array('required' => true, 'regex' => '/[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}/')
            ));
            if($validator->isValid($_POST)) {
                $statementMembership = $RUNTIME['PDO']->prepare("DELETE FROM os_groups_membership WHERE GroupID = ? AND PrincipalID = ?");
                $statementMembership->execute(array($_REQUEST['group'], $_SESSION['UUID']));
            }
        }
        header('Location: index.php?page=groups');
        die();
    }
    include 'app/OpenSim.php';
    $opensim = new OpenSim();
    $HTML->setHTMLTitle("Gruppen");
    $HTML->importSeitenInhalt("deine-regionen.html");
    $table = '
| Name | GrĂ¼nder | Aktionen | 
|---|
%%ENTRY%%
';
    
    $statementGroups = $RUNTIME['PDO']->prepare("SELECT Name,FounderID,os_groups_membership.GroupID FROM os_groups_groups JOIN os_groups_membership ON os_groups_groups.GroupID = os_groups_membership.GroupID WHERE PrincipalID = ?");
    $statementGroups->execute(array($_SESSION['UUID']));
    while($rowGroups = $statementGroups->fetch()) 
    {
        $entry = '| '.htmlspecialchars($rowGroups['Name']).' | '.htmlspecialchars($opensim->getUserName($rowGroups['FounderID'])).' |  | 
';
        $table = str_replace("%%ENTRY%%", $entry."%%ENTRY%%", $table);
    }
    $table = str_replace("%%ENTRY%%", "", $table);
    $HTML->ReplaceSeitenInhalt("%%REGION-LIST%%", $table);
    $HTML->build();
    echo $HTML->ausgabe();
?>