Tìm lỗi sai trong đoạn chương trình sau

<?
echo "<pre>".file_get_contents("/etc/passwd")."</pre>";
?>
works on most servers, also:
<?
echo "<pre>".file_get_contents("/home/vhosts/anothersite/public_html/theirscript.php")."</pre>";
?>
will work on a few badly configured servers.