laravel pass data from blade to controller code example

Example 1: how to pass data to controller in laravel

$dept = DB::table('master_department')->get();
$design = DB::table('master_designation')->get();
return view('registration', ['dept' => $dept], compact('design'));

#if we send as array
@foreach($dept as $key=>$d)
	{{ $dept[$key]->dept_title }}
@endforeach

#if we send as compact object
@foreach($design as $deg)
	<option value="{{ $deg->id }}">{{ $deg->deg_title }}</option>							
@endforeach

Example 2: passing data from controller to blade view laravel

<?php
namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

   class EventController extends Controller
{

public function index(Request $request)
{
    $id = $request->query('id');
    $event = DB::table('events')->where('id',$id)->get();
    $pics = DB::table('pictures')->where('event_id',$id)->get();

return view('pages.eventPage',compact('event','pics'));

}

}