$o = '<h3>Webfinger Diagnostic</h3>';
$o .= '<form action="webfinger" method="get">';
- $o .= 'Lookup address: <input type="text" style="width: 250px;" name="addr" value="' . $_GET['addr'] .'" />';
+ $o .= 'Lookup address: <input type="text" style="width: 250px;" name="addr" value="' . defaults($_GET, 'addr', '') .'" />';
$o .= '<input type="submit" name="submit" value="Submit" /></form>';
$o .= '<br /><br />';