Save value of a variable in Laravel

Question

I’m starting a project in Laravel, and at the sidebar I have a dropdow with a list on which I access the database and bring information from 3 companies for example, and when I click on one of these companies, I would like to save the id value so that I can use this value to insert into the bank along with an Insert or update in another register, as I could do this?

Controller Method:

public static function emitentes(){
    $users = User::where('id', 1)->with('emitentes')->get()->first();
    $emp_user = $users->emitentes;
    return $emp_user;
}

PHP block requesting information:

             @php

                use App\Http\Controllers\EmitenteController;
                use App\Models\Cliente;

                $empresas = EmitenteController::emitentes();

            @endphp

Dropdow code:

<li class="dropdown notifications-menu">

                <a href="#" class="dropdown-toggle" data-toggle="dropdown">
                    <i class="fa fa-university"></i>
                    <span class="label label-warning">{{count($empresas)}}</span>
                </a>

                <ul class="dropdown-menu">

                    <li class="header">Você pode emitir recibo para {{count($empresas)}} empresas</li>

                    <li>

                        <ul class="menu">

                            @foreach($empresas as $e)
                                <li><!-- start notification -->
                                    <a href="#">
                                    <i class="fa fa-industry text-aqua"></i> {{$e->name}}
                                </a>
                            </li><!-- end notification -->
                            @endforeach

                        </ul>

                    </li>

                </ul>

            </li>

Sample image:

Answer 1

With PHP, an option would be to save the id us cookies using the function setcookie. Example:

setcookie("empresa_id", '15');

To redeem the value of cookie who is saved, just use $_COOKIE. Behold:

echo $_COOKIE["empresa_id"];

Laravel itself has some resources also for this same property. See here in the documentation about Requests & Input.

With Javavascript, it is also possible to do with cookies, but if you prefer you can use localStorage. Take an example:

// Atribui um valor a empresa_id em relação a empresa com valor 15
window.localStorage.setItem('empresa_id', '15');

// Resgata o empresa_id 
var usuario = window.localStorage.getItem('empresa_id');

// Remove o empresa_id 
window.localStorage.removeItem('empresa_id');