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An Error occurred while handling another error:
yii\web\HeadersAlreadySentException: Headers already sent in /oss1/www.zhitiku.cn/controllers/SiteController.php on line 52. in /oss1/www.zhitiku.cn/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /oss1/www.zhitiku.cn/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders()
#1 /oss1/www.zhitiku.cn/vendor/yiisoft/yii2/web/ErrorHandler.php(136): yii\web\Response->send()
#2 /oss1/www.zhitiku.cn/vendor/yiisoft/yii2/base/ErrorHandler.php(123): yii\web\ErrorHandler->renderException(Object(yii\web\HeadersAlreadySentException))
#3 [internal function]: yii\base\ErrorHandler->handleException(Object(yii\web\HeadersAlreadySentException))
#4 {main}
Previous exception:
yii\web\HeadersAlreadySentException: Headers already sent in /oss1/www.zhitiku.cn/controllers/SiteController.php on line 52. in /oss1/www.zhitiku.cn/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /oss1/www.zhitiku.cn/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders()
#1 /oss1/www.zhitiku.cn/vendor/yiisoft/yii2/base/Application.php(392): yii\web\Response->send()
#2 /oss1/www.zhitiku.cn/web/index.php(79): yii\base\Application->run()
#3 {main}