$worker->onWorkerStart = function($worker)
{
? ? // 將db實(shí)例存儲在全局變量中(也可以存儲在某類的靜態(tài)成員中)
? ? global $db1;
? ? global $db2;
? ? global $db3;
? ? ...
? ? $db1 = new \Workerman\MySQL\Connection('host', 'port', 'user', 'password', 'db_name1');
? ? $db2 = new \Workerman\MySQL\Connection('host', 'port', 'user', 'password', 'db_name2');
? ? $db3 = new \Workerman\MySQL\Connection('host', 'port', 'user', 'password', 'db_name3');
? ? ...
};