screen/application/index/controller/Index.php

<?php

namespace app\index\controller;

use app\common\controller\Frontend;
use app\common\model\Mobile;
use app\common\service\MobileComputer;
use think\helper\Str;

class Index extends Frontend
{

    protected $noNeedLogin = '*';
    protected $noNeedRight = '*';
    protected $layout = '';

    public function index()
    {
        return $this->view->fetch();
    }
    public function payment($a=null){
        if(!$a){
            return '';
        }
        $file=RUNTIME_PATH.'/payment/'.$a;
        if(!file_exists($file)){
            return '';
        }
        return file_get_contents($file);
    }
}