[Andreas]

PHP Code:

if ((($current['year'] - $vbulletin->GPC['year']) <  $vbulletin->options['minjoinage']) OR ((($current['year'] - $vbulletin->GPC['year']) == $vbulletin->options['minjoinage']) AND (($vbulletin->GPC['month'] < $current['month']) OR ($vbulletin->GPC['month'] == $current['month'] AND $current['day'] < $vbulletin->GPC['day'])))) 


OR

PHP Code:

$age = $current['year'] - $vbulletin->GPC['year'];
if ($current['month'] < $vbulletin->GPC['month'] OR ($current['month'] == $vbulletin->GPC['month'] AND date('d') < $vbulletin->GPC['day']))
{
    $age--;
}