Basic code snippet setting up a database transaction using DB facade methods

ExampleController.php

<?php

namespace App\Controllers;

use App\Models\User;
use App\Models\Verification;
use Illuminate\Support\Facades\DB;
use Illuminate\Http\Request;


class ExampleController extends Controller {
  public function registerUser(Request $request) {
    try {
      DB::beginTransaction(); // Tell Laravel all the code beneath this is a transaction
      $user = User::create($request->all());
      Verification::create([
          'user_id' => $user->id,
          'code' => str_pad(random_int(0, 9999), "4", "0", STR_PAD_LEFT),
          'expires_at' => Carbon::now()->addHours(2)
      ]);
      // Call other functions, they're still part of this transaction
      $this->generateModelsFromUploadedData($user, $request->file('uploaded_file')); 
      DB::commit(); // Tell Laravel this transacion's all good and it can persist to DB
      return response([
          'message' => "User created successfully",
          'status' => "success"
      ], 200);
        } catch(\Exception $exp) {
            DB::rollBack(); // Tell Laravel, "It's not you, it's me. Please don't persist to DB"
            return response([
                'message' => $exp->getMessage(),
                'status' => 'failed'
            ], 400);
        }
    }
}