How add Custom Validation Rules when using Form Request Validation in Laravel 5

Question

I am using form request validation method for validating request in laravel 5.I would like to add my own validation rule with form request validation method.My request class

Answer 1

Alternatively to Adrian Gunawan's solution this now also can be approached like:

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class StoreBlogPost extends FormRequest
{
    public function rules()
    {
        return [
            'title' => ['required', 'not_lorem_ipsum'],
        ];
    }

    public function withValidator($validator)
    {
        $validator->addExtension('not_lorem_ipsum', function ($attribute, $value, $parameters, $validator) {
            return $value != 'lorem ipsum';
        });

        $validator->addReplacer('not_lorem_ipsum', function ($message, $attribute, $rule, $parameters, $validator) {
            return __("The :attribute can't be lorem ipsum.", compact('attribute'));
        });
    }
}