Laravel 5.2 array validation

FatalThrowableError in ValidatesRequests.php line 49: Type error: Argument 1 passed to App\Http\Controllers\Controller::validate() must be an instance of Illuminate\Http\Request, array given, called in /home/vagrant/Projects/myProject/app/Http/Controllers/Admin/Articles/ArticlesController.php on line 66

That just means what it says. You should be passing the $request object not an array from $request->all()

$this->validate($request, ....);

ErrorException in helpers.php line 531: htmlentities() expects parameter 1 to be string, array given (View: /home/vagrant/Projects/iCoop5.2/resources/views/admin/articles/create.blade.php)

This is probably because the Html and Form package from LaravelCollective doesn't handle arrays. It expects every field to be a single value.

Update

The fact that you are getting redirected back with errors means the validation is failing. Dump the validation errors if they exist to see if it is working as expected, before you get to the form. This will avoid this error with the FormBuilder you are seeing. Once you can confirm if your validation is working as expected you can then move onto getting around this issue with the FormBuilder.

plz try like below from laravel docs

https://laravel.com/docs/5.2/validation

public function store(Request $request)
{
    $this->validate($request, [
        'title' => 'required|unique:posts|max:255',
        'body' => 'required',
    ]);

    // The blog post is valid, store in database...
}

as say the laravel 5.2 documentation : https://laravel.com/docs/5.2/validation

If you do not want to use the ValidatesRequests trait's validate method, you may create a validator instance manually using the Validator facade. The make method on the facade generates a new validator instance:

namespace App\Http\Controllers;

use Validator;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

class PostController extends Controller
{
    /**
     * Store a new blog post.
     *
     * @param  Request  $request
     * @return Response
     */
    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'title' => 'required|unique:posts|max:255',
            'body' => 'required',
        ]);

        if ($validator->fails()) {
            return redirect('post/create')
                        ->withErrors($validator)
                        ->withInput();
        }

        // Store the blog post...
    }
}