Does Hhvm not support php?

The HHVM engine built by Facebook released the official version 4.0 today. Version 4.0, originally scheduled to be released on January 28, 2019, is finally here after being delayed for two weeks.

HHVM is a PHP virtual machine built by Facebook that dramatically increases speed by dynamically translating PHP code into native machine code. (Recommended learning: PHP video tutorial)

HHVM supports PHP and PHP dialect Hack language. ButAccording to previous reports from Open Source China, the development team announced that HHVM v3.30 will be the last version to support PHP and will stop supporting PHP starting from 4.0.

Now that version 4.0 has been released, we see from the release announcement that HHVM 4.0 indeed no longer supports PHP.

In addition, This version adds support for .hack files, non-experimental support for HSL regular expressions, and removes several PHP-related Behaviors, such as:

Delete behaviors that exist in PHP arrays, but not Hack Arrays or Hack Collections

Delete functions that require checking or changing the caller (or method of calling the function ), such as compact(), extract(), get_declared_variables(), func_get_args()

Deprecation Reference Manual

The official also stated that it plans to delete the reference to

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