我正在尝试对基于 Yii 2 框架的留言簿应用程序提交评论。在我的 PC 上的本地主机上一切正常,但在共享主机上,当我想在 View 中提交评论时,出现此错误。
这里是错误:
An error occurred while handling another error:
exception 'yii\web\HeadersAlreadySentException' with message 'Headers already sent in /home/mahdikas/public_html/guestbook/controllers/PostController.php on line 117.' in /home/mahdikas/public_html/guestbook/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /home/mahdikas/public_html/guestbook/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders()
#1 /home/mahdikas/public_html/guestbook/vendor/yiisoft/yii2/web/ErrorHandler.php(135): yii\web\Response->send()
#2 /home/mahdikas/public_html/guestbook/vendor/yiisoft/yii2/base/ErrorHandler.php(111): yii\web\ErrorHandler->renderException(Object(yii\web\HeadersAlreadySentException))
#3 [internal function]: yii\base\ErrorHandler->handleException(Object(yii\web\HeadersAlreadySentException))
#4 {main}
Previous exception:
exception 'yii\web\HeadersAlreadySentException' with message 'Headers already sent in /home/mahdikas/public_html/guestbook/controllers/PostController.php on line 117.' in /home/mahdikas/public_html/guestbook/vendor/yiisoft/yii2/web/Response.php:366
Stack trace:
#0 /home/mahdikas/public_html/guestbook/vendor/yiisoft/yii2/web/Response.php(339): yii\web\Response->sendHeaders()
#1 /home/mahdikas/public_html/guestbook/vendor/yiisoft/yii2/base/Application.php(392): yii\web\Response->send()
#2 /home/mahdikas/public_html/guestbook/web/index.php(12): yii\base\Application->run()
#3 {main}
在 postController 中我有这段代码:
public function actionAdd_comment()
{
//print_r($_POST);
$model = new \app\models\Comments;
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
$model->comment_date = date('Y-m-d H:i:s');
if ($model->save()) {
echo 'Thanks for your comment.';
} else {
echo 'Failed!';
}
}
}
错误中第117行是:
echo 'Thanks for your comment.';
我该如何解决这个问题?
最佳答案
从 Yii 2.0.14 开始,您不能在 Controller 中回显。必须返回响应:
public function actionAdd_comment() {
$model = new \app\models\Comments();
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
$model->comment_date = date('Y-m-d H:i:s');
if ($model->save()) {
return 'Thanks for your comment.';
} else {
return 'Failed!';
}
}
}
您也可以调用exit
在你的方法结束时防止进一步处理或用 ob_start()
包装你的代码和 ob_get_clean()
,如果您无法避免 echo 。
public function actionAdd_comment() {
$model = new \app\models\Comments();
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
$this->someMagicWithEcho();
exit;
}
}
或
public function actionAdd_comment() {
$model = new \app\models\Comments();
if ($model->load(Yii::$app->request->post()) && $model->validate()) {
ob_start();
$this->someMagicWithEcho();
return ob_get_clean();
}
}
关于php - "An error occurred while handling another error: yii\web\HeadersAlreadySentException",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49689315/