Class yii\filters\PageCache

public function behaviors()
{
    return [
        'pageCache' => [
            'class' => 'yii\filters\PageCache',
            'only' => ['index'],
            'duration' => 60,
            'dependency' => [
                'class' => 'yii\caching\DbDependency',
                'sql' => 'SELECT COUNT(*) FROM post',
            ],
            'variations' => [
                \Yii::$app->language,
            ]
        ],
    ];
}

The cache object or the application component ID of the cache object. After the PageCache object is created, if you want to change this property, you should only assign it with a cache object. Starting from version 2.0.2, this can also be a configuration array for creating the object.

A boolean value indicating whether to cache all cookies, or an array of cookie names indicating which cookies can be cached. Be very careful with caching cookies, because it may leak sensitive or private data stored in cookies to unwanted users.

A boolean value indicating whether to cache all HTTP headers, or an array of HTTP header names (case-insensitive) indicating which HTTP headers can be cached. Note if your HTTP headers contain sensitive information, you should white-list which headers can be cached.

The dependency that the cached content depends on. This can be either a yii\caching\Dependency object or a configuration array for creating the dependency object. For example,

[
    'class' => 'yii\caching\DbDependency',
    'sql' => 'SELECT MAX(updated_at) FROM post',
]

would make the output cache depends on the last modified time of all posts. If any post has its modification time changed, the cached content would be invalidated.

Number of seconds that the data can remain valid in cache. Use 0 to indicate that the cached data will never expire.

Whether to enable the page cache. You may use this property to turn on and off the page cache according to specific setting (e.g. enable page cache only for GET requests).

List of factors that would cause the variation of the content being cached. Each factor is a string representing a variation (e.g. the language, a GET parameter). The following variation setting will cause the content to be cached in different versions according to the current application language:

[
    Yii::$app->language,
]

Whether the content being cached should be differentiated according to the route. A route consists of the requested controller ID and action ID. Defaults to true.

The view component to use for caching. If not set, the default application view component yii\web\Application::$view will be used.