当网址为 /case 或者 /case/ 时，Yii getAlias 生成的图片地址不一样，进而导致 404

1、视图中代码实现如下

当网址为 http://official.local/case 时，生成的 ，图片地址为 http://official.local/static/images/header/top.png，响应 200

当网址为 http://official.local/case/ 时，生成的 ，图片地址为 http://official.local/case/images/top.png ，响应 404。怎样解决？如图1

图1

2、查看 http://official.local/case/ 的页面源代码，生成的 ，图片地址为 http://official.local/case/images/top.png ，响应 404。如图2

图2

3、查看 Debug，原来已经报错，且响应 404 yii\base\InvalidRouteException: Unable to resolve the request “case/”. ，如图3

图3

yii\base\InvalidRouteException: Unable to resolve the request "case/". in C:\wwwroot\official-website-management-system\src\vendor\yiisoft\yii2\base\Module.php:561
Stack trace:
#0 C:\wwwroot\official-website-management-system\src\vendor\yiisoft\yii2\web\Application.php(103): yii\base\Module->runAction('case/', Array)
#1 C:\wwwroot\official-website-management-system\src\vendor\yiisoft\yii2\base\Application.php(384): yii\web\Application->handleRequest(Object(yii\web\Request))
#2 C:\wwwroot\official-website-management-system\src\frontend\web\index.php(18): yii\base\Application->run()
#3 {main}

Next yii\web\NotFoundHttpException: Page not found. in C:\wwwroot\official-website-management-system\src\vendor\yiisoft\yii2\web\Application.php:115
Stack trace:
#0 C:\wwwroot\official-website-management-system\src\vendor\yiisoft\yii2\base\Application.php(384): yii\web\Application->handleRequest(Object(yii\web\Request))
#1 C:\wwwroot\official-website-management-system\src\frontend\web\index.php(18): yii\base\Application->run()
#2 {main}

4、最终实现了一个小的帮助类方法

    public static function url($path): string
    {
        $cdn = Yii::$app->params['cdnDomainHttps'] ?? '';
        return rtrim($cdn, '/') . '/' . ltrim($path, '/');
    }

<img loading="lazy" class="top-icon" src="<?= CdnHelper::url('statics/images/header/top.png') ?>">