application/index/controller/Index.php

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<?php
namespace app\index\controller;

use app\index\model\SystemNavSpace;
class Index extends Base
{
    public function index()
    {
            $systemlist= SystemNavSpace::order('order', 'asc')->select();
         foreach ($systemlist as $value) {
           $value['arr_pic']=explode(",", $value['pic']);
           $systemlist_new[]= $value;
        }
          $arr = array(1, 2, 3, 4, 5);
           $this->assign('arr', $arr); 
        $this->assign('systemlist', $systemlist_new);
        return $this->fetch();
    }
}