Evaluating and Implementing Custom WordPress Code

Last week I looked at what you needed to know to understand how to customize WordPress. WordPress is awesome because with very little work, you can have a totally functional and great looking site. But this isn’t Wix, the real power of WordPress is that you have the power to customize it any way you need. Of course that isn’t always easy. basics of what languages WordPress is written in and how to use WordPress hooks and JavaScript events to customize your site. In this article, I want to help you choose the best place to put code and how to test to make sure it’s the right code. I’ll cover some ways to ensure the code is secure and test that it really works before going live.
Where Do I Put Custom Code to WordPress?
In my article last week, I gave you an what kind of code does what on a WordPress site. As WordPress site developers we often find ourselves looking to code to solve problems.
We might want to change the way something looks. That means we need CSS code, but also we need to add that CSS code somewhere, which means we need to add PHP code to load a CSS file or add the CSS to our page.
We might want to add additional information to the checkout form
Source: https://managewp.org/articles/13855/evaluating-and-implementing-custom-wordpress-code

source https://williechiu40.wordpress.com/2016/11/17/evaluating-and-implementing-custom-wordpress-code/