This PHP Web Application demonstrates the use of the JavaScript Toolkit from the EnableX Platform to develop a multiparty video chat application. You might also require an App Server of your choice to support this App.
Why do you think that https://github.com/EnableX/One-to-One-Video-Calling-Open-Source-React-Native-Application is a good alternative to Group-Video-Call-Conferencing-Sample-Application-in-PHP