logSystem-advance/frontend/controllers/ApiController.php

<?php
namespace frontend\controllers;

use Yii;
use yii\base\InvalidParamException;
use yii\web\BadRequestHttpException;
use yii\web\Controller;
use yii\filters\VerbFilter;
use yii\filters\AccessControl;
use common\models\LoginForm;
use frontend\models\PasswordResetRequestForm;
use frontend\models\ResetPasswordForm;
use frontend\models\SignupForm;
use frontend\models\ContactForm;

/**
 * Site controller
 */
class ApiController extends Controller
{

    public function behaviors()
    {
        return [
            'verbs' => [
                'class' => VerbFilter::className(),
                'actions' => [
                    'api' => ['get', 'post'],
                    'index' => ['get', 'post'],
                ],
            ],
        ];
    }

    public function actionApi()
    {
        return 'hello world';
    }
    /**
     * Displays contact json交互.
     *
     * @return mixed
     */
    public function actionJson()
    {
        $post=Yii::$app->request->get();
        var_dump($post);
    }

}