March Madness/Day 5

I run a hobby website which is tourist-related and involves specific locations on a map, many of which are in London. For the Day 5 program I've written a function to convert British National Grid Reference values into page number and grid reference for the London A-Z (a very popular road atlas).

The program comes with its own (very basic) demo, all you need is a webserver running PHP.

View the code