The reference to EXPERIMENTAL was related to ALL versions of PHP prior to PHP7
It is only in PHP7 that PHP was fully ported to 64bit.
That was the only experimental bit, and applied to all 64bit PHP installations on windows prior to PHP7 regardless of where you got your PHP from, WAMPServer / XAMPP / Manual install / etc / etc.
That still applies if you are going to use a version of PHP prior to PHP7.0.0
PHP7.0.7 is now available as an ADDON to WAMPServer 3 installations
---------------------------------------------------------------------------------------------
(Windows 10 Pro 64bit) (Wampserver 3.3.4 64bit) Aestan Tray Menu 3.2.5.4
<Apache versions MULTIPE> <PHP versions MULTIPLE> <MySQL Versions MULTIPLE>
<MariaDB versions MULTIPLE> <phpMyAdmin versions MULTIPLE> <MySQL Workbench 8.0.23>Read The Manuals Apache --
MySQL --
PHP --
phpMyAdminGet your Apache/MySQL/mariaDB/PHP ADDONs here from the
WAMPServer alternate Repo-X-X-X-
Backup your databases regularly Here is How dont regret it later! Yes even when developing -X-X-X-