# onMessage ## 說明: ```php callback Connection::$onMessage ``` 作用與[Worker::$onMessage](315148)回調相同，區別是只針對當前連接有效，也就是可以針對某個連接的設置onMessage回調。 ## 范例 ```php use Workerman\Worker; require_once __DIR__ . '/Workerman/Autoloader.php'; $worker = new Worker('websocket://0.0.0.0:8484'); // 當有客戶端連接事件時 $worker->onConnect = function($connection) { // 設置連接的onMessage回調 $connection->onMessage = function($connection, $data) { var_dump($data); $connection->send('receive success'); }; }; // 運行worker Worker::runAll(); ``` 上面代碼與下面的效果是一樣的 ```php use Workerman\Worker; require_once __DIR__ . '/Workerman/Autoloader.php'; $worker = new Worker('websocket://0.0.0.0:8484'); // 直接設置所有連接的onMessage回調 $worker->onMessage = function($connection, $data) { var_dump($data); $connection->send('receive success'); }; // 運行worker Worker::runAll(); ```