Your theme’s functions.php file is where all the theme-specific features of your website live - like custom menu locations, widget areas, custom header and footer content and functionality, post excerpt length, and more. You should almost never modify the code in WordPress core’s functions.php file. The functions.php file in WordPress core contains important code that’s required for WordPress to function. If you’re using a child theme, you should also have a functions.php in your child theme folder. There are actually at least two functions.php files in every WordPress website - one included with WordPress core and one included with your theme. In WordPress, the functions.php file is where vital code lives that determines the way your site works. Can I add JavaScript to my functions.php file?.How do I restore functions.php from a backup if I don’t have access to my WordPress dashboard?.Do I need to create a child theme to edit functions.php?.What code can I add to functions.php in WordPress?.How to protect functions.php from security exploits.Using a plugin to add functions to your WordPress site.Editing functions.php directly in cPanel.Editing functions.php with a text editor.Editing functions.php in your WordPress Theme File Editor.When should I edit functions.php in WordPress?.Accessing functions.php in your WordPress Admin Interface.Where is the functions.php file located?.You can start at the beginning and read through or jump to a specific section using the table of contents below: We’ll even include a few useful code snippets to try out. You’ll learn what functions.php does and how to find and edit it.

In this article, we’ll cover everything you need to know about WordPress functions.php files. Knowing where these files live, what their purpose is, and how and when to modify them will help you when troubleshooting issues and give you more control over your site’s functionality. There are actually three possible functions.php files that you might use on your WordPress website, and each plays a different role. If you’re just getting started with WordPress development, one of the most important files you should familiarize yourself with is the functions.php file.

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