[Adrian Schneider]

Here:

<?php
require_once('./global.php');
$host = localhost;
$user = *****;
$dbp = *****;
$db = *****;

mysql_connect($host, $user, $dbp);
mysql_select_db($db);

$icao = mysql_query("
	SELECT field7
	FROM userfield
	WHERE userid = " . $vbulletin->userinfo['userid'] . "
");
$icao = mysql_fetch_aray($icao);


?>

<iframe width="100%" src="http://www.weathermeister.com/html/metar?idents=<?php echo $icao['field'7]; ?>"/>

If it is your vBulletin database, you can reduce it to this:

<?php

require_once('./global.php');

?>

<iframe width="100%" src="http://www.weathermeister.com/html/metar?idents=<?php echo $vbulletin->userinfo['field7']; ?>"/>