PHP Docs are pretty good as already mentioned. I personally love the Documentation for Kirby CMS: https://getkirby.com/docs/guide https://getkirby.com/docs/gu

PHP Docs are pretty good as already mentioned. I personally love the Documentation for Kirby CMS: https://getkirby.com/docs/guide https://getkirby.com/docs/guide https://getkirby.com/docs/reference https://getkirby.com/docs/reference https://getkirby.com/docs/cookbook https://getkirby.com/docs/cookbook