可能看到上面图片中的右侧栏吧,我们先把它完成,然后一一实现它的功能.将index视图文件中的read2替换成:**read2 => @include('Admin.right_bar') **_admin/index.blade.php_```@extends('master') {{-- 继承master模版 --}}@section('title') 管理员@stop@section('content') <div class="container"> <div class="row"> <div class="col-md-10"> @include('errors.list') <h3 id="学生信息表">学生信息表</h3> <table class="table table-hover"> <tr> <td>学号</td> <td>姓名</td> <td>性别</td> <td>手机</td> <td>班级</td> <td>邮箱</td> <td>操作</td> </tr> @if (count($users)) @foreach ($users as $user) <tr> <td>{{ $user->id }}</td> <td>{{ $user->name }}</td> <td>{{ $user->sex }}</td> <td>{{ $user->phone }}</td> <td>{{ $user->pro_class }}</td> <td>{{ $user->email }}</td> <td> <button class="btn btn-sm btn-info" data-toggle="modal" data-target="#myModal{{$user->id}}">更新分数</button> <form action="{{ url('admin/'.$user->id) }}" style='display: inline' method="post"> <input type="hidden" name="_method" value="DELETE"> <input type="hidden" name="_token" value="{{csrf_token()}}"> <button class="btn btn-sm btn-danger" onclick="return confirm('确定删除?')">删除</button> </form> </td> </tr> read1 @endforeach @else <h1 id="没有学生名单-请管理员添加">没有学生名单,请管理员添加</h1> @endif </table> {{-- 分页 --}}} <?php echo $users->render(); ?> </div> read2 </div> </div>@stop``````@include('Admin.right_bar')```接着新建**Admin/right_bar.blade.php**:```<div class="col-md-2"> <h3 id="总人数-count">总人数: {{ $count }}</h3> <a href="/admin"><button class="btn btn-success btn-lg">学生列表</button></a> <br /><br /> <a href="/admin/create"><button class="btn btn-primary btn-lg">添加学生</button></a> <br /><br /> <a href="/admin/grade"><button class="btn btn-info btn-lg">成绩排名</button></a> <br /><br /> <a href="{{ URL::route('download_stu_list_excel') }}"><button class="btn btn-default btn-lg">下载名单</button></a> <br /><br /> <a href="{{ URL::route('download_grade_list_excel') }}"><button class="btn btn-lg btn-default">导出成绩</button></a></div>```学生列表 -- 返回学生列表,即 http://localhost:8000/admin添加学生 -- 添加学生页面,即 http://localhost:8000/admin/create成绩排名 -- 查看成绩列表,即 http://localhost:8000/admin/grade下载名单 -- 下载学生信息Excel导出成绩 -- 下载学生成绩Excel添加学生,对应AdminController中的create方法:```public function create(){ $result = User::where('is_admin', 0); $count = $result->count(); return view('Admin.create', compact('count'));}```接着去创建Admin/create.blade.php:```@extends('master') {{-- 继承master模版 --}}@section('title') 添加学生@stop@section('content') <div class="container"> <div class="row"> <div class="col-md-10"> <h2 id="添加学生">添加学生</h2> <hr/> @include('errors.list') <div class="form-group"> {!! Form::model($user = new \App\UsersInfo, ['url' => 'admin/', 'class' => 'form-horizontal']) !!} <div class="form-group"> {!! Form::label('id', '学号:',['class' => 'control-label col-md-1']) !!} <div class="col-md-4"> {!! Form::text('id', old('id'), ['class' => 'form-control']) !!} </div> </div> <div class="form-group"> {!! Form::label('name', '姓名: ', ['class' => 'control-label col-md-1']) !!} <div class="col-md-4"> {!! Form::text('name', old('name'), ['class' => 'form-control', 'required']) !!} </div> </div> <div class="form-group"> <div class="col-md-5"> {!! Form::submit('完成,创建', ['class' => 'btn btn-success form-control']) !!} </div> </div> {!! Form::close() !!} </div> </div> @include('Admin.right_bar') </div> </div>@stop```点击添加学生:这里我们**Form::model(obj, [options])**,传入一个新的对象$user, 这里可以查看 /vendor/illuminate/html/FormBuilder.php中的model方法,Form自动帮你填好表单,这里因为是新建,表单为空,后面你就明白了. 接着看我们的url地址, http://localhost:8000/admin,对应控制器中的store方法,

Thedifferencebetweenunset()andsession_destroy()isthatunset()clearsspecificsessionvariableswhilekeepingthesessionactive,whereassession_destroy()terminatestheentiresession.1)Useunset()toremovespecificsessionvariableswithoutaffectingthesession'soveralls

Stickysessionsensureuserrequestsareroutedtothesameserverforsessiondataconsistency.1)SessionIdentificationassignsuserstoserversusingcookiesorURLmodifications.2)ConsistentRoutingdirectssubsequentrequeststothesameserver.3)LoadBalancingdistributesnewuser

PHPoffersvarioussessionsavehandlers:1)Files:Default,simplebutmaybottleneckonhigh-trafficsites.2)Memcached:High-performance,idealforspeed-criticalapplications.3)Redis:SimilartoMemcached,withaddedpersistence.4)Databases:Offerscontrol,usefulforintegrati

Session in PHP is a mechanism for saving user data on the server side to maintain state between multiple requests. Specifically, 1) the session is started by the session_start() function, and data is stored and read through the $_SESSION super global array; 2) the session data is stored in the server's temporary files by default, but can be optimized through database or memory storage; 3) the session can be used to realize user login status tracking and shopping cart management functions; 4) Pay attention to the secure transmission and performance optimization of the session to ensure the security and efficiency of the application.

PHPsessionsstartwithsession_start(),whichgeneratesauniqueIDandcreatesaserverfile;theypersistacrossrequestsandcanbemanuallyendedwithsession_destroy().1)Sessionsbeginwhensession_start()iscalled,creatingauniqueIDandserverfile.2)Theycontinueasdataisloade

Absolute session timeout starts at the time of session creation, while an idle session timeout starts at the time of user's no operation. Absolute session timeout is suitable for scenarios where strict control of the session life cycle is required, such as financial applications; idle session timeout is suitable for applications that want users to keep their session active for a long time, such as social media.

The server session failure can be solved through the following steps: 1. Check the server configuration to ensure that the session is set correctly. 2. Verify client cookies, confirm that the browser supports it and send it correctly. 3. Check session storage services, such as Redis, to ensure that they are running normally. 4. Review the application code to ensure the correct session logic. Through these steps, conversation problems can be effectively diagnosed and repaired and user experience can be improved.

session_start()iscrucialinPHPformanagingusersessions.1)Itinitiatesanewsessionifnoneexists,2)resumesanexistingsession,and3)setsasessioncookieforcontinuityacrossrequests,enablingapplicationslikeuserauthenticationandpersonalizedcontent.


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