The file `template.php` is the one you'll probably want to work with. You'll want to point your browser to this file. It contains some initializations where the most important one is the variable `$pairingfile`. You'll want to set this to existing pairing file.
The other variable (`$pairingfileformat`) is a variable that defines the format of the above pairing file. For now only `Pairtwo-6`, `Pairtwo-5` and `Swar-4` are available. In the future more formats will become available.
Below the comments you'll find some example code. The example codes gives the pairings and rankings of the currently used pairing file. If you need any modifications like adding your own template or you want to just write it to a file: go ahead it's all yours.
If you want to upgrade the library to a new version of it you just need to remove the vendor direcotry and upload the updated one.
I definitely say to remove it because simply overwriting might cause problems because residual files.
You might want to re-upload the file composer.json as well as this file might have been changed as well. However, it probably won't change a lot and can be safely ignored if you don't need other dependencies.
If you started to ask yourself this question, you'll probably know what composer and dependency management is? Therefore this section will become a little more advanced than the ones above.
It's actually very simple, just add them like you normally would do.
$ composer require phpoffice/phpspreadsheet
If you already have a project with other dependencies you'll only want to copy the `boilerplate.php` file and run.
If you want to update the libary while having other dependencies, you'll definitely don't want to remove vendor directory or composer.json file. The vendor folder contains these other dependencies and the composer.json contains the definitions of these dependencies. To update the library you only need to launch the update command.
