Evaluate opcode directly

[oraoto]

Can we utilize zend_execute to evaluate opcode directly?

Some benefits:

1. Reduce code size for faster load time
2. Skip lexing and parsing for faster startup time

If possible, we can remove the lexer and parser entirely.

[bigwasp]

Have you seen https://github.com/symisc/PH7 may be this can give some Ideas. It is called PH7 but imho PHP5