在 YII2 中找不到类“Html”

Question

Finally I try YII2 (can't move on from yii1) in my simple website project. I've Fatal ERROR Class 'Html' not found in my views.

Case 1. I put use yii\\helpers\\Html; in main (layout directory). When I write Html::img('@web/logo.jpg') in index(view directory)I've got error 'html not found'.

Case 2. I write Html::img('@web/logo.jpg') in main (layout directory) running well.

case 3. I delete use yii\\helpers\\Html in main (layout directory). and I write use yii\\helpers\\Html in index (view directory) running well, my image can show.

so, what's my mistake. Why I can't Html in index.

Answer 1

Every single file needs to use fully qualified namespaces or have them as use declarations.

So every file where you are using Html::... needs to get this, not only layout file.

Answer 2

use

yii\helpers\Html;

HTML provides a set of static methods for generating commonly used HTML tags.

Nearly all of the methods in this class allow setting additional html attributes for the html tags they generate. You can specify, for example, class, style or id for an html element using the $options parameter. See the documentation of the tag() method for more details.

Answer 3

在此更改重置您的 Web 服务器后，取消注释 short_open_tag 并设置值 ON，也使用文件顶部的类元素