connect · swoole-worker

# connect 方法 ```php void AsyncTcpConnection::connect() ``` 執行異步連接操作。此方法會立刻返回。注意：如果需要設置異步連接的onError回調，則應該在connect執行之前設置，否則onError回調可能無法被觸發，例如下面的例子onError回調可能無法觸發，無法捕獲異步連接失敗事件。 ```php $connection = new AsyncTcpConnection('tcp://baidu.com:81'); // 執行連接的時候還沒設置onError回調 $connection->connect(); $connection->onError = function($connection, $err_code, $err_msg) { echo "$err_code, $err_msg"; }; ``` ### 參數無參數 ### 返回值無返回值 ### 示例 Mysql代理 ```php use \Workerman\Worker; use \Workerman\Connection\AsyncTcpConnection; require_once __DIR__ . '/Workerman/Autoloader.php'; // 真實的mysql地址，假設這里是本機3306端口 $REAL_MYSQL_ADDRESS = 'tcp://127.0.0.1:3306'; // 代理監聽本地4406端口 $proxy = new Worker('tcp://0.0.0.0:4406'); $proxy->onConnect = function($connection) { global $REAL_MYSQL_ADDRESS; // 異步建立一個到實際mysql服務器的連接 $connection_to_mysql = new AsyncTcpConnection($REAL_MYSQL_ADDRESS); // mysql連接發來數據時，轉發給對應客戶端的連接 $connection_to_mysql->onMessage = function($connection_to_mysql, $buffer)use($connection) { $connection->send($buffer); }; // mysql連接關閉時，關閉對應的代理到客戶端的連接 $connection_to_mysql->onClose = function($connection_to_mysql)use($connection) { $connection->close(); }; // mysql連接上發生錯誤時，關閉對應的代理到客戶端的連接 $connection_to_mysql->onError = function($connection_to_mysql)use($connection) { $connection->close(); }; // 執行異步連接 $connection_to_mysql->connect(); // 客戶端發來數據時，轉發給對應的mysql連接 $connection->onMessage = function($connection, $buffer)use($connection_to_mysql) { $connection_to_mysql->send($buffer); }; // 客戶端連接斷開時，斷開對應的mysql連接 $connection->onClose = function($connection)use($connection_to_mysql) { $connection_to_mysql->close(); }; // 客戶端連接發生錯誤時，斷開對應的mysql連接 $connection->onError = function($connection)use($connection_to_mysql) { $connection_to_mysql->close(); }; }; // 運行worker Worker::runAll(); ``` **測試** ```php mysql -uroot -P4406 -h127.0.0.1 -p Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 25004 Server version: 5.5.31-1~dotdeb.0 (Debian) Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> ```