PHP 8.0 support on Pages build environment

Currently, the build env of Pages only supports PHP 7.3 and 7.4.
The latest version, 8.0, is however not supported.

How does Cloudflare Pages Support PHP ? Does it actually supports ? Core PHP / any Frameworks ?

In the build environment, not at runtime.

PHP 8 will be supported in the next release of the build system, which is coming Soon :tm: