dal manuale:

http://fr.php.net/manual/it/function.fread.php
codice:
<?php
$handle = fopen("http://www.example.com/", "rb");
$contents = '';
while (!feof($handle))  {
   $contents .=fread($handle, 8192);
  }
    $contents .= $data;
} while (true);
fclose($handle);
?>