filename) {

			rewrite ^.*$ /blog/index.php last;
		}
	}

	location / {

		try_files /webroot/$uri /webroot/$uri/ /webroot/index.php?$args;


	}

	location ~ \.php$ {

		include fastcgi_params;
		fastcgi_pass unix:/run/php/php7.0-fpm.sock;
		fastcgi_index index.php;
		fastcgi_intercept_errors on;
		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
	}

	location ~ /\.ht {

		deny all;
	}


}