Set a session in laravel blade

You can like this

<?php
session(['key' => 'value']);
?>

but It is not recommended to do that inside blade templates, blade’s purpose is to render the view.

You can just add this code in app.blade.php or your main page

   @if ($message = Session::get('error'))
    <div class="alert alert-success">
        <p>{{ $message }}</p>
    </div>
     @endif

@TOMOPONGRAC - Please can you tell me how can I send this session in controller?

In controller which render your blade file put this code ... for example

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

class UserController extends Controller
{
    /**
     * Show the profile for the given user.
     *
     * @param  Request  $request
     * @param  int  $id
     * @return Response
     */
    public function show(Request $request, $id)
    {
        $value = $request->session()->put('key', 'value');

        //
    }
}

For more explanation check the documentation https://laravel.com/docs/5.7/session#storing-data

@TOMOPONGRAC - no i meant, the session that I created in blade, how can I use it in controller? Should I pass in route ? That it the thing I don't get.

I have this situation. User has to make a booking. If the user is not logged in I have to set a session with the $event->id. Then after he logs in should be redirected to booking form blade.

But I have no idea how to send this session in LoginController... :/

Just call it the same way you would.

You don't have to send it through your route.

It would already be available in the controller once you set it in the blade file.

In your controller, call this with the key you gave it in the blade file.

Session::get($key);

In your LoginController try to add this method

    protected function authenticated(Request $request, $user)
    {
        if ($request->session()->has('key')) {
        $sessionData = $request->session()->get('key');
            return redirect()->route('your route');
        }

        return redirect($this->redirectTo);
    }

@TOMOPONGRAC - Thanks a lot! This helped mee :)

@TOMOPONGRAC - I need your help again! I am doing the same thing in RegisterController but it doesn't redirect? What can i do ?

In RegisterController create registered method

    /**
     * The user has been registered.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  mixed  $user
     * @return mixed
     */
    protected function registered(Request $request, $user)
    {
        if ($request->session()->has('key')) {
        $sessionData = $request->session()->get('key');
            return redirect()->route('your route');
        }

        return redirect($this->redirectTo);
    }

@TOMOPONGRAC - Thank you again! You made my day!