Laravel - Notifications - Markdown Attachment Content

If some of your attachment fields contain Markdown, you may use the markdown method to instruct Slack to parse and display the given attachment fields as Markdown formatted text. The values accepted by this method are: pretext, text, and / or fields. For more information about Slack attachment formatting, check out the Slack API documentation:

     * Get the Slack representation of the notification.
     * @param  mixed  $notifiable
     * @return SlackMessage
    public function toSlack($notifiable)
        $url = url('/exceptions/'.$this->exception->id);
        return (new SlackMessage)
                    ->content('Whoops! Something went wrong.')
                    ->attachment(function ($attachment) use ($url) {
                        $attachment->title('Exception: File Not Found', $url)
                                   ->content('File [background.jpg] was *not found*.')