How to Edit PHP in WordPress?

WordPress relies heavily on PHP, a server-side scripting language, to generate content and handle various functionalities.

While WordPress provides a user friendly interface for managing your website, there may come a time when you need to customize your site further.

However, editing PHP files requires caution, as any mistake can lead to website malfunctions.

In this guide, we will walk you through the process of editing PHP in WordPress safely, ensuring that your website remains intact and error-free.

What are PHP Files in WordPress?

PHP files serve as the backbone of a WordPress website, enabling it to function dynamically. They work behind the scenes to generate content, process forms, and execute various functions.

The most commonly edited PHP files are found within the theme directory, such as “functions.php” (for theme functions), “header.php” (for the header section), and “footer.php” (for the footer section).

Step-by-Step: How to Edit PHP in WordPress?

Step 1. Take Website Backup before Editing PHP

Before starting PHP editing, it’s crucial to create a complete backup of your WordPress site. This step acts as an insurance policy against any errors or unforeseen issues that might arise during the process.

You can use reliable backup plugins or your web hosting control panel to perform this backup.

Step 2. Access Your WordPress Files

To access your WordPress files, you have several options. Using FTP, File Manager or Theme Editor, or Plugin Editor in WordPress Dashboard.

You can choose one of the methods which suit you best. In terms of simplicity, using a hosting file manager is the best method to access your WordPress website files.

Step 3. Locate the PHP File to Edit

Once you have access to your WordPress files, navigate to the theme directory where the PHP files are located.

Commonly edited PHP files can be found within the “wp-content/themes/your-theme-name” folder. Identify the specific PHP file you want to edit based on the changes you wish to make.

Step 4. Making Safe Edits to PHP Files

Now select the file which you want to edit and open it in the built-in code editor provided by hosting. You can also download the file and edit it in your PC code editor like Visual Studio Code and later upload the modified file to the WordPress files directory.

Before making any changes, thoroughly review the PHP code to understand its structure and function. Always make a habit of adding comments to your code to explain the changes you are making.

Properly indent the code for readability, as this practice helps identify unclosed code blocks or tags more easily.

Step 5. Test Your Website After Editing

After making your edits, save the PHP file and upload it back to your server using FTP or File Manager. Once the file is updated, it’s crucial to test your website thoroughly. Check all the areas you’ve modified to ensure that everything is functioning as expected.

Troubleshooting and Debugging

In case you encounter any issues or errors after editing PHP files, don’t panic. Revert the changes you made and carefully examine your PHP code for errors or typos. Enable WordPress debugging to help pinpoint the problem and troubleshoot accordingly.

Security Precautions

When editing PHP files, exercise caution to avoid compromising the security of your website. Avoid modifying core WordPress files, as doing so could lead to security vulnerabilities or issues during future updates. Instead, use child themes to preserve your changes and maintain a separation between the theme’s core files and your customizations.


We have learned the essential steps to safely edit PHP files in WordPress. Now you can confidently customize your website to get desired features.

Remember always to create backups before making any changes and follow best practices to avoid potential pitfalls.

By mastering PHP editing, you gain greater control over your WordPress site, making it truly your own and a unique reflection of your brand or vision.