| protected validateCache ( integer $lastModified, string $etag ) : boolean | ||
| $lastModified | integer | the calculated Last-Modified value in terms of a UNIX timestamp. If null, the Last-Modified header will not be validated. |
| $etag | string | the calculated ETag value. If null, the ETag header will not be validated. |
| Результат | boolean | whether the HTTP cache is still valid. |
protected function validateCache($lastModified, $etag)
{
if (isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
// HTTP_IF_NONE_MATCH takes precedence over HTTP_IF_MODIFIED_SINCE
// http://tools.ietf.org/html/rfc7232#section-3.3
return $etag !== null && in_array($etag, Yii::$app->request->getETags(), true);
} elseif (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
return $lastModified !== null && @strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $lastModified;
} else {
return false;
}
}