simple looping

[eluser]metaltapimenye[/eluser]
i'm quiet new in OOP kind of stuff..
how can i make loop kind like $i++ kind of stuf?

i've make..

Code:

$year_present=date('Y');$data['year_present']=$year_present;
$e=$year_present-80;
while ($y >= $e) {
    $data['year_arr'] .= $y;
$y--; }

and put it to view with form helper with

Code:

form_dropdown('birthyear',$year_arr,$year_present)

but its stuck at 'while' part >_<