reading value from an Gtkentry() ?

hi,

i played around with php-gtk for a little while,
i followed a few tutorials, read through source code and im now able to 
create containers, boxes, buttons, entry fields, new windows etc etc...

but im totaly lost on 'business logic' side of things here.

my question:

for instance,
how does one connect a button to an entry field so that the typed in text 
gets stored in a var after clicking the button?

example code snippet of how i expected it to work:
-------------------------------------------
// a var to store the result in
$daText="";

// a happy entry field
$anEntry = &new Gtkentry();
$anEntry->select_region(0,5);
$aBox->pack_start($anEntry);
$anEntry->show();

// a jolly button
$aButton->&new Gtkbutton('OK');
$aButton->connect('clicked','dosomething($anEntry)'); // doesnt work!
$aBox->pack_start($aButton);
$aButton->show();

// this following function is also wrong but it might give you the
// general idea of what im trying to accomplish

function dosomething($entryObj){

	$daText=$entryObj->getValue();

}
-------------------------------------------

hope someone can help me out here since there isnt any nice
documentation yet, that is,
i havent found any yet.
but i really like this gtk stuff allready!