Here’s a list of a couple of very helpful resources for those who are starting to learn how to web develop. Also helpful for those who are advanced web developers! All of these are beneficial resources of you are stuck on a function or need a little help with web coding.
WordPress Codex – An online manual about everything WordPress from installation to plug-ins to troubleshooting.
WordPress Starter Theme – A basic starter WordPress theme meant for creating custom themes.
A Look Into the WordPress Hierarchy – How templates fit together on a custom WordPress site.
The PHP Manual – Hypertext Preprocessor Manual. General Purpose scripting language for web development.