Laravel給生產環境添加監聽事件代碼分享

本文主要和大家介紹了關於Laravel給生產環境添加監聽事件（SQL日誌監聽）的相關資料，文中介紹的非常詳細，對大傢具有一定的參考學習價值，希望能協助到大家。

laravel版本：5.2.*

一、建立監聽器

php artisan make:listener QueryListener --event=Illuminate\\Database\\Events\\QueryExecuted

or

sudo /usr/local/bin/php artisan make:listener QueryListener --event=Illuminate\\Database\\Events\\QueryExecuted

會自動組建檔案 app/Listeners/QueryListener.php

二、註冊事件

開啟 app/Providers/EventServiceProvider.php，在 $listen 中添加 Illuminate\Database\Events\QueryExecuted 事件的監聽器為 QueryListener

protected $listen = [  'Illuminate\Database\Events\QueryExecuted' => [  'App\Listeners\QueryListener', ],];

最終代碼如下

namespace App\Providers;use Illuminate\Contracts\Events\Dispatcher as DispatcherContract;use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;class EventServiceProvider extends ServiceProvider{ /**  * The event listener mappings for the application.  *  * @var array  */ protected $listen = [  'App\Events\SomeEvent' => [   'App\Listeners\EventListener',  ],  'Illuminate\Database\Events\QueryExecuted' => [   'App\Listeners\QueryListener',  ], ]; /**  * Register any other events for your application.  *  * @param \Illuminate\Contracts\Events\Dispatcher $events  * @return void  */ public function boot(DispatcherContract $events) {  parent::boot($events);  // }}

三、添加邏輯

開啟 app/Listeners/QueryListener.php

光有一個空的監聽器是不夠的，我們需要自己實現如何把 $sql 記錄到日誌中。為此，對 QueryListener 進行改造，完善其 handle 方法如下:

$sql = str_replace("?", "'%s'", $event->sql);$log = vsprintf($sql, $event->bindings);Log::info($log);

最終代碼如下

namespace App\Listeners;use Log;use Illuminate\Database\Events\QueryExecuted;use Illuminate\Queue\InteractsWithQueue;use Illuminate\Contracts\Queue\ShouldQueue;class QueryListener{ /**  * Create the event listener.  *  * @return void  */ public function __construct() {  // } /**  * Handle the event.  *  * @param QueryExecuted $event  * @return void  */ public function handle(QueryExecuted $event) {  $sql = str_replace("?", "'%s'", $event->sql);  $log = vsprintf($sql, $event->bindings);  Log::info($log); }}