How to pass custom variables in Laravel notifications?

[DhPandya]

I'm using Laravel notifications to send email notification now I've to change the logo of the header dynamically so I need to pass variable from the notification class.

I see many blogs suggesting with() but it also not working. Am I missing here? Could someone please guide?

I'm using the default header file which I get by publishing the vendor:publish resources\views\vendor\mail\html\header.blade.php

SendInvoiceToCustomerNotification.php

<?php

namespace App\Notifications;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;
use Illuminate\Notifications\Notification;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\HtmlString;

class SendInvoiceToCustomerNotification extends Notification implements ShouldQueue
{
    use Queueable;

    public $emailContent, $pdf,$invoice;
    /**
     * Create a new notification instance.
     */
    public function __construct($emailContent, $pdf,$invoice)
    {
        $this->emailContent = $emailContent;
        $this->pdf = base64_encode($pdf);
        $this->invoice = $invoice;
    }

    /**
     * Get the notification's delivery channels.
     *
     * @return array<int, string>
     */
    public function via(object $notifiable): array
    {
        return ['mail'];
    }

    /**
     * Get the mail representation of the notification.
     */
    public function toMail(object $notifiable): MailMessage
    {
        //Config::set('app.application_logo', getEmailTemplateLogo($this->invoice->business));        
        return (new MailMessage)
            ->subject($this->emailContent['subject'])
            ->line(new HtmlString($this->emailContent['email_body']))
            ->action('Pay Invoice', url('/'))
            ->line('Thank you for using our application!')
            ->attachData(base64_decode($this->pdf), 'invoice.pdf', [
                'mime' => 'application/pdf',
            ])
            ->with([
                'logo' => getEmailTemplateLogo($this->invoice->business)
            ]);
    }

    /**
     * Get the array representation of the notification.
     *
     * @return array<string, mixed>
     */
    public function toArray(object $notifiable): array
    {
        return [
            //
        ];
    }
}

message.blade.php

<x-mail::layout>
{{-- Header --}}
<x-slot:header>
<x-mail::header :url="config('app.url')" :logo="$logo ?? Vite::asset('resources/images/logo.svg')">
{{ config('app.name') }}
</x-mail::header>
</x-slot:header>

{{-- Body --}}
{{ $slot }}

{{-- Subcopy --}}
@isset($subcopy)
<x-slot:subcopy>
<x-mail::subcopy>
{{ $subcopy }}
</x-mail::subcopy>
</x-slot:subcopy>
@endisset

{{-- Footer --}}
<x-slot:footer>
<x-mail::footer>
© {{ date('Y') }} {{ config('app.name') }}. {{ __('All rights reserved.') }}
</x-mail::footer>
</x-slot:footer>
</x-mail::layout>

header.blade.php

@props(['url', 'logo'])
{{-- @dd($logo) --}}
<tr>
<td class="header">
<a href="{{ $url }}" style="display: inline-block;">
<img src="{{ $logo }}" class="logo" alt="{{ config('app.name') }}" style="width:100px;">
</a>
</td>
</tr>

[DhPandya]

Link for the original discussion

Notification Class

$message = (new MailMessage)
            ->subject($this->emailContent['subject'])
            ->line(new HtmlString($this->emailContent['email_body']))
            ->action('Pay Invoice', url('/'))
            ->line('Thank you for using our application!')
            ->attachData(base64_decode($this->pdf), 'invoice.pdf', [
                'mime' => 'application/pdf',
            ]);
        $message->viewData['logo'] = getEmailTemplateLogo($this->invoice->business);
        return $message;

resources/views/vendor/notifications/email.blade.php
<x-mail::message :logo="$logo">

This works like a charm! No additional views no custom coding, just a single line and it will do all the work for you.