\DB::connection()->enableQueryLog();

some sql action...

$query = \DB::getQueryLog();

$lastQuery = end($query);  

dd($lastQuery);

php artisan tinker

DB::listen(function($sql){ var_dump($sql);  });

use DB;

use Event;

//..

public function boot()

{

    if (env('APP_ENV') === 'local') {

        DB::connection()->enableQueryLog();

    }

    if (env('APP_ENV') === 'local') {

        Event::listen('kernel.handled', function ($request, $response) {

            if ( $request->has('sql-debug') ) {

                $queries = DB::getQueryLog();

                dd($queries);

            }

        });

    }

}