中间件的应用

控制器

<?phpnamespace App\Http\Controllers;use Illuminate\Http\Request;class AgeController extends Controller
{//public function index(){return "年龄测试";}
}

路由

// 年龄控制器路由
Route::get("d2/{age}",[AgeController::class,"index"])->middleware(CheckAge::class);
// Route::get("d2/{age}",[AgeController::class,"index"])->middleware(被使用的中间件的名字);
// 中间件重定向的路由
Route::get('d3',function(){return "你输入的年龄 <= 18";
});

创建中间件

<?phpnamespace App\Http\Middleware;use Closure;
use Illuminate\Http\Request;class CheckAge
{/*** Handle an incoming request.** @param  \Illuminate\Http\Request  $request* @param  \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse)  $next* @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse*/public function handle(Request $request, Closure $next){if($request->route('age') > 18){return $next($request);/**  return $next($request);  下一步， 继续向后走，继续* 向后访问控制器、视图、匿名函数等各种资源*/  }else{return redirect('d3');}}
}