htmlspecialchars（）期望參數1是字符串，數組給定laravel

Question

我試圖根據價格（從高到低和從低到高）在搜索頁面中記錄（旅遊），用提交更改的表單事件。下面是窗體的代碼：

{!!Form::open(['route' => 'short','method' => 'GET', 'role' => 'search','class'=>'select-filters'])!!} 
    <input type="hidden" name="country" value="{{$country}}"> 
    <input type="hidden" name="category" value="{{$category}}"> 
    <input type="hidden" name="days" value="{{$days}}"> 
    <select name="sort_price" id="sort-price" onchange="this.form.submit()"> 
    <option value="" selected="">Sort by price</option> 
    <option value="lower">Lowest price</option> 
    <option value="higher">Highest price</option> 
    </select> 
{!! Form::close() !!} 

，我已經初始化值在同一個頁面，但給錯誤htmlspecialchars() expects parameter 1 to be string, array given：

@if(Request::only('country') != null) 
    {{$country = Request::only('country')}} 
@else 
    {{ $country = null }} 
@endif 
@if(Request::only('category') != null) 
    {{$category = Request::only('category')}} 
@else 
    {{ $category = null }} 
@endif 
@if(Request::only('days') != null) 
    {{$days = Request::only('days')}} 
@else 
    {{ $days = null }} 
@endif 

在Request::only()值被從搜索表單傳遞在索引頁面。當我死和轉儲：

{{dd(Request::only('country','category','days'))}} 

我拋出以陣列形式傳入的值

它轉儲專用密鑰值對，如果我只傳遞一個參數：

{{dd(Request::only('country'))}} 

或

 {{dd(Request::only('category'))}} 

或

 {{dd(Request::only('days'))}} 

Answer 1

only()總是返回一個數組，所以要得到一個字符串做到這一點：

{{ request('country') }} 

取而代之的是：沒有雙引號

{{ Request::only('country') }}