View与Controller的连接

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从View向Controller传值

<html><body><form action="{{url('/R_construct')}}" method="get">/*对应get方法，R_Controller路由*/    你的链表<br/>     <input type="text" name="list">//要传到Controller里的变量名为list     <input type="submit" value="Submit"></form></body></html> public function R_construct(Request $request){    $str = $request->input('list');//从View中接受list变量并存入$str    $list = explode(" ", $str);    $size = count($list);    for($i = 1; $i <= $size; $i++)    {        DB::table('LinkedList')            ->insert(                ['id' => $i, 'name' => $list[$i-1]]            );    }   return view('construct_success');//返回construct_success.blade.php页面}

Controller向View传值

传参数

public function size(){    $count = DB::table('LinkedList')        ->count();    return view('size_success', ['size' => $count]);/*将$count的值存入size传到size_success.blade.php*/}<html><body><h1>链表长度为{{$size}}</h1><br>//用{{$size}}接收参数<div class="links"><a href={{ url('/') }}>首页</a></div></body></html>

传数据库值或传类

public function print_list(){    $print = DB::table('LinkedList')->get();    return view('print_success', ['print' => $print]);}<html><body><h1>链表为</h1>@forelse($print as $prints)//用forelse或foreach等方法便历    <h3>{{$prints->name}}</h3>@empty    <h3>空</h3>@endforelse  <div class="links">     <a href={{ url('/') }}>首页</a>  </div></body></html>

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