This guide will explain how to check WordPress core files, if these have been changed it can prevent a site working and can also point to a site being compromised with malware
TL;DR WordPress core files can be checked via cPanel > WordPress Toolkit > Check WordPress Integrity > Verify Checksums
Requirements
To complete this will require having a cPanel account with a WordPress site installed and the site has been added into WordPress Toolkit, to do this here is a guide for How To Scan & Add a Site into cPanel’s WordPress Toolkit
How to check WordPress core files using WordPress Toolkit
Step-by-Step Guide
1/ Search for WordPress Toolkit
In cPanel search for ‘WordPress Toolkit’ in the top right search bar and click on WordPress Toolkit from the search results
2/ Click Check WordPress Integrity
Inside the WordPress Toolkit go to the Dashboard tab and click on Check WordPress Integrity
3/ Verify Checksums
Click on Verify Checksums, this will compare the site files to the WordPress Core default files
4/ Checksum Complete
WordPress Toolkit will confirm if the WordPress core files are the same as the default WordPress version
Video Tutorial
Summary
This check will confirm if any changes have been made to the WordPress Core files, if this reports changes have been made, the WordPress core files can be re-installed using the following guide: How To Reinstall WordPress Core Files using WordPress Toolkit
