ServerSettings

serversettings.php

<?php
    public function onDataPacketReceive(DataPacketReceiveEvent $event): void
    {
        $receivePacket = $event->getPacket();
        if ($receivePacket instanceof ServerSettingsRequestPacket) {
            $responsePacket = new ServerSettingsResponsePacket();
            $responsePacket->formId = 12345;//Form ID
            //適当なCustomFormデータ
            $responsePacket->formData = json_encode([
                "type" => "custom_form",
                "title" => "タイトル",
                "content" => [
                    [
                        "type" => "input",
                        "text" => "入力してください",
                    ],
                ],
            ]);
            $player = $event->getPlayer();
            $this->getScheduler()->scheduleDelayedTask(new ClosureTask(function (int $currentTick) use ($player, $responsePacket): void {
                $player->sendDataPacket($responsePacket);
            }), 20);
        }
    }