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* @link
* @copyright Copyright (c) 2008 Yii Software LLC
* @license
namespace yii\rbac;
* For more details and usage information on CheckAccessInterface, see the [guide article on security authorization](guide:security-authorization).
* @author Sam Mousa <>
* @since 2.0.9
interface CheckAccessInterface
* Checks if the user has the specified permission.
* @param string|int $userId the user ID. This should be either an integer or a string representing
* the unique identifier of a user. See [[\yii\web\User::id]].
* @param string $permissionName the name of the permission to be checked against
* @param array $params name-value pairs that will be passed to the rules associated
* with the roles and permissions assigned to the user.
* @return bool whether the user has the specified permission.
* @throws \yii\base\InvalidParamException if $permissionName does not refer to an existing permission
public function checkAccess($userId, $permissionName, $params = []);
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