referencing wikipedia

I have trying to use a simple program to retrieve a page, something like:

<?php

$opts = array(
'http'=>array(
'method'=>"GET",

)
);

$context = stream_context_create($opts);


$fp = fopen('http://forums.digitalpoint.com/forumdisplay.php?f=17', 'r', false,$context);
fpassthru($fp);
fclose($fp);

?>

which works well.But when I refer any wiki page.it generates an error.
can u plz tell me where is the problem?

TIA

 

What error?

 

it shows some garbage values.