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	 <1261413231.13430.46.camel@guybrush>
Date: Mon, 21 Dec 2009 08:39:53 -0800
Message-ID: <c25f8d340912210839tbd95796ve1c74fbb5da93d62@mail.gmail.com>
To: =?UTF-8?Q?Johannes_Schl=C3=BCter?= <johannes@php.net>
Cc: Christian Grobmeier <grobmeier@gmail.com>, internals@lists.php.net
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Subject: Re: [PHP-DEV] How does the interpreter work
From: 0xcafefeed@gmail.com (mm w)

Pas mieux, and I am sure johannes did not find the need to express
himself and/or these mind  limitations on his blog :)

harf I am so bad I know.

-mmw

2009/12/21 Johannes Schl=C3=BCter <johannes@php.net>:
> Hi,
>
> On Mon, 2009-12-21 at 14:56 +0100, Christian Grobmeier wrote:
>> I would like to learn more about how the interpreter works, but I was
>> unable to find good documents on the web. Basically I am thinking on
>> something about allocation of variables, how does object creation work
>> and such stuff. Maybe something on the overall architecture of PHP
>> would be of interest too.
>>
>> In java world there is the JVM specification, I hoped there is
>> something for PHP too.
>
> Well there's one quite complete document about it available - the source
> code ;-) PHP isn't developed following standards but simply by
> implementing and extending it. PHP is defined by the implementation ...
>
> But: What exactly do you want to learn? Do you want to learn how to use
> it better or "academic reasons" or something else? - Depending on all
> that the focus of the learning might be quite different.
>
> As a starting point for this I recently created a small toy project: A
> minimal basic inspired language on top of the ZendVM, just 200 lines of
> C code which might give a few pointers to do further research. It's
> quite hackish ugly code but enough to compile and execute a script like
> this:
>
> 10 GOTO 40
> 20 PRINT "B"
> 30 END
> 40 PRINT "A"
> 50 GOTO 20
>
> This all will be compiled to Zend Opcodes which can be executed, cached
> with APC, dumped by vld, ...
>
> I hope I find the time to write the documentation around it, other than
> that this code is absolutely useless :-)
>
> http://github.com/johannes/pasic
>
> johannes
>
>
>
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