AccessControl provides simple access control based on a set of rules.
AccessControl is an action filter. It will check its $rules to find the first rule that matches the current context variables (such as user IP address, user role). The matching rule will dictate whether to allow or deny the access to the requested controller action. If no rule matches, the access will be denied.
To use AccessControl, declare it in the behaviors()
method of your controller class. For example, the following declarations will allow authenticated users to access the "create" and "update" actions and deny all other users from accessing these two actions.
public function behaviors()
{
return [
'access' => [
'class' => \yii\filters\AccessControl::class,
'only' => ['create', 'update'],
'rules' => [
[
'allow' => false,
'verbs' => ['POST']
],
[
'allow' => true,
'roles' => ['@'],
],
],
],
];
}
Property Details
A callback that will be called if the access should be denied to the current user. This is the case when either no rule matches, or a rule with $allow set to false
matches. If not set, denyAccess() will be called.
The signature of the callback should be as follows:
function ($rule, $action)
where $rule
is the rule that denies the user, and $action
is the current action object. $rule
can be null
if access is denied because none of the rules matched.
The default configuration of access rules. Individual rule configurations specified via $rules will take precedence when the same property of the rule is configured.
A list of access rule objects or configuration arrays for creating the rule objects. If a rule is specified via a configuration array, it will be merged with $ruleConfig first before it is used for creating the rule object.
See also $ruleConfig.
The user object representing the authentication status or the ID of the user application component. Starting from version 2.0.2, this can also be a configuration array for creating the object. Starting from version 2.0.12, you can set it to false
to explicitly switch this component support off for the filter.
Defined in: yii\base\BaseObject::__call()
Calls the named method which is not a class method.
Do not call this method directly as it is a PHP magic method that will be implicitly called when an unknown method is being invoked.
public function __call($name, $params)
{
throw new UnknownMethodException('Calling unknown method: ' . get_class($this) . "::$name()");
}
Defined in: yii\base\BaseObject::__construct()
Constructor.
The default implementation does two things:
$config
.If this method is overridden in a child class, it is recommended that
$config
here.Name-value pairs that will be used to initialize the object properties
public function __construct($config = [])
{
if (!empty($config)) {
Yii::configure($this, $config);
}
$this->init();
}
Defined in: yii\base\BaseObject::__get()
Returns the value of an object property.
Do not call this method directly as it is a PHP magic method that will be implicitly called when executing $value = $object->property;
.
See also __set().
public function __get($name)
{
$getter = 'get' . $name;
if (method_exists($this, $getter)) {
return $this->$getter();
} elseif (method_exists($this, 'set' . $name)) {
throw new InvalidCallException('Getting write-only property: ' . get_class($this) . '::' . $name);
}
throw new UnknownPropertyException('Getting unknown property: ' . get_class($this) . '::' . $name);
}
public boolean __isset ( $name ) $name string
The property name or the event name
return booleanWhether the named property is set (not null).
public function __isset($name)
{
$getter = 'get' . $name;
if (method_exists($this, $getter)) {
return $this->$getter() !== null;
}
return false;
}
Defined in: yii\base\BaseObject::__set()
Sets value of an object property.
Do not call this method directly as it is a PHP magic method that will be implicitly called when executing $object->property = $value;
.
See also __get().
public function __set($name, $value)
{
$setter = 'set' . $name;
if (method_exists($this, $setter)) {
$this->$setter($value);
} elseif (method_exists($this, 'get' . $name)) {
throw new InvalidCallException('Setting read-only property: ' . get_class($this) . '::' . $name);
} else {
throw new UnknownPropertyException('Setting unknown property: ' . get_class($this) . '::' . $name);
}
}
Defined in: yii\base\BaseObject::__unset()
Sets an object property to null.
Do not call this method directly as it is a PHP magic method that will be implicitly called when executing unset($object->property)
.
Note that if the property is not defined, this method will do nothing. If the property is read-only, it will throw an exception.
See also https://www.php.net/manual/en/function.unset.php.
public function __unset($name)
{
$setter = 'set' . $name;
if (method_exists($this, $setter)) {
$this->$setter(null);
} elseif (method_exists($this, 'get' . $name)) {
throw new InvalidCallException('Unsetting read-only property: ' . get_class($this) . '::' . $name);
}
}
public mixed afterAction ( $action, $result ) $action yii\base\Action
The action just executed.
$result mixedThe action execution result
return mixedThe processed action result.
public function afterAction($action, $result)
{
return $result;
}
public function afterFilter($event)
{
$event->result = $this->afterAction($event->action, $event->result);
$this->owner->off(Controller::EVENT_AFTER_ACTION, [$this, 'afterFilter']);
}
Defined in: yii\base\ActionFilter::attach()
Attaches the behavior object to the component.
The default implementation will set the $owner property and attach event handlers as declared in events(). Make sure you call the parent implementation if you override this method.
public function attach($owner)
{
$this->owner = $owner;
$owner->on(Controller::EVENT_BEFORE_ACTION, [$this, 'beforeFilter']);
}
This method is invoked right before an action is to be executed (after all possible filters.) You may override this method to do last-minute preparation for the action.
public function beforeAction($action)
{
$user = $this->user;
$request = Yii::$app->getRequest();
foreach ($this->rules as $rule) {
if ($allow = $rule->allows($action, $user, $request)) {
return true;
} elseif ($allow === false) {
if (isset($rule->denyCallback)) {
call_user_func($rule->denyCallback, $rule, $action);
} elseif ($this->denyCallback !== null) {
call_user_func($this->denyCallback, $rule, $action);
} else {
$this->denyAccess($user);
}
return false;
}
}
if ($this->denyCallback !== null) {
call_user_func($this->denyCallback, null, $action);
} else {
$this->denyAccess($user);
}
return false;
}
public function beforeFilter($event)
{
if (!$this->isActive($event->action)) {
return;
}
$event->isValid = $this->beforeAction($event->action);
if ($event->isValid) {
$this->owner->on(Controller::EVENT_AFTER_ACTION, [$this, 'afterFilter'], null, false);
} else {
$event->handled = true;
}
}
Defined in: yii\base\BaseObject::canGetProperty()
Returns a value indicating whether a property can be read.
A property is readable if:
$checkVars
is true);See also canSetProperty().
public function canGetProperty($name, $checkVars = true)
{
return method_exists($this, 'get' . $name) || $checkVars && property_exists($this, $name);
}
Defined in: yii\base\BaseObject::canSetProperty()
Returns a value indicating whether a property can be set.
A property is writable if:
$checkVars
is true);See also canGetProperty().
public boolean canSetProperty ( $name, $checkVars = true ) $name stringThe property name
$checkVars booleanWhether to treat member variables as properties
return booleanWhether the property can be written
public function canSetProperty($name, $checkVars = true)
{
return method_exists($this, 'set' . $name) || $checkVars && property_exists($this, $name);
}
Deprecated since 2.0.14. On PHP >=5.5, use ::class
instead.
public static function className()
{
return get_called_class();
}
Denies the access of the user.
The default implementation will redirect the user to the login page if he is a guest; if the user is already logged, a 403 HTTP exception will be thrown.
protected function denyAccess($user)
{
if ($user !== false && $user->getIsGuest()) {
$user->loginRequired();
} else {
throw new ForbiddenHttpException(Yii::t('yii', 'You are not allowed to perform this action.'));
}
}
Defined in: yii\base\ActionFilter::detach()
Detaches the behavior object from the component.
The default implementation will unset the $owner property and detach event handlers declared in events(). Make sure you call the parent implementation if you override this method.
public function detach()
{
if ($this->owner) {
$this->owner->off(Controller::EVENT_BEFORE_ACTION, [$this, 'beforeFilter']);
$this->owner->off(Controller::EVENT_AFTER_ACTION, [$this, 'afterFilter']);
$this->owner = null;
}
}
Defined in: yii\base\Behavior::events()
Declares event handlers for the $owner's events.
Child classes may override this method to declare what PHP callbacks should be attached to the events of the $owner component.
The callbacks will be attached to the $owner's events when the behavior is attached to the owner; and they will be detached from the events when the behavior is detached from the component.
The callbacks can be any of the following:
'handleClick'
, equivalent to [$this, 'handleClick']
[$object, 'handleClick']
['Page', 'handleClick']
function ($event) { ... }
The following is an example:
[
Model::EVENT_BEFORE_VALIDATE => 'myBeforeValidate',
Model::EVENT_AFTER_VALIDATE => 'myAfterValidate',
]
public array events ( ) return array
Events (array keys) and the corresponding event handler methods (array values).
public function events()
{
return [];
}
protected function getActionId($action)
{
if ($this->owner instanceof Module) {
$mid = $this->owner->getUniqueId();
$id = $action->getUniqueId();
if ($mid !== '' && strpos($id, $mid) === 0) {
$id = substr($id, strlen($mid) + 1);
}
} else {
$id = $action->id;
}
return $id;
}
Defined in: yii\base\BaseObject::hasMethod()
Returns a value indicating whether a method is defined.
The default implementation is a call to php function method_exists()
. You may override this method when you implemented the php magic method __call()
.
public function hasMethod($name)
{
return method_exists($this, $name);
}
Defined in: yii\base\BaseObject::hasProperty()
Returns a value indicating whether a property is defined.
A property is defined if:
$checkVars
is true);See also:
public boolean hasProperty ( $name, $checkVars = true ) $name stringThe property name
$checkVars booleanWhether to treat member variables as properties
return booleanWhether the property is defined
public function hasProperty($name, $checkVars = true)
{
return $this->canGetProperty($name, $checkVars) || $this->canSetProperty($name, false);
}
Initializes the $rules array by instantiating rule objects from configurations.
public function init()
{
parent::init();
if ($this->user !== false) {
$this->user = Instance::ensure($this->user, User::className());
}
foreach ($this->rules as $i => $rule) {
if (is_array($rule)) {
$this->rules[$i] = Yii::createObject(array_merge($this->ruleConfig, $rule));
}
}
}
protected function isActive($action)
{
$id = $this->getActionId($action);
if (empty($this->only)) {
$onlyMatch = true;
} else {
$onlyMatch = false;
foreach ($this->only as $pattern) {
if (StringHelper::matchWildcard($pattern, $id)) {
$onlyMatch = true;
break;
}
}
}
$exceptMatch = false;
foreach ($this->except as $pattern) {
if (StringHelper::matchWildcard($pattern, $id)) {
$exceptMatch = true;
break;
}
}
return !$exceptMatch && $onlyMatch;
}
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