diff --git a/framework/yii/rbac/DbManager.php b/framework/yii/rbac/DbManager.php
index 5bbc7ab..e9e1730 100644
--- a/framework/yii/rbac/DbManager.php
+++ b/framework/yii/rbac/DbManager.php
@@ -277,6 +277,18 @@ class DbManager extends Manager
 	}
 
 	/**
+	 * Revokes all authorization assignments from a user.
+	 * @param mixed $userId the user ID (see [[User::id]])
+	 * @return boolean whether removal is successful
+	 */
+	public function revokeAll($userId)
+	{
+		return $this->db->createCommand()
+						->delete($this->assignmentTable, ['user_id' => $userId])
+						->execute() > 0;
+	}
+
+	/**
 	 * Returns a value indicating whether the item has been assigned to the user.
 	 * @param mixed $userId the user ID (see [[User::id]])
 	 * @param string $itemName the item name
diff --git a/framework/yii/rbac/Manager.php b/framework/yii/rbac/Manager.php
index 1710a77..a1bf47a 100644
--- a/framework/yii/rbac/Manager.php
+++ b/framework/yii/rbac/Manager.php
@@ -269,6 +269,12 @@ abstract class Manager extends Component
 	 */
 	abstract public function revoke($userId, $itemName);
 	/**
+	 * Revokes all authorization assignments from a user.
+	 * @param mixed $userId the user ID (see [[User::id]])
+	 * @return boolean whether removal is successful
+	 */
+	abstract public function revokeAll($userId);
+	/**
 	 * Returns a value indicating whether the item has been assigned to the user.
 	 * @param mixed $userId the user ID (see [[User::id]])
 	 * @param string $itemName the item name
diff --git a/framework/yii/rbac/PhpManager.php b/framework/yii/rbac/PhpManager.php
index 57ede09..78e4d8c 100644
--- a/framework/yii/rbac/PhpManager.php
+++ b/framework/yii/rbac/PhpManager.php
@@ -221,6 +221,22 @@ class PhpManager extends Manager
 	}
 
 	/**
+	 * Revokes all authorization assignments from a user.
+	 * @param mixed $userId the user ID (see [[User::id]])
+	 * @return boolean whether removal is successful
+	 */
+	public function revokeAll($userId)
+	{
+		if (isset($this->_assignments[$userId]) && is_array($this->_assignments[$userId])) {
+			foreach ($this->_assignments[$userId] as $itemName => $value)
+				unset($this->_assignments[$userId][$itemName]);
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	/**
 	 * Returns a value indicating whether the item has been assigned to the user.
 	 * @param mixed $userId the user ID (see [[User::id]])
 	 * @param string $itemName the item name
diff --git a/tests/unit/framework/rbac/ManagerTestCase.php b/tests/unit/framework/rbac/ManagerTestCase.php
index 3bf80ad..cbf8de8 100644
--- a/tests/unit/framework/rbac/ManagerTestCase.php
+++ b/tests/unit/framework/rbac/ManagerTestCase.php
@@ -119,6 +119,12 @@ abstract class ManagerTestCase extends TestCase
 		$this->assertFalse($this->auth->revoke('author B', 'author'));
 	}
 
+	public function testRevokeAll()
+	{
+		$this->assertTrue($this->auth->revokeAll('reader E'));
+		$this->assertFalse($this->auth->isAssigned('reader E', 'reader'));
+	}
+
 	public function testGetAssignments()
 	{
 		$this->auth->assign('author B', 'deletePost');
@@ -201,6 +207,13 @@ abstract class ManagerTestCase extends TestCase
 				'updateOwnPost' => false,
 				'deletePost' => true,
 			],
+			'reader E' => [
+				'createPost' => false,
+				'readPost' => false,
+				'updatePost' => false,
+				'updateOwnPost' => false,
+				'deletePost' => false,
+			],
 		];
 
 		$params = ['authorID' => 'author B'];
@@ -245,5 +258,6 @@ abstract class ManagerTestCase extends TestCase
 		$this->auth->assign('author B', 'author');
 		$this->auth->assign('editor C', 'editor');
 		$this->auth->assign('admin D', 'admin');
+		$this->auth->assign('reader E', 'reader');
 	}
 }