ldc-mesbr-app/app/Mail/AlertBr.php

<?php

namespace App\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

class AlertBr extends Mailable
{
    use Queueable;
    use SerializesModels;

    public $couponSeuil;

    public $couponDiffusion;

    public $subject;


    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct($couponSeuil, $couponDiffusion, $sitename)
    {
        $this->couponSeuil     = $couponSeuil;
        $this->couponDiffusion = $couponDiffusion;
        $this->subject         = 'Notification mes BR : ' . $sitename;
    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
        return $this->subject($this->subject)->view('mail.alert')->with(['couponSeuil' => $this->couponSeuil, 'couponDiffusion' => $this->couponDiffusion]);
    }
}