Yii 2.0如何使用页面缓存方法示例

674_11161@;"> 674_11161@

namespace common\lib;

use Yii;
use yii\caching\Cache;
use yii\di\Instance;
use yii\web\Response;
use yii\filters\PageCache as PCache;

/**

• 重写页面缓存，增加varByParam参数一列
  */
  class PageCache extends PCache
  {
  /**
• 参数设置，默认无参数
• 用法：'varByParam' => Yii::$app->request->get('id')
• @var String
  */
  public $varByParam = '';

public function beforeAction($action)
{
if (!$this->enabled) {
return true;
}

$this->cache = Instance::ensure($this->cache,Cache::className());

if (is_array($this->dependency)) {
$this->dependency = Yii::createObject($this->dependency);
}

$properties = [];
foreach (['cache','duration','dependency','variations'] as $Name) {
$properties[$name] = $this->$name;
}
$id = $this->varyByRoute ? $action->getUniquEID().$this->varByParam : CLASS;
$response = Yii::$app->getResponse();
ob_start();
ob_implicit_flush(false);
if ($this->view->beginCache($id,$properties)) {
$response->on(Response::EVENT_AFTER_SEND,[$this,'cacheResponse']);
return true;
} else {
$data = $this->cache->get($this->calculateCacheKey());
if (is_array($data)) {
$this->restoreResponse($response,$data);
}
$response->content = ob_get_clean();
return false;
}
}
}
?>

'common\lib\PageCache','only' => ['view'],'duration' => 0,//永不过期 'varByParam' => Yii::$app->request->get('id'),],