session()->flash()方法存入一条缓存的数据，让它只在下一次的请求内有效。常用于重定向后显示提示信息。
$user = User::create([ 'name' => $request->name, 'email' => $request->email, 'password' => bcrypt($request->password), ]); session()->flash('success', '您已注册成功！'); return redirect()->route('users.show', [$user]);
设置一个公用视图，使其显示缓存信息。
resources/views/shared/_messages.blade.php
@foreach (['danger', 'warning', 'success', 'info'] as $msg) @if(session()->has($msg)) <div class="flash-message"> <p class="alert alert-{{ $msg }}"> {{ session()->get($msg) }} </p> </div> @endif @endforeach
将消息提醒公用视图嵌入主通用视图
resources/views/layouts/default.blade.php
<body> @include('layouts._header') <div class="container"> <div class="offset-md-1 col-md-10"> @include('shared._messages') @yield('content') @include('layouts._footer') </div> </div> </body>