Replace WordPress Core Files – Advanced Troubleshooting

Replacing WordPress core files can resolve a wide range of site issues, including compromised site security, inaccessible wp-admin, and the dreaded White Screen of Death (WSOD). Although it may seem complex at first, understanding WordPress file structure simplifies this process. Here’s how to replace core files without affecting your site’s content.

Step 1: Review WordPress File Structure

Your WordPress file system includes three primary components:

1. Core Files: These are essential for WordPress functionality.
2. wp-content Folder: Contains all user content, including themes, plugins, and media.
3. wp-config.php File: Manages database connections.

Pro Tip: Disable all plugins before replacing core files to avoid conflicts.

Step 2: Backup and Delete Old Core Files

1. Keep the wp-content folder and wp-config.php file.
2. Delete all other core files. This action prepares your site for a fresh installation of WordPress core files without affecting your customizations or content.

Step 3: Download and Install the Latest WordPress Version

1. Download the latest version of WordPress from WordPress.org.
2. Upload the downloaded ZIP file to your web root and extract it.
3. Move all core files, except the wp-content folder, into your web root.
4. Delete the extracted WordPress folder after transferring files.

Step 4: Reset Permalinks and Verify Site Functionality

Log into the WordPress admin panel, navigate to Settings > Permalinks, and save the settings to regenerate the .htaccess file. This step ensures your URLs work correctly.

Pro Tip: If your site was compromised, replace wp-config.php by copying database connection details into a fresh wp-config-sample.php file, renaming it to wp-config.php.

Final Steps

Once complete, enable your plugins and check for broken links or other issues. This process should leave you with a clean, fully functional WordPress site.

For more troubleshooting tips, visit our Advanced WordPress Troubleshooting Guide.