Laravel5的Request、Session、Response、中间件

<?php
namespace App\Http\Controllers;
use Illuminate\Support\Facades\DB;
use App\Student;
use Illuminate\Http\Request;
class StudentController extends Controller
{
  public function index(Request $request)
  {
    //1、取值
    echo $request->input('name', 'unknown');
    if ($request->has('name')) {
      echo $request->input('name');
    }
    else {
      echo "string";
    }
    $res = $request->all();
    dd($res);
    //2、判断请求类型:GET、POST
    if ($request->isMethod('GET')) {
      echo "Yes";
    }
    else {
      echo "No";
    }
    $res = $request->ajax();
    var_dump($res);
    //3、判断路由是否符合一定的格式
    $res = $request->is('test2/*');
    $res = $request->url();
    var_dump($res);
  }
}

Route::group(['middleware' => ['web']], function () {
  Route::any('session', ['uses' => 'StudentController@sessionTest']);
});

<?php
namespace App\Http\Controllers;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Session;
use App\Student;
use Illuminate\Http\Request;
class StudentController extends Controller
{
  public function sessionTest(Request $request)
  {
    //1、HTTP request session()
    $request->session()->put('key1', 'value1');
    echo $request->session()->get('key1', 'default');
    //2、辅助函数
    session()->put('key2', 'value2');
    echo session()->get('key2', 'default');
    //3、Session类
    Session::put('key3', 'value3');
    echo Session::get('key3', 'default');
    //以数组形式存储数据
    Session::put(['key4' => 'value4']);
    echo Session::get('key4', 'default');
    //把数据放到Session数组中
    Session::push('student', 'Leroi');
    Session::push('student', 'Li');
    $res = Session::get('student', 'default');
    //取出数据并删除
    $res = Session::pull('student', 'default');
    //取出所有的值
    $res = Session::all();
    var_dump($res);
    //判断session中某个key是否存在
    if (Session::has('key8')) {
      $res = Session::all();
      dd($res);
    }
    else {
      dd('no');
    }
    //删除session中指定的key值
    $res = Session::forget('key1');
    var_dump($res);
    //删除session所有数据
    Session::flush();
    //赞存数据，只能用一次
    Session::flash('key-flash', 'val-flash');
    echo Session::get('key-flash');
    echo Session::get('key-flash');
  }
}

<?php
namespace App\Http\Controllers;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Session;
use Illuminate\Contracts\Routing\ResponseFactory;
use App\Student;
use Illuminate\Http\Request;
class StudentController extends Controller
{
  public function responseTest()
  {
    //响应json //$data = [ //  'errCode' => 0, //  'errMsg' => 'success', //  'data' => 'Leroi', //];
    //return response()->json($data);
    //重定向//并带上数据 //return redirect('sessionTest')->with('message', '我是快闪数据');
    //action() //return redirect()->action('StudentController@sessionTest')->with('message', '我是快闪数据');
    //route...... //返回上一页
    return redirect()->back();
  }