They stopped supporting interoperability a while ago [0]. [0]: https://hhvm.com/blog/2018/09/12/end-of-php-support-future-of-hack.html https://hhvm.com/blog/20

They stopped supporting interoperability a while ago [0]. [0]: https://hhvm.com/blog/2018/09/12/end-of-php-support-future-of-hack.html https://hhvm.com/blog/2018/09/12/end-of-php-support-future-o...