Game-Jaming/Backend/Controllers/Group/UpdateGruop.php

<?php
require_once "../../../bootstrap.php";
require_once "Group.php";

use Backend\Models\Group;

if (isLogin()) {
    if (isset($_POST['updateGroup'])) {
        if ($group = groupViaToken($_SESSION['token'])) {
            $group->group_name = $_POST['groupName'];
            if (!$group->save()) {
                http_response_code(500);
            } else {
                http_response_code(200);
            }
        } else {
            http_response_code(400);
            echo json_encode(["message" => "group not found"]);
        }
    } else {
        http_response_code(400);
    }
} else {
    http_response_code(401);
    echo json_encode(["message" => "is not login"]);
}