Send an email to the old site admin email address when the site admin email address changes.

Temporarily suspend cache additions.

Suspend cache invalidation.

Retrieves the timezone of the site as a DateTimeZone object.

Gives a nicely-formatted list of timezone strings.

gmt_offset modification for smart timezone handling.

Retrieves the timezone of the site as a string.

Get a filename that is sanitized and unique for the given directory.

Gets unique ID.

Prints the default annotation for the web host altering the “Update PHP” page URL.