diff --git a/framework/base/ArrayAccessTrait.php b/framework/base/ArrayAccessTrait.php
index df1ab603fd..43a229ab8b 100644
--- a/framework/base/ArrayAccessTrait.php
+++ b/framework/base/ArrayAccessTrait.php
@@ -22,7 +22,7 @@ trait ArrayAccessTrait
 {
     /**
      * Returns an iterator for traversing the data.
-     * This method is required by the SPL interface `IteratorAggregate`.
+     * This method is required by the SPL interface [[\IteratorAggregate]].
      * It will be implicitly called when you use `foreach` to traverse the collection.
      * @return \ArrayIterator an iterator for traversing the cookies in the collection.
      */
@@ -42,7 +42,7 @@ trait ArrayAccessTrait
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param mixed $offset the offset to check on
      * @return boolean
      */
@@ -52,7 +52,7 @@ trait ArrayAccessTrait
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param integer $offset the offset to retrieve element.
      * @return mixed the element at the offset, null if no element is found at the offset
      */
@@ -62,7 +62,7 @@ trait ArrayAccessTrait
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param integer $offset the offset to set element
      * @param mixed $item the element value
      */
@@ -72,7 +72,7 @@ trait ArrayAccessTrait
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param mixed $offset the offset to unset element
      */
     public function offsetUnset($offset)
diff --git a/framework/base/Model.php b/framework/base/Model.php
index 7c1f06f350..bfeb649123 100644
--- a/framework/base/Model.php
+++ b/framework/base/Model.php
@@ -925,7 +925,7 @@ class Model extends Component implements IteratorAggregate, ArrayAccess, Arrayab
 
     /**
      * Returns an iterator for traversing the attributes in the model.
-     * This method is required by the interface IteratorAggregate.
+     * This method is required by the interface [[\IteratorAggregate]].
      * @return ArrayIterator an iterator for traversing the items in the list.
      */
     public function getIterator()
@@ -936,7 +936,7 @@ class Model extends Component implements IteratorAggregate, ArrayAccess, Arrayab
 
     /**
      * Returns whether there is an element at the specified offset.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `isset($model[$offset])`.
      * @param mixed $offset the offset to check on
      * @return boolean
@@ -948,7 +948,7 @@ class Model extends Component implements IteratorAggregate, ArrayAccess, Arrayab
 
     /**
      * Returns the element at the specified offset.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `$value = $model[$offset];`.
      * @param mixed $offset the offset to retrieve element.
      * @return mixed the element at the offset, null if no element is found at the offset
@@ -960,7 +960,7 @@ class Model extends Component implements IteratorAggregate, ArrayAccess, Arrayab
 
     /**
      * Sets the element at the specified offset.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `$model[$offset] = $item;`.
      * @param integer $offset the offset to set element
      * @param mixed $item the element value
@@ -972,7 +972,7 @@ class Model extends Component implements IteratorAggregate, ArrayAccess, Arrayab
 
     /**
      * Sets the element value at the specified offset to null.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `unset($model[$offset])`.
      * @param mixed $offset the offset to unset element
      */
diff --git a/framework/caching/Cache.php b/framework/caching/Cache.php
index dce5ccc9ff..68e11e8612 100644
--- a/framework/caching/Cache.php
+++ b/framework/caching/Cache.php
@@ -30,7 +30,7 @@ use yii\helpers\StringHelper;
  * }
  * ```
  *
- * Because Cache implements the ArrayAccess interface, it can be used like an array. For example,
+ * Because Cache implements the [[\ArrayAccess]] interface, it can be used like an array. For example,
  *
  * ```php
  * $cache['foo'] = 'some data';
@@ -423,7 +423,7 @@ abstract class Cache extends Component implements \ArrayAccess
 
     /**
      * Returns whether there is a cache entry with a specified key.
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param string $key a key identifying the cached value
      * @return boolean
      */
@@ -434,7 +434,7 @@ abstract class Cache extends Component implements \ArrayAccess
 
     /**
      * Retrieves the value from cache with a specified key.
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param string $key a key identifying the cached value
      * @return mixed the value stored in cache, false if the value is not in the cache or expired.
      */
@@ -447,7 +447,7 @@ abstract class Cache extends Component implements \ArrayAccess
      * Stores the value identified by a key into cache.
      * If the cache already contains such a key, the existing value will be
      * replaced with the new ones. To add expiration and dependencies, use the [[set()]] method.
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param string $key the key identifying the value to be cached
      * @param mixed $value the value to be cached
      */
@@ -458,7 +458,7 @@ abstract class Cache extends Component implements \ArrayAccess
 
     /**
      * Deletes the value with the specified key from cache
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param string $key the key of the value to be deleted
      */
     public function offsetUnset($key)
diff --git a/framework/db/BaseActiveRecord.php b/framework/db/BaseActiveRecord.php
index fa90537ee1..2008d661e9 100644
--- a/framework/db/BaseActiveRecord.php
+++ b/framework/db/BaseActiveRecord.php
@@ -1092,7 +1092,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
 
     /**
      * Returns whether there is an element at the specified offset.
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param mixed $offset the offset to check on
      * @return boolean whether there is an element at the specified offset.
      */
@@ -1160,11 +1160,11 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
      *
      * Note that this method requires that the primary key value is not null.
      *
-     * @param string $name the case sensitive name of the relationship
+     * @param string $name the case sensitive name of the relationship.
      * @param ActiveRecordInterface $model the model to be linked with the current one.
      * @param array $extraColumns additional column values to be saved into the junction table.
      * This parameter is only meaningful for a relationship involving a junction table
-     * (i.e., a relation set with [[ActiveRelationTrait::via()]] or `[[ActiveQuery::viaTable()]]`.)
+     * (i.e., a relation set with [[ActiveRelationTrait::via()]] or [[ActiveQuery::viaTable()]].)
      * @throws InvalidCallException if the method is unable to link two models.
      */
     public function link($name, $model, $extraColumns = [])
@@ -1557,7 +1557,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
 
     /**
      * Sets the element value at the specified offset to null.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `unset($model[$offset])`.
      * @param mixed $offset the offset to unset element
      */
diff --git a/framework/db/BatchQueryResult.php b/framework/db/BatchQueryResult.php
index f1583839c7..e2f679f954 100644
--- a/framework/db/BatchQueryResult.php
+++ b/framework/db/BatchQueryResult.php
@@ -13,7 +13,7 @@ use yii\base\Object;
  * BatchQueryResult represents a batch query from which you can retrieve data in batches.
  *
  * You usually do not instantiate BatchQueryResult directly. Instead, you obtain it by
- * calling [[Query::batch()]] or [[Query::each()]]. Because BatchQueryResult implements the `Iterator` interface,
+ * calling [[Query::batch()]] or [[Query::each()]]. Because BatchQueryResult implements the [[\Iterator]] interface,
  * you can iterate it to obtain a batch of data in each iteration. For example,
  *
  * ```php
@@ -94,7 +94,7 @@ class BatchQueryResult extends Object implements \Iterator
 
     /**
      * Resets the iterator to the initial state.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      */
     public function rewind()
     {
@@ -104,7 +104,7 @@ class BatchQueryResult extends Object implements \Iterator
 
     /**
      * Moves the internal pointer to the next dataset.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      */
     public function next()
     {
@@ -149,7 +149,7 @@ class BatchQueryResult extends Object implements \Iterator
 
     /**
      * Returns the index of the current dataset.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return integer the index of the current row.
      */
     public function key()
@@ -159,7 +159,7 @@ class BatchQueryResult extends Object implements \Iterator
 
     /**
      * Returns the current dataset.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return mixed the current dataset.
      */
     public function current()
@@ -169,7 +169,7 @@ class BatchQueryResult extends Object implements \Iterator
 
     /**
      * Returns whether there is a valid dataset at the current position.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return boolean whether there is a valid dataset at the current position.
      */
     public function valid()
diff --git a/framework/db/DataReader.php b/framework/db/DataReader.php
index ebe835183e..2630790c8e 100644
--- a/framework/db/DataReader.php
+++ b/framework/db/DataReader.php
@@ -212,7 +212,7 @@ class DataReader extends \yii\base\Object implements \Iterator, \Countable
 
     /**
      * Resets the iterator to the initial state.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @throws InvalidCallException if this method is invoked twice
      */
     public function rewind()
@@ -227,7 +227,7 @@ class DataReader extends \yii\base\Object implements \Iterator, \Countable
 
     /**
      * Returns the index of the current row.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return integer the index of the current row.
      */
     public function key()
@@ -237,7 +237,7 @@ class DataReader extends \yii\base\Object implements \Iterator, \Countable
 
     /**
      * Returns the current row.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return mixed the current row.
      */
     public function current()
@@ -247,7 +247,7 @@ class DataReader extends \yii\base\Object implements \Iterator, \Countable
 
     /**
      * Moves the internal pointer to the next row.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      */
     public function next()
     {
@@ -257,7 +257,7 @@ class DataReader extends \yii\base\Object implements \Iterator, \Countable
 
     /**
      * Returns whether there is a row of data at current position.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return boolean whether there is a row of data at current position.
      */
     public function valid()
diff --git a/framework/db/Query.php b/framework/db/Query.php
index 544982830e..a5a935c9f3 100644
--- a/framework/db/Query.php
+++ b/framework/db/Query.php
@@ -140,7 +140,7 @@ class Query extends Component implements QueryInterface
      * Starts a batch query.
      *
      * A batch query supports fetching data in batches, which can keep the memory usage under a limit.
-     * This method will return a [[BatchQueryResult]] object which implements the `Iterator` interface
+     * This method will return a [[BatchQueryResult]] object which implements the [[\Iterator]] interface
      * and can be traversed to retrieve the data in batches.
      *
      * For example,
@@ -154,7 +154,7 @@ class Query extends Component implements QueryInterface
      *
      * @param integer $batchSize the number of records to be fetched in each batch.
      * @param Connection $db the database connection. If not set, the "db" application component will be used.
-     * @return BatchQueryResult the batch query result. It implements the `Iterator` interface
+     * @return BatchQueryResult the batch query result. It implements the [[\Iterator]] interface
      * and can be traversed to retrieve the data in batches.
      */
     public function batch($batchSize = 100, $db = null)
@@ -181,7 +181,7 @@ class Query extends Component implements QueryInterface
      *
      * @param integer $batchSize the number of records to be fetched in each batch.
      * @param Connection $db the database connection. If not set, the "db" application component will be used.
-     * @return BatchQueryResult the batch query result. It implements the `Iterator` interface
+     * @return BatchQueryResult the batch query result. It implements the [[\Iterator]] interface
      * and can be traversed to retrieve the data in batches.
      */
     public function each($batchSize = 100, $db = null)
diff --git a/framework/web/CookieCollection.php b/framework/web/CookieCollection.php
index 09d51d3327..fe9eeb7785 100644
--- a/framework/web/CookieCollection.php
+++ b/framework/web/CookieCollection.php
@@ -49,7 +49,7 @@ class CookieCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Returns an iterator for traversing the cookies in the collection.
-     * This method is required by the SPL interface `IteratorAggregate`.
+     * This method is required by the SPL interface [[\IteratorAggregate]].
      * It will be implicitly called when you use `foreach` to traverse the collection.
      * @return ArrayIterator an iterator for traversing the cookies in the collection.
      */
@@ -191,7 +191,7 @@ class CookieCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Returns whether there is a cookie with the specified name.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `isset($collection[$name])`.
      * @param string $name the cookie name
      * @return boolean whether the named cookie exists
@@ -203,7 +203,7 @@ class CookieCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Returns the cookie with the specified name.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `$cookie = $collection[$name];`.
      * This is equivalent to [[get()]].
      * @param string $name the cookie name
@@ -216,7 +216,7 @@ class CookieCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Adds the cookie to the collection.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `$collection[$name] = $cookie;`.
      * This is equivalent to [[add()]].
      * @param string $name the cookie name
@@ -229,7 +229,7 @@ class CookieCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Removes the named cookie.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `unset($collection[$name])`.
      * This is equivalent to [[remove()]].
      * @param string $name the cookie name
diff --git a/framework/web/HeaderCollection.php b/framework/web/HeaderCollection.php
index fe3073b582..0cdf8d6752 100644
--- a/framework/web/HeaderCollection.php
+++ b/framework/web/HeaderCollection.php
@@ -31,7 +31,7 @@ class HeaderCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Returns an iterator for traversing the headers in the collection.
-     * This method is required by the SPL interface `IteratorAggregate`.
+     * This method is required by the SPL interface [[\IteratorAggregate]].
      * It will be implicitly called when you use `foreach` to traverse the collection.
      * @return ArrayIterator an iterator for traversing the headers in the collection.
      */
@@ -186,7 +186,7 @@ class HeaderCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Returns whether there is a header with the specified name.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `isset($collection[$name])`.
      * @param string $name the header name
      * @return boolean whether the named header exists
@@ -198,7 +198,7 @@ class HeaderCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Returns the header with the specified name.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `$header = $collection[$name];`.
      * This is equivalent to [[get()]].
      * @param string $name the header name
@@ -211,7 +211,7 @@ class HeaderCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Adds the header to the collection.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `$collection[$name] = $header;`.
      * This is equivalent to [[add()]].
      * @param string $name the header name
@@ -224,7 +224,7 @@ class HeaderCollection extends Object implements \IteratorAggregate, \ArrayAcces
 
     /**
      * Removes the named header.
-     * This method is required by the SPL interface `ArrayAccess`.
+     * This method is required by the SPL interface [[\ArrayAccess]].
      * It is implicitly called when you use something like `unset($collection[$name])`.
      * This is equivalent to [[remove()]].
      * @param string $name the header name
diff --git a/framework/web/Session.php b/framework/web/Session.php
index 167a69cb16..f175119d80 100644
--- a/framework/web/Session.php
+++ b/framework/web/Session.php
@@ -517,7 +517,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
 
     /**
      * Returns an iterator for traversing the session variables.
-     * This method is required by the interface IteratorAggregate.
+     * This method is required by the interface [[\IteratorAggregate]].
      * @return SessionIterator an iterator for traversing the session variables.
      */
     public function getIterator()
@@ -538,7 +538,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
 
     /**
      * Returns the number of items in the session.
-     * This method is required by Countable interface.
+     * This method is required by [[\Countable]] interface.
      * @return integer number of items in the session.
      */
     public function count()
@@ -820,7 +820,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param mixed $offset the offset to check on
      * @return boolean
      */
@@ -832,7 +832,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param integer $offset the offset to retrieve element.
      * @return mixed the element at the offset, null if no element is found at the offset
      */
@@ -844,7 +844,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param integer $offset the offset to set element
      * @param mixed $item the element value
      */
@@ -855,7 +855,7 @@ class Session extends Component implements \IteratorAggregate, \ArrayAccess, \Co
     }
 
     /**
-     * This method is required by the interface ArrayAccess.
+     * This method is required by the interface [[\ArrayAccess]].
      * @param mixed $offset the offset to unset element
      */
     public function offsetUnset($offset)
diff --git a/framework/web/SessionIterator.php b/framework/web/SessionIterator.php
index 69911d33c6..ccdbbf49b8 100644
--- a/framework/web/SessionIterator.php
+++ b/framework/web/SessionIterator.php
@@ -8,7 +8,7 @@
 namespace yii\web;
 
 /**
- * SessionIterator implements an iterator for traversing session variables managed by [[Session]].
+ * SessionIterator implements an [[\Iterator|iterator]] for traversing session variables managed by [[Session]].
  *
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
@@ -35,7 +35,7 @@ class SessionIterator implements \Iterator
 
     /**
      * Rewinds internal array pointer.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      */
     public function rewind()
     {
@@ -44,7 +44,7 @@ class SessionIterator implements \Iterator
 
     /**
      * Returns the key of the current array element.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return mixed the key of the current array element
      */
     public function key()
@@ -54,7 +54,7 @@ class SessionIterator implements \Iterator
 
     /**
      * Returns the current array element.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return mixed the current array element
      */
     public function current()
@@ -64,7 +64,7 @@ class SessionIterator implements \Iterator
 
     /**
      * Moves the internal pointer to the next array element.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      */
     public function next()
     {
@@ -75,7 +75,7 @@ class SessionIterator implements \Iterator
 
     /**
      * Returns whether there is an element at current position.
-     * This method is required by the interface Iterator.
+     * This method is required by the interface [[\Iterator]].
      * @return boolean
      */
     public function valid()