qwl_config/app/Http/Controllers/IndexController.php

<?php
namespace App\Http\Controllers;


class IndexController extends Controller
{
    public function getH5config(){
        $referer = request()->headers->get('referer');
        $url = 'http://test.qingweilai888.xyz';
        $referer = str_replace('https://','',$referer);
        $referer = str_replace('http://','',$referer);
        $referer = trim($referer,"/");
        if($referer == 'testwap.qinglakeji.com'){
           $url = 'http://test.qingweilai888.xyz'; 
        }
        if($referer == 'wap.qwljk.com'){
           $url = 'http://qwlapi.qwljk.com'; 
        }
        echo json_encode(['url'=>$url]);
    }
   
}