簡介

• 針對於 lumen，具體版本如下：
  Laravel Framework Lumen (5.7.3) (Laravel Components 5.7.*)

實際操作（記錄 sql 以及執行時間）

註冊對映關係

• EventServiceProvider中註冊事件與監聽器之間的對映關係：

        'App\Events\SqlRecorded' => [
            'App\Listeners\RecordSqlNotification',
        ],

開啟事件服務

• lumen 預設不開啟，在 bootstrap/app.php
  檔案中註冊

 $app->register(App\Providers\EventServiceProvider::class);

建立事件 event

• 檔案 app/Events/SqlRecorded.php

<?php

namespace App\Events;

use Illuminate\Support\Facades\DB;

class SqlRecorded extends Event
{
    /**
     * Create a new event instance.
     *
     * @return void
     */
 

    public function __construct()
    {
        DB::connection()->enableQueryLog();
    }

    public function broadcastOn()
    {
        return [];
    }
}

建立監聽 listen

• 檔案 app/Listeners/RecordSqlNotification.php

<?php

namespace App\Listeners;

use App\Events\SqlRecorded;
use Illuminate\
 
Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Support\Facades\DB;

class RecordSqlNotification
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Handle the event.
     *
     * @param  SqlRecorded $event
     * @return void
     */
    public function handle(SqlRecorded $event)
    {
        $path = storage_path('logs') . DIRECTORY_SEPARATOR . 'sql-' . date('Y-m-d') . '.log';
        $queries = $this->refactor();
        file_put_contents($path, json_encode($queries) . "\n", FILE_APPEND);
    }

    public function refactor()
    {
        $queries = DB::getQueryLog();
        foreach ($queries as &$query) {
            $bindings = count($query['bindings']);
            if ($bindings > 0) {
                $search = array_fill(0, $bindings, '?');
                $sql = str_replace($search, $query['bindings'], $query['query']);
                $query['query'] = $sql;
            }
            $query = [
                'query' => $query['query'],
                'time' => $query['time']
            ];
        }
        return $queries;
    }
}

訪問控制器

    public function event()
    {
        $event = new SqlRecorded();
        $res = (new User())->where('username', 'Jerry')->where('gender', 1)->get();
        /*分發事件，此時事件將被監聽，以下兩種方式都可以實現*/
        event($event);
        //event::fire($event);
    }

結束

• 註冊路由後即可訪問控制方法，並將sql存入指定檔案。