问题
I've tried to use the Laravelcollective/html on laravel 5.5 by loading the v5.4 in my composer.json file but that didn't work. This is the code in the composer.json file:
"laravelcollective/html":"^5.4.0",
and loading it into my app configuration file app.php: inside the providers array
Collective\Html\HtmlServiceProvider::class,
But after i used the blade code to create the form it didn't work, here's the blade code.
{!! Form::open(['route' => 'posts.store']) !!}
{{Form::label('title','Title:')}}
{{Form::text('title', null, array('class' => 'form-control') )}}
{!! Form::close() !!}
    回答1:
In composer.json, add:
"require": {
    // ...,
     "laravelcollective/html": "^5.4.0"
    // ...,
 },
In app/config/app.php, add the following to each array:
'providers' => [
    // ...,
    Collective\Html\HtmlServiceProvider::class,
    // ...
],
'aliases' => [
    // ...,
    'Form' => Collective\Html\FormFacade::class,
    'Html' => Collective\Html\HtmlFacade::class,
    // ...
],
And in your blade file:
{!! Form::open(['route' => 'posts.store']) !!}
{!! Form::label('title', 'Title:') !!}
{!! Form::text('title', null, array('class' => 'form-control')) !!}
{!! Form::close() !!}
Then run $ composer require laravelcollective/html:^5.4.0 after adding the above. :)
回答2:
You can use this command
composer require --update-with-all-dependencies "laravelcollective/html 5.6.*"... since you are using laravel 5.5 the command to use will be 
composer require "laravelcollective/html 5.5.*"
    回答3:
You also have to add the following to your alias array:
'aliases' => [
// ...
  'Form' => Collective\Html\FormFacade::class,
  'Html' => Collective\Html\HtmlFacade::class,
// ...
],
回答4:
The syntax you are using is old style.
{{Form::label('title','Title:')}} 
It needs to be
{!! Form::label('title','Title:') !!}
    回答5:
You can do it in laravel 5.5 too.
Step 1: Install from Command: composer require "laravelcollective/html":"^5.5"
Step 2: After install you have to add providers and aliases in config/app.php file, so let' follow bellow file how to add.
Step 2.1:
<?php
'providers' => [
    // ...
    Collective\Html\HtmlServiceProvider::class,
    // ...
  ],
'aliases' => [
    // ...
      'Form' => Collective\Html\FormFacade::class,
      'Html' => Collective\Html\HtmlFacade::class,
    // ...
  ],
Step 3: After added above providers, you have to check on your project.
Step 4: Done.
Thanks.
回答6:
it Simple use this one:
composer require laravelcollective/html
    来源:https://stackoverflow.com/questions/46392542/laravelcollective-html-not-working-in-laravel-5-5