A template included in WordPress themes is functions.php, also known as the theme functions file. It functions as a WordPress plugin that is activated automatically with your current theme. The functions.php file on a WordPress site uses PHP code to add or change default features.

A WordPress theme, for example, might add a line of code to the theme’s functions.php file to add a new widget area to the footer or a custom welcome message to the WordPress dashboard. The options are limitless!

If you install and activate a theme on your WordPress site, the functions.php file is automatically added.

By editing the functions.php file with custom codes, you could also upload post types, taxonomies, shortcodes, and several other features to your site.

Where Can I Find the Functions.php File?

In the theme folder, the functions.php file is located.

If you want to add a code snippet to your WordPress site, one option is to add it to the functions.php file.

However, this is not always the best approach. WordPress makes every effort to keep design and functionality separate as much as possible. This is why we have themes, which determine the design, and plugins, which determine the functionality.

It’s ideal if you can change your WordPress theme without affecting how your site functions, or if you can change your plugins without affecting how your site looks.

Many WordPress tutorials will tell you to add code snippets to your theme’s functions.php file, but this is almost always a bad idea.

Please exercise extreme caution if you decide to modify your functions.php file. Here are three reasons why changing your functions.php file is a bad idea:

When the theme is updated, any changes made to the functions file are lost.

If you change your WordPress theme, all of your changes will be lost.

Making coding errors in the functions file can result in you being locked out of your site.

Even a single missing semicolon can cause your entire website to crash, resulting in an error known as the “White Screen of Death.” If this happens to you.

Making a coding error in your functions.php file can also result in other WordPress errors.

If you have a child theme, you should only edit the functions.php file because the code snippets will only be used with the active child theme. For instance, you might want to include snippets for custom fonts, stylesheets, or a language translation file that is specific to that child theme.

Why Are Site-Specific Plugins Better? (Functions.php Alternative)

So, if you shouldn’t change functions.php, where should you put code snippets from online tutorials?

The solution is to create your own WordPress plugin.

This is often referred to as a “site-specific plugin” because it is unique to your site and will never be shared in the WordPress plugin directory.

Because your code snippets are stored separately from your theme’s functions.php file, using a site-specific plugin is the best solution. This means that they, like any other plugin, can be activated and deactivated. This ensures that your code will not be lost if you switch themes.

Unfortunately, WordPress does not come with a default site-specific plugin.

The good news is that you can create your own site-specific WordPress plugin or download one from the WordPress plugin directory.

For beginners, we recommend installing the Code Snippets plugin. The Code Snippets plugin is a much simpler solution that allows you to create, edit, and manage all of your custom code snippets in WordPress.

When you activate the Code Snippets plugin, a new menu item labeled Snippets will appear in your WordPress admin menu.

The Code Snippets plugin includes a user-friendly graphical interface, a full-featured code editor, and fields for the snippet name, description, and tags. You can also export your snippets for use on other websites.

We hope this article has taught you everything you need to know about WordPress’s functions.php file and how to add code snippets to your site!

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