Description:
------------
Whenever i try either of the two codes that I listed, all i get is a blank screen

Reproduce code:
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<?php
readfile("http://www.php.net/");
?>

<?php
$fp = fopen("http://www.php.net/","r");
fclose($fp);
?>

Expected result:
----------------
The page http://www.php.net/ will be shown

Actual result:
--------------
I get a blank page