In this link: [
forum.wampserver.com], it says <<Nota 16-1 : Apache and PHP in 64-bit versions are considered experimental and are reserved for Geeks and especially not for beginners, especially since they bring absolutely nothing more to the environment than the 32bit versions. And in fact you may have trouble getting some of the less mainstream extensions compiled for the 64bit Apache and/or PHP.>> Date: August 17, 2015 10:49PM.
But I read later to the versión 3, php will be working in 64-bit version not experimental.
[
forum.wampserver.com]
► Las compilaciones anteriores a php 7.0 fueron experimentales. A partir de la versión 3.0.0 php está compilado completamente a 64 bits y ya dejaron de ser experimentales.
I don't think the problem is happening for 64 bit.