FRONTEND_MVC/modules/manager/controllers/SpyController.php

<?php
namespace manager\controllers;
use  Yii;

class SpyController extends BaseController
{
	const sleep = 60*5;
	const dead = 60*15;
	const kill = 60*25;
	const keylist = 'uactive';

    public function actionIndex()
    {
        return $this->redirect("news/list");
    }

    public function actionView()
    {
		$cache = Yii::$app->memcache;
		$user = Yii::$app->user->identity->profile->name;
		$id = Yii::$app->user->identity->profile->user_id;
		$mduser = $id;
		$uactive = $cache->get(self::keylist);
		$html = '';
		if( $uactive ){
			$uactive = unserialize($uactive);
			$html = $this->renderPartial('_item',['users'=>$uactive, 'obj'=>$this, 'id'=>$id]);
		}else{
			$html = '';
		}
        return $this->render("view", ['html'=>$html]);
    }

    public function actionAuthorping()
    {
		$cache = Yii::$app->memcache;
		$user = Yii::$app->user->identity->profile->name;
		$id = Yii::$app->user->identity->profile->user_id;
		$mduser = $id;
		$uactive = $cache->get(self::keylist);
		$html = '';
		if( $uactive ){
			$uactive = unserialize($uactive);
			$uactive[$mduser] = ['name'=>$user, 'time' => time(), 'id' => $id];
			$cache->set( self::keylist, serialize($uactive), self::dead );
			$a = [];
			foreach($uactive as $userid => $data){
				if(  time()-$data['time'] < self::kill ){
					$a[$userid] = $data;
				}
			}
			$uactive = $a;
			$html = $this->renderPartial('list',['users'=>$uactive, 'obj'=>$this, 'id'=>$id]);
		}else{
			$uactive = [];
			$uactive[$mduser] = ['name'=>$user, 'time' => time(), 'id' => $id];
			$cache->add( self::keylist, serialize($uactive), self::dead );
		}
        return json_encode( ['status'=>'ok', 'html'=>$html,  'count' =>count($uactive)] );
    }

}