laravel 5.5中的电子邮件通知我收到此错误`“试图访问类型为null的值的数组偏移量”

问题描述

我希望在每次注册新用户后都收到电子邮件通知，但是在创建PHP artisan make:notification Taskcompleted并在我的控制台中添加Notification::route('mail','[e-mail]')->notify(new TaskCompleted());之后

public function store(Request $request){
        $employee = request()->validate([
            'employee_id' => 'required|max:250','name' => 'required|max:100','place_of_birth' => 'nullable|max:100',]);
Notification::route('mail','[e-mail]')->notify(new TaskCompleted());

我一直收到此错误 Trying to access array offset on value of type null我已经导入了必要的类，并使用mailtrap配置了.env文件，仍然出现相同的错误

任务完成的文件

<?PHP

namespace App\Notifications;

use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Notifications\Messages\MailMessage;

class TaskCompleted extends Notification
{
    use Queueable;

    /**
     * Create a new notification instance.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Get the notification's delivery channels.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function via($notifiable)
    {
        return ['mail'];
    }

    /**
     * Get the mail representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return \Illuminate\Notifications\Messages\MailMessage
     */
    public function toMail($notifiable)
    {
        return (new MailMessage)
                    ->line('The introduction to the notification.')
                    ->action('Notification Action',url('/'))
                    ->line('Thank you for using our application!');
    }

    /**
     * Get the array representation of the notification.
     *
     * @param  mixed  $notifiable
     * @return array
     */
    public function toArray($notifiable)
    {
        return [
            //
        ];
    }
}

解决方法

好的，我得到了我在laravel 5.5上使用PHP 7.4的解决方案，所以我现在将其降级到PHP 7.2可以正常工作