Coding standard

Please consider introducing a coding standard.

e.g.
```
composer require --dev wp-coding-standards/wpcs
vendor/bin/phpcbf --standard=WordPress-Core cli/ inc/ lib/ src/ autoload.php litespeed-cache.php
```

Or a better one: `--standard=PSR12` but this does not include WordPress security checks.

Start by reviewing the repository's Composer setup and the cli/, inc/, lib/, src/, autoload.php, and litespeed-cache.php paths named in the issue. Compare the WordPress-Core and PSR12 options, including WordPress security checks, and define completion as a selected coding standard running successfully across those paths.

Written by the indexing model from the issue text.