[PR][php-langspec][#69][master] - Lexical structure fixes

[email protected]
Newsgroups php.standards,php.standards
Message-ID <[email protected]> 
You can view the Pull Request on github:
https://github.com/php/php-langspec/pull/69

Pull Request Description:
The following major changes were made:
- Null & boolean literals removed since those are not literals but constants
- Added variable substitution part with detailed description & syntax
- Changed negative literals description to be less conversational and more normative
- Changed references to c-constant to a constant expression
lmpx.com only provides a reader for public news (NNTP) servers. It is not affiliated with the servers or forums shown here and is not responsible for the content of articles, which is written by their respective authors.