如何将字符串连接到 blade 中的 $variable？

Question

我想将一个变量（在我的例子中称为 $document）从我的数据库添加到 URL 资产目录中 blade 文件使用户能够在 Web 浏览器中查看图像。举例如下；

// MyController File

// the variable $code is a parameter I'm accepting from the web.php route file for 
// the function show() to help process the assignment value of $data['document'] without issues

public function show($code)
    {
        //  NB: I am passing the document as an array list item of $data as below, so I can mention it as 
        //  a variable in the blade view file 
        //  $data['document']

        $data['document'] = Auth::user()->documents->where("code", $code)->first();

        return view("documents.show", $data);
    }



// Blade View File

<div class="my-class" style="background: url({{ URL::asset('assets/storage/' +$document->file_url) }}) no-repeat center top; background-size: cover;">
</div>

Answer 1

您使用了错误的运算符。在JavaScript中，连接运算符是+，但在PHP中，它是.。要使上面的代码正常工作，您只需将其更新为如下所示。

// Blade View File

<div class="my-class" style="background: url({{URL::asset('assets/storage/' . $document->file_url)}}) no-repeat center top; background-size: cover;">
</div>

注意：使用的测试环境是Laravel 7+

Answer 2

你必须这样使用

<div class="my-class" style="background: url({{URL::asset('assets/storage/'. $document->file_url)}}) no-repeat center top; background-size: cover;">

如何将字符串连接到 blade 中的 $variable？

How to concatenate string to a $variable in blade?

variables

laravel

laravel-5

laravel-blade

laravel-7