session_start(): Cannot send session cookie - headers already sent by (output started at /www/wwwroot/xuequ/thinkphp/base.php:51)

Call Stack

1. in Session.php line 106
2. at Error::appError(2, 'session_start(): Can...', '/www/wwwroot/xuequ/t...', 106, ['config' => ['id' => '', 'var_session_id' => '', 'prefix' => 'think', ...], 'isDoStart' => true, 'class' => '\think\session\drive...'])
3. at session_start() in Session.php line 106
4. at Session::init() in Session.php line 120
5. at Session::boot() in Session.php line 164
6. at Session::get('saas_pid_id', null) in helper.php line 304
7. at session('saas_pid_id') in AppController.php line 68
8. at AppController->filter() in AppController.php line 53
9. at AppController->_initialize() in Controller.php line 59
10. at Controller->__construct(object(Request))
11. at ReflectionClass->newInstanceArgs([object(Request)]) in App.php line 359
12. at App::invokeClass('app\index\controller...') in Loader.php line 479
13. at Loader::controller('index', 'controller', false, 'Error') in App.php line 576
14. at App::module(['index', 'index', 'index'], ['app_host' => '', 'app_debug' => true, 'app_trace' => false, ...], false) in App.php line 457
15. at App::exec(['type' => 'module', 'module' => ['index', 'index', 'index'], 'convert' => false], ['app_host' => '', 'app_debug' => true, 'app_trace' => false, ...]) in App.php line 139
16. at App::run() in start.php line 19
17. at require('/www/wwwroot/xuequ/t...') in index.php line 21