Method: Tests available disk space for updates.

Method: Tests if plugin and theme temporary backup directories are writable or can be created.

Method: Returns a list of available persistent object cache services.

Method: Determines whether to suggest using a persistent object cache.

Method: Returns a list of headers and its verification callback to verify if page cache is enabled or not.

Method: Checks if site has page cache enabled or not.

Method: Gets page cache details.

Method: Gets the threshold below which a response time is considered good.

Method: Tests if a full page cache is available.

Method: Tests if the site uses persistent object cache and recommends to use it if not.

Method: Outputs the content of a tab in the Site Health screen.

Method: Checks if the current environment type is set to ‘development’ or ‘local’.

Method: Tests if the Authorization header has the expected values.

Method: Tests if plugin and theme auto-updates appear to be configured correctly.

Method: Tests if ‘file_uploads’ directive in PHP.ini is turned off.

Method: Checks for potential issues with plugin and theme auto-updates.

Method: Tests if there’s an active PHP session that can affect loopback requests.

Method: Creates a weekly cron event, if one does not already exist.

Method: Runs the scheduled event to check and update the latest site health status for the website.

Method: Tests if the PHP default timezone is set to UTC.

Method: Returns an instance of the WP_Site_Health class, or create one if none exist yet.

Method: Runs a Site Health test directly.

Method: Checks if any scheduled tasks are late.