fsockopen problem

[Steelo]

I've got a function which basicly checks if a URL exists.  It first checks using the fsockopen function and if there is a connection it returns a true value e.g.

<?php
$connection = fsockopn("localhost", 80, $errno, $errstr, 30);
if($connection)
{
    return true;
}
else
{
    return false;
}
?>

It's that simple,  but when the script is run it prompts the user to download the page they are currently viewing.
I also tried adding fclose($connection); before the boolean is returned but it still does it.