testTask.php

<?php

    namespace パス;

    use pocketmine\scheduler\PluginTask;

    class StatusTask extends PluginTask {
    
        public $player;

        public function __construct($owner, $player) {
            parent::__construct($owner);
            $this->player = $player;
        }

        public function onRun(int $ticks) {
            $this->player->sendMessage("こんにちは！");
        }
    }