php/www/protected/modules/o2o/controllers/TestController.php

<?php
/**
 * Created by PhpStorm.
 * User: north
 * Date: 2017/9/9
 * Time: 下午5:33
 */
class TestController extends O2oBaseController {
    public function actionTest() {
        $code = urldecode(Yii::app()->request->getParam('code'));
        $file = fopen('a.txt','a') or die('创建失败');
        if (intval($code) == 0) {

            $txt = urldecode(Yii::app()->request->getParam('text'));
            $txt .= urldecode(Yii::app()->request->getParam('message'));
            fwrite($file,$txt);
        } else {
            $txt = urldecode(Yii::app()->request->getParam('message'));
            fwrite($file,$txt);
        }
        fclose($file);
        echo '{
            "code" : 0,
            "message" : "成功"
            }';
    }
}