Php 从for循环中获取值

我想在php中获取for循环值我有一些名称，我想在每个名称后添加“/”，并在循环外打印值，我想从for循环中获取$approver\u名称

foreach($co_practice as $co_practice_approver){
    // global $approver_name;
    if ($j >= 1) {
        $approver = users::where('id','=',$co_practice_approver)->first()->firstname;
        $approver_name = $approver_name . ' / ' . $approver;    
    } else {
        $approver_name = users::where('id','=',$co_practice_approver)->first()->firstname;
    }
}

 Hello {{$approver_name}}

---

现在，我得到了输出“hello”而没有approver\u name如何打印我为循环获取的approver\u name

为什么不立即获取

approver

的

firstname

？在循环中获取数据将导致数据库中出现多个查询。相反，你可以使用

YourController.php

public function yourMethod {
    // your other logic here...

    // this will query to get all users matching ids in $co_practice array
    // and pluck() will get the array of user's firstname 
    $firstNames = UserModel::whereIn('id', $co_practice)->pluck('firstname');

    // this will concatenate firstnames separated by '/'
    $approver_name = implode(' / ', $firstNames->all());

    // this will pass the $approver_name variable to view
    return view('your_blade_file', compact('approver_name'));
}

//now you can print the $approver_name
Hello {{ $approver_name }}

您的_blade_文件.blade.php

public function yourMethod {
    // your other logic here...

    // this will query to get all users matching ids in $co_practice array
    // and pluck() will get the array of user's firstname 
    $firstNames = UserModel::whereIn('id', $co_practice)->pluck('firstname');

    // this will concatenate firstnames separated by '/'
    $approver_name = implode(' / ', $firstNames->all());

    // this will pass the $approver_name variable to view
    return view('your_blade_file', compact('approver_name'));
}

//now you can print the $approver_name
Hello {{ $approver_name }}

---

问题是？你记得吗？这是一个.blade文件吗？我想你的语法是错误的尝试从

{{$approver\u name}}

中删除

{{{{}}

你能显示完整的视图吗？是的，这是一个刀片文件。当我在forloop外部获取approver值时，会打印approver\u名称。请看$approver\u名称已经被覆盖，如果结果返回null，你只会看到

Hello