原因是：laravel 5中的未定义变量

Question

您好我是Laravel的新手并使用Laravel 5处理我的第一个项目。当我从控制器传递数据到视图时，我收到此错误。我被困了三天。我已经检查了所有来自在线博客的问题，甚至是stackoverflow，但无法找到解决方案，请帮忙。这是我的代码：

App\Routes\web.php    
Route::get('/list', 'CustomerController@list');    
App\Http\Controllers\CustomerController.php

public function list(){
    $first = 'Mian';
    $last = 'Amir';
    $fullName = $first . " " . $last;
    //dd($fullName);
    return view('new')->with("fullName", $fullName);
    //return view('new')->withFullName($fullName);
}

Resources\Views\new.blade.php

@extends('master')    
@section('content')

<h1>New Content Will Goes Here: {{$fullName}}</h1>    

@endsection

我也尝试了这些：

//return view('new')->with('customer', $customers);
//return View::make('new')->with(array('customers' => $customers));
// return View::make('new', compact('customers'));
/$customers = DB::table('customers')->get();

//return view('new', ['customers' => $customers]);
//return View::make('new', compact('customers'));
//return View::make('new')->with('customers', $customers);
//dd($customers);
//return View::make('new')->with(array('customers' => , $customers));

//$customers = Customer::all();
//dd($customers);
//return View::make('view')->with('customers', $customers);
//return View::make('view', compact('customers'));
//return $view->with('customers', $customers)->with('q', $q);
//return view('view', ['key' => 'The big brown fox jumped over the lazdog']);
//$key = 'If a would chuck can chuck wood,';
//return view('view', compact('key'));

这是错误页面：

Answer 1

将其作为

传递

return View('new')->with(['fullName' => $fullName]);

Answer 2

您可以以多种方式将变量传递到视图中

    public function list(){
        $first = 'Mian';
        $last = 'Amir';
        $fullName = $first . " " . $last;

        return view('new')->with(["fullName"=>$fullName]);  //Or
        return view('new', ["fullName"=>$fullName]);     //Or
        return view('new', compact("fullName"));       //Or

        Session::put('fullName', $fullName); 
        return view('new');  //then in view- Session::get('fullName');

        //Or using dynamic method which I personally dislike without any reason! :P
        return view('new')->withFullName($fullName); 
       //But i this case in view you have to use underscored variable $full_name !!!

    }

希望这些能帮助新手。

Answer 3

laravel中有多种灵活的可能性

 return view('new')->withFullName($fullName); 

或

return view('new')->with('fullName' , $fullName); 

或

    return view('new',compact ('fullName')) 

source