<?php
namespace frontend\controllers;
use Yii;
use yii\web\Controller;
class UserController extends Controller
{
  public function actionIndex()
  {
    $data=[
      'name'=>'cyg',
      'age'=>7,
    ];
    p($data);
    print_r($data);
  }
}

<?php
function p($val)
{
  print_r($var);
}

require(__DIR__ . '/../helper/function.php');