Access to syntax tree? View as Markdown

Is there any way to access the parse tree of a PHP file from within PHP?

will this work for you?
http://docs.php.net/manual/en/tokenizer.examples.php

I'm trying to write a code-checking utility to find namespace-related
problems in code and alert me to them.  Specifically:

namespace foo\bar;

function foobar()
{
       try
       {
               ...
       }
       catch(Exception $e)
       {
               //nothing will be caught
               //I forgot to qualify
               //code silently fails
       }
}

I didn't want to put a whole lot of work into this, so I'm trying to avoid
having to write in C/flex/ANTLR/etc.  There's a bit of grease-monkey
internals stuff in PHP so I thought I would check.

Thanks,
Jeremy

--

--
Alexey Zakhlestin
http://www.milkfarmsoft.com/

Other possibility:
The PEAR package "PHP_UML" can parse PHP files/folders, and generate the API
in the form of a global standard XML file (and/or in the form of a full
XHTML documentation).

Namespaced code is supported.
But the parsed code must be object oriented, not procedural (for now).
Perhaps this could help anyway...

http://pear.php.net/manual/en/package.php.php-uml.intro.php

Baptiste

-----Original Message-----
From: Jeremy [mailto:jeremy@pinacol.com]
Sent: mercredi 25 mars 2009 18:14
To: internals@lists.php.net
Subject: [PHP-DEV] Access to syntax tree?

Is there any way to access the parse tree of a PHP file from within PHP?

I'm trying to write a code-checking utility to find namespace-related
problems in code and alert me to them. Specifically:

namespace foo\bar;

function foobar()
{
try
{
...
}
catch(Exception $e)
{
//nothing will be caught
//I forgot to qualify
//code silently fails
}
}

I didn't want to put a whole lot of work into this, so I'm trying to
avoid having to write in C/flex/ANTLR/etc. There's a bit of
grease-monkey internals stuff in PHP so I thought I would check.

Thanks,
Jeremy

Hello Jeremy,

Is there any way to access the parse tree of a PHP file from within PHP?

I'm trying to write a code-checking utility to find namespace-related
problems in code and alert me to them. Specifically:

namespace foo\bar;

function foobar()
{
try
{
...
}
catch(Exception $e)
{
//nothing will be caught
//I forgot to qualify
//code silently fails
}
}

a little bit off topic here, but PHP_Depend's[1] parser and source graph
in branches/0.9.0[2] can be used to detect such issues. It is aware of
namespaces and can detect most class/interface language constructs like
catch, new, type-hints, static calls etc.

Greetings
Manuel

[1] http://pdepend.org/
[2] http://svn.pdepend.org/branches/0.9.0/

Manuel Pichler http://manuel-pichler.de
GnuPG Key: 6A5D2258 / B4F9 AA42 925D A4AA 4733 4E39 F48B 809C 6A5D 2258

Jeremy wrote:

Is there any way to access the parse tree of a PHP file from within PHP?

I'm trying to write a code-checking utility to find namespace-related
problems in code and alert me to them. Specifically:

namespace foo\bar;

function foobar()
{
try
{
...
}
catch(Exception $e)
{
//nothing will be caught
//I forgot to qualify
//code silently fails
}
}

I didn't want to put a whole lot of work into this, so I'm trying to
avoid having to write in C/flex/ANTLR/etc. There's a bit of
grease-monkey internals stuff in PHP so I thought I would check.

Hi Jeremy,

The parser file needs to be updated to reflect additions in PHP 5.3, but
http://pear.php.net/PHP_Parser provides an example of a parser in which
you could actually check for every class reference at parse-time,
ignoring everything else.

It's built using the tokenizer extension as a lexer, and a port of lemon
to PHP for the parser (zend_language_parser.y is also ported into lemon
format)

Greg