If you're using NGINX as your webserver, use the rewrite rules below instead of .htaccess.

These will need adding to /etc/nginx/sites-available/default or wherever this file is located on your nginx install.

#######################################################################
# START NGINX RULES
#######################################################################
    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    location ~ \.php$ {
        if (!-e $request_filename) { rewrite ^/(.*) /index.php?_page_url=$1 last; }
    }

    location / {
		if (!-e $request_filename) {
			rewrite ^/(.*) /index.php?_page_url=$1 last;
		}
    }

    location /files/ {
        internal;
    }

    # these locations would be hidden by .htaccess normally
    location /core/logs/ {
        deny all;
    }
#######################################################################
# END NGINX RULES
#######################################################################


#######################################################################
# Full /etc/nginx/sites-available/default file example below:
#######################################################################
server {
    listen       80;
    server_name  localhost; # change this for your server
    root /usr/share/nginx/html;
    index index.php;
    client_max_body_size 5G;

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    location ~ \.php$ {
        if (!-e $request_filename) { rewrite ^/(.*) /index.php?_page_url=$1 last; }
        fastcgi_pass   127.0.0.1:9000;
        fastcgi_index  index.php;
        fastcgi_param  SCRIPT_FILENAME   $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }

    location / {
		if (!-e $request_filename) {
			rewrite ^/(.*) /index.php?_page_url=$1 last;
		}
    }

    location /files/ {
        internal;
    }

    # these locations would be hidden by .htaccess normally
    location /core/logs/ {
        deny all;
    }

    location ~* "/\.(htaccess|htpasswd)$" {
        deny    all;
        return  404;
    }
}
