Making random password including number and symbol in Laravel 5

SampleController.php

<?php

use Illuminate\Support\Collection;

class SampleController extends Controller
{
  private function makeRandomPassword()
    {
        $collectionA = collect(range('a', 'z'))->random(4)->all();
        $collectionB = collect(range('A', 'Z'))->random(4)->all();
        $collectionC = collect(range(0, 9))->random(3)->all();
        $collectionD = collect(['!','$','%','&','(',')','*','+','/'])->random(2)->all();//記号めんどくさいのでちょっと省略
        $passwordstr = array_merge($collectionA,$collectionB,$collectionC,$collectionD);
        return str_shuffle(implode($passwordstr));
    }
}