Per the timetable at https://wiki.php.net/todo/php80 , the PHP-8.0 branch will be cut in FOUR WEEKS on Aug 4th just prior to the release of php-8.0.0beta1 on Aug 6th. Please note that August 4th marks FEATURE FREEZE for 8.0.
All RFCs currently in discussion targeting 8.0 should plan to begin voting in the next 2 weeks in order to have sufficient time to complete prior to the August 4th deadline and have their initial implementations merged before the branch is cut. All RFCs not yet in discussion... Well, tick tock, right? -Sara