请问下,我在基本开发模型下使用PDO链接mysql,出现错误时,直接被exit了,我trycatch也没用,怎么办?

请问下,我在基本开发模型下使用PDO链接mysql,出现错误时,直接被exit了,我trycatch也没用,怎么办?

exception 'PDOException' with message 'SQLSTATE: Integrity constraint violation: 1062 Duplicate entry 'huayz' for key 'user'' in /root/new_workerman/applications/Game/core/DbConnection.class.php:1583 Stack trace: #0 /root/new_workerman/applications/Game/core/DbConnection.class.php(1583): PDOStatement->execute() #1 /root/new_workerman/applications/Game/core/DbConnection.class.php(1664): DbConnection->execute('INSERT INTO `us...', Array) #2 /root/new_workerman/applications/Game/control/index.ctl.php(60): DbConnection->query() #3 /root/new_workerman/applications/Game/index.php(32): IndexControl->register() #4 /root/new_workerman/workerman/Common/WebServer.php(223): include('/root/new_worke...') #5 /root/new_workerman/workerman/Core/SocketWorker.php(412): WebServer->dealProcess('GET /?a=registe...') #6 : Man\Core\SocketWorker->dealInputBase(Resource id #58, 1, 58) #7 /root/new_workerman/workerman/Core/Events/Select.php(190): call_user_func_array(Array, Array) #8 /root/new_workerman/workerman/Core/SocketWorker.php(242): Man\Core\Events\Select->loop() #9 /root/new_workerman/workerman/Core/Master.php(446): Man\Core\SocketWorker->start() #10 /root/new_workerman/workerman/Core/Master.php(360): Man\Core\Master::createOneWorker('StatisticWeb') #11 /root/new_workerman/workerman/Core/Master.php(639): Man\Core\Master::spawnWorkers() #12 /root/new_workerman/workerman/Core/Master.php(579): Man\Core\Master::checkWorkerExit() #13 /root/new_workerman/workerman/Core/Master.php(186): Man\Core\Master::loop() #14 /root/new_workerman/workerman/bin/workermand(115): Man\Core\Master::run() #15 {main}