tp5 session_id 跨域

<?php
namespace app\appApi\controller;
header('Access-Control-Allow-Origin: *');
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept");
header('Access-Control-Allow-Methods: GET, POST, PUT');
use think\Controller;
use think\Request;
use think\Session;
use app\admin\controller\CommPublic;

class Index extends Controller
{

    public function __construct(Request $request)
    {
        parent::__construct($request);

//    关闭session_star
        Session::init([
                'prefix'         => 'module',
                'type'           => '',
                'auto_start'     => false,//先关闭session
        ]);

       if (input('sid')) {
        //登录时发送session_id给前端然后再让前端发送过来

        session_id(input('sid'));

        }
    session_start();
    //下面正常使用session('user_id');就可以的到user_id的值了

     }
}