Sets up this cookie object.
Runs the shutdown handler.
Detects the error causing the crash if it should be handled.
Determines whether we are dealing with an error that WordPress should handle in order to protect the admin backend against WSODs.
Displays the PHP error template and sends the HTTP status code, typically 500.
Displays the default PHP error template.
Initiate the WP_Cron schedule test cases.
Populate our list of cron events and store them to a class-wide variable.
Check if any scheduled tasks have been missed.
Run a loopback test on our site.
Test if debug information is enabled.
Test if your site is serving content over HTTPS.
Check if the HTTP API can handle SSL/TLS requests.
Test if scheduled events run as intended.
Test if WordPress can run automated background updates.