The new release of phpAspect is coming soon

Since the end of the Google Summer of Code, it was a crazy time at school so I didn't had time to do a release of my work.
I have two weeks of holidays very soon, there will be dedicated to the release of phpAspect.
Basically, I need to clean up some piece of code and finish to write the documentation.
I'm very excited about this new release, I can't wait that you can play with the new joinpoints we designed and the logical engine we introduced.

Google Code Hosting just released two new cool features: A wiki and a download tab.
I intend to get full benefits from these features for phpAspect ;-)

Happy hollidays everybody !

The Parse Tree generator

I put this form online so you can try the parse tree extension without installing it:http://phpaspect.org/ast.
You can upload your own php script and get the xml tree or the tree visualization in png format.

I also put a mini documentation on a wiki page: http://phpaspect.org/wiki/doku.php?id=parse_tree.

If you have any question regarding parse_tree, you can ping the googlegroups associated to it:php_parse_tree@googlegroups.com.

Picture of GSoCers

Uros Trebec posted on his blog the picture of all the GSoCers present during the London Googleplex visit.

Visit of the London Googleplex

Last friday I went to London to visiting the Google office with other GSoCers.First of all, I went to London to visit Google and I had no idea how great it would be to met other GSoCers. Everybody were nice, funny and very excited about theirs projects.

We had a nice lunch (with sushis, I love sushis !!!) and we had a round table with Chris Di Bona and Zaheda Bhorat where everyone did an self-introduction. It was a chance to know a little bit more about everybody and it also was a chance to see in what kind of studies we're all involved. Then we did the lightning talk presentations and we had a big chat about the Google Summer of Code: what was great, what went wrong, what is next, what could be improved etc.
A Googler came to talk to us about being an engineer at Google and we did a visit of the Office.

It was very enriching at so many level. I learned more about the Google work environment, what kind of relationship Google has with the Open source world, how awesome GSoCers are and it was also a great opportunity to know more about being an engineers at Google.

You can get the pdf version here.

Visualize the parse tree of a PHP source code

 wrote this xslt stylesheet to visualize the parse tree of a PHP source code.
The stylesheet can actually convert any XML tree to a graph in the dot format interpreted by Graphviz.

The code to vizualize nice parse tree with the PECL extension is the following:

//Loading the parse tree into a DOMDocument
$xml = new DOMDocument;
$xml->loadXML(parse_tree_from_file('order.php'), XML_OPTIONS);
//Loading the stylesheet into a DOMDocument
$xsl = new DOMDocument;
$xsl->load('toDot.xsl', XML_OPTIONS);
//Stylesheet processing
$proc = new XSLTProcessor;
$proc->importStyleSheet($xsl);
//Generating the image with graphviz
file_put_contents('order.dot', trim($proc->transformToXML($xml)));
`dot -T png -o order.png order.dot`

So if order.php contains the following source code:

class Order{
    private $items = array();
    private $amount = 0;
 
    public function addItem($reference, $quantity){
        $this->items[] = array($reference, $quantity);
        $this->amount += $quantity*Catalog::getPrice($reference);
    }
 
    public function getAmount(){
        return $this->amount;
    }
}
class Catalog{
    private static $priceList = array('Largo Winch' => 9.31, 'Astérix' => 8.46, 'XIII' => 8.70);
 
    public static function getPrice($reference){
        return self::$priceList[$reference];
    }
}
$myOrder = new Order;
$myOrder->addItem('Largo Winch',2);
$myOrder->addItem('Astérix',2);

You'll get the following tree:
To test this example at home, you need the Parse Tree pecl extension, an xslt proc and graphviz:
order.php is the original php file.
order.xml is the xml generated with the parse_tree_from_file function.
order.dot is the parse tree in dot format.
order.png is the png generated by graphviz.
toDot.xsl isthe stylesheet generating dot from xml.

A Logo for phpAspect.

Fabien Nicollet created a logo for phpAspect:

Fabien is also a student at Telecom Lille and he does freelance work in design and graphics.
So if you need any work done in this field, don't hesitate to hire his talents ;-)

Thank you, Fabien!

phpAspect presented at the EPFL

Last week I was invited by Christelle Vangenot to talk about phpAspect with Philippe Rochat and some of the new features I developed during the Google Summer of code.

The slides are availables at this address: http://phpaspect.org/conferences/poa_epfl.pdf

I'll make a futher post on this blog to talk about the end of the Google soc and the new version of phpAspect which should be released soon.