If someone being a frontend developer (not fullstack) wants to start selling theme online then what standard should he follows. Also the developer has only basic knowledge of PHP and he's not core PHP developer. His skillsets are HTML5, CSS3, JavaScript, jQuery and so... Still he can google out things to achieve his goals for WP and implement.
He is looking for a standard and valid guideline to develop multi-purpose theme considering future updates too. Means code written once shouldn't be changed per the future updates by WP.
Thanks in advance :)
I can recommend you this course on Udemy, it’s actually not expensive and you will get what you want : udemy.com/bootstrap-to-wordpress
Also this one if its not enough : udemy.com/photoshop-psd-to-wordpress-theme-develo…
read the documentation they explain it quite simple :) he doesn't have to be a good programmer to use / understand wordpress. it's a rather messy codebase with a lot of hacks and workarounds inside :) but just writing templates shouldn't be that hard he will very quickly get the hang of it :)
Sky
Coder
WordPress theme is developed with three things.
This is the most simple skeleton you have to remember for developing theme. After this you can head over to the WordPress documentation .
Apart from that you can also follow the third party theme frameworks for child theme with genesis framework . You will find the information for development of simple themes. More complex features like theme dashboard and plugins also have specific documentation.
Start from here and I am sure you'd be able to hack a theme or two in a weekend.