Files: wp-admin/includes/class-wp-site-health.php

Run the SQL version checks.

Test if `wp_version_check` is blocked.

Tests for WordPress version and outputs it.

Populate our list of cron events and store them to a class-wide variable.

Check if any scheduled tasks have been missed.

Check if any scheduled tasks are late.

Run a loopback test on our site.

Create a weekly cron event, if one does not already exist.

Run our scheduled event to check and update the latest site health status for the website.

Test if themes are outdated, or unnecessary.

Return a set of tests that belong to the site status page.

Test if the supplied PHP version is supported.

Add a class to the body HTML tag.

Check if the passed extension or function are available.

Initiate the WP_Cron schedule test cases.