PHP语言规范？
我知道Java（JLS）有一个官方文档，我想知道PHP语言是否也是如此。我在PHP手册上找到了“语言参考”部分，但它看起来没有JLS那么详细。
问题是我对 PHP 有很好的实践知识，但我对幕后真正发生的事情一无所知。
如果没有官方文档，您能给我推荐一些好书吗？
I know there is an official document for Java (JLS), I'd like to know if it's also the case of PHP language. I found the "Language Reference" section on the PHP manual, but it doesn't look as detailed as the JLS.
The thing is I have a good practical knowledge of PHP but I'm miserably clueless about what really happens under the hood.
If there isn't any official document, could you recommend me some good books to read?
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根据我在 Wikipedia 上读到的内容，PHP 和 Perl5 的共同点是它们都是完全通过单一实现定义的“语言”。语言正是口译员所做的一切。它们都不像 C、C++、Java 或 ECMAScript，它们都是具有许多不同实现的标准化语言。 （显然 Perl6 会有所不同，并且实际上有一个规范。不知道 PHP 有一天也会迈出这一步。）
From what I read on Wikipedia, both PHP and Perl5 have in common that they are "languages" which are entirely defined through one single implementation. The language is precisely whatever the interpreter does. Neither are like C or C++ or Java or ECMAScript, which are standardised languages with many different implementations. (Apparently Perl6 will be different and actually have a specification. No idea of PHP will also one day make this step.)
在这篇文章中，HHVM 社区宣布了 PHP 规范：http:// hhvm.com/blog/5723/announcing-a-specation-for-php
它现在位于以下 Github 存储库中：https://github.com/php/php-langspec
In this post, the HHVM Community announced a specification for PHP: http://hhvm.com/blog/5723/announcing-a-specification-for-php
It's now located in the following Github repo: https://github.com/php/php-langspec
对于正式的兴趣，可以在 www.phpsemantics.org 上获取 PHP 的详细（可执行）语义，并将于明天在瑞典举行的 ECOOP 2014 会议上发布。
For the formally inclined, a detailed (executable) semantics of PHP is available at www.phpsemantics.org and will be presented tomorrow at the ECOOP 2014 conference in Sweden.
从这个（日期）博客文章看来，PHP没有像这样的规范有一个用于 Java 的。
From this (dated) weblog post it appears that there is no specification for PHP like there is one for Java.
PHP 和 Java 是用于不同目的的不同语言，当然文档不遵循相同的标准。我认为
php.net是找到您想要的任何内容的最佳场所，也有好书，这完全取决于您的需求。Java 也有很棒的书籍，当然还有Java 规范。
PHP 没有规范，但有一份技术手册和大量示例。您还需要什么？也许是一本特定的书，尝试寻找Wiley Publishing，他们印刷有关 PHP 和其他语言的书籍。
PHP and Java are different languages for different purposes, of course the documentation do not follow the same standard. I think
php.netis the best place to find whatever you want, also have good books, it all depends what about your needs.Java also has great books, and of course the Java Specification.
PHP does not have an specification, but have a tech manual of it and plenty of examples. What more do you need? Perhaps an specific book, try to look for Wiley Publishing they print books about PHP and other languages.
PHP 的初始草案规范该语言现已宣布。规范简介如下：
另请参阅最新版本的草案< /a>.
An initial draft specification for the PHP language has now been announced. The introduction of the specification reads as follows:
See also the latest version of the draft.
不久前，内部邮件列表上有一个关于该主题的讨论。
您可以在那里检查状态。
起始帖子：http://marc.info/?l=php-内部&m=129379585417113&w=2
以及一个希望有帮助的后续描述一些语法：
http ://marc.info/?l=php-internals&m=129387252319019&w=2
统计数据记录了此事：
http://marc.info/?l=php-internals&m=129383062812273&w=2
There was a discussion about that topic on the internals mailing list not too long ago.
You can check the status there.
Starting Post: http://marc.info/?l=php-internals&m=129379585417113&w=2
and one hopefully helpfull follow up describing some grammar:
http://marc.info/?l=php-internals&m=129387252319019&w=2
And Stats take in the matter:
http://marc.info/?l=php-internals&m=129383062812273&w=2