Stupid Simple Matchmaking

PHP Library used for simple equal distance matchmaking, great for Live Service Games!

Installation

Simply run composer require mathmark/stupid-simple-matchmaking in any PHP project setup with composer!

StupidSimple\Game\Matchmaking

This is where all the magic happens! All our matchmaking functionality is called here.

Constructor

• private int $clientIpAddress This is our base Client Address, this is what helps us find a server for a user

• private ?array $availableGameServers; This is an array populated with the metadata for our available GameServers

The structure should look like this

[
  {
    "name": "US-PROD-1",
    "ipAddress": "192.168.1.10"
  },
  {
    "name": "CHI-PROD-1",
    "ipAddress": "192.168.1.20"
  },
]

Functions

• getRandomServer() : array This returns an ipAddress & name for a random GameServer available
• getClosestServer() : array This is where we utilise our $clientIpAddress, this will return an ipAddress & name for a GameServer thats closest to our User/Client

Note: If a name isn't provided for the server, one will be generated. However this is not recommended as it isn't great for organisation and is not consistent.

How this works & what is tracked?

Our service uses a trusted web API (ip-api) to get metadata for our client and server (such as Geolocation & CountryCode), it then uses this information to MatchMake our user.

Example Code

use StupidSimple\Game\Matchmaking;

$availableGameServers = [
    [
        "name" => "US-PROD-1",
        "ipAddress" => "192.168.1.10"
    ],
    [
        "name" => "CHI-PROD-1",
        "ipAddress" => "192.168.1.20"
    ]
];

$clientIp = $_SERVER['REMOTE_ADDR'];

$matchmaking = new Matchmaking($clientIp, $servers);

$closestServer = $matchmaking->getClosestServer();
exit(json_encode($closestServer));

Example Response

getClosestServer() && getRandomServer() both respectively return this array

{
    "serverName" : "US-PROD-1",
    "serverAddress" : "192.168.1.10"
}  

getClosestServer() also returns the distance in the array, getRandomServer() does not.

For example:

{
    "serverName" : "US-PROD-1",
    "serverAddress" : "192.168.1.10",
    "distance" : "0.00" # measured in miles
}  

See StupidSimple\Math\DistanceCalulator for more information on how the algorithm works!

Citations

https://en.wikipedia.org/wiki/Haversine_formula