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

Enqueues the site health scripts.

Check if the HTTP API can handle SSL/TLS requests.

Run a Site Health test directly.

Test if scheduled events run as intended.

Run the SQL version checks.

Test if `wp_version_check` is blocked.

Tests for WordPress version and outputs it.

Test if plugins are outdated, or unnecessary.

Test if themes are outdated, or unnecessary.

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.

Check for potential issues with plugin and theme auto-updates.

Run a loopback test on our site.

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