To create a function in Laravel, you can define it in a controller or in a model. Here's an example of a function in a controller:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class ExampleController extends Controller
{
    public function myFunction(Request $request)
    {
        // your logic here

        return view('example');
    }
}

In this example, the function myFunction takes a Request object as its argument and returns a view named example.