Laravel事件Event
适用场景：记录文章浏览量
| 1 | php artisan make:event 事件名 |
示例：
| 1 | php artisan make:event MyEvent |
Laravel目录\app\Events已经生成MyEvent.php文件
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<?phpnamespace App\Events;use App\Events\Event;use Illuminate\Queue\SerializesModels;use Illuminate\Contracts\Broadcasting\ShouldBroadcast;class MyEvent extends Event{ use SerializesModels; /** * Create a new event instance. * * @return void */ public function __construct() { // } /** * Get the channels the event should be broadcast on. * * @return array */ public function broadcastOn() { return []; }} |
事件必须有监听者，我们先在\app\Providers目录下找到EventServiceProvider.php文件，该文件内有一个Events-Listeners数组来保存事件和监听者的映射关系。
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protected $listen = [ 'App\Events\MyEvent' => [ 'App\Listeners\MyListener1', 'App\Listeners\MyListener2' ]]; |
这里，我们让一个事件有两个监听者，使用artisan控制台自动生成php文件
| 1 | php artisan event:generate |
Laravel\app\Listeners目录下已经生成了MyListener1.php和MyListener2.php
问题来了，我们怎么触发这个事件？
这里借用我们上一篇博客说的Console，来测试这个事件，如果你对Console不熟，可以看http://www.cnblogs.com/sweng/p/6358919.html
对Check类中修改handle()函数，使用Event::fire(new MyEvent())触发事件，实际上是传入一个Event对象
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<?phpnamespace App\Console\Commands;use Illuminate\Console\Command;//use Illuminate\Support\Facades\Event;use App\Events\MyEvent;class Check extends Command{ /** * The name and signature of the console command. * * @var string */ protected $signature = 'check'; /** * The console command description. * * @var string */ protected $description = 'Command description'; /** * Create a new command instance. * * @return void */ public function __construct() { parent::__construct(); } /** * Execute the console command. * * @return mixed */ public function handle() { // echo 'checking...'; Event::fire(new MyEvent()); }} |
