PHP PlusCode Local: Get the location information from PlusCode

Class PlusCodeLocal

This static class extends the static class PlusCode, found here:
https://www.phpclasses.org/package/11016

The class provides a single method, get() which takes as input a 
full Open Location Code and returns a string with a localized code.

The philosophy of the Google PlusCode address is that it "looks like 
a regular address, but with a short code where the street name and 
number would be."  This class tries to provide the "regular address"
part in a manner that looks similar to the PlusCode that Google might
produce.  It gives names of the nearby locations such that a full 
Open Location Code of "48Q39JW9+G9" would be returned in the form of
a local code like "9JW9+G9 Buenos Aires Argentina."  

This class has a dependency on web services from GeoNames.org.  To 
use the web services, you _must_ get your own API key from GeoNames.
Register and login to GeoNames here:
https://www.geonames.org/login

When you have your API key, insert it into the public static $apikey 
variable at the top of this class file.

The GeoNames API fails sometimes.  When this happens the Class
returns the original input Open Location Code.  The full OLC may
still be usable in many applications.  A PHP Notice will be issued 
saying something like this:
    "ERROR: canceling statement due to statement timeout"

The demonstration script for this class will call the GeoNames API 
repeatedly and in practice that might not be a good idea.  You may
want to consider downloading and hosting your own version of their
database.

Documentation References:
   https://plus.codes/
   https://www.geonames.org/about.html
   https://www.geonames.org/export/ws-overview.html
   https://www.geonames.org/export/web-services.html#findNearby
   https://www.geonames.org/export/codes.html