I'm wanting to create my own WP theme (for personal use). I'm fairly acquainted with HTML and CSS, but only recently realised that WP themes require PHP, too.
1. How much PHP do I need to know? I was trying to learn some on Code Academy, but their PHP section is rubbish and keeps crashing - can anyone recommend any other PHP resources with a built in live preview for you to practice while you learn?
2. Can anyone recommend a text editor that lets you live preview PHP? I'm currently using Adobe's brackets, but it has its flaws in this section.
Thanks in advance!