Correct phpDoc for return in several cases

close #6733

framework/db/ActiveRecord.php

@@ -567,7 +567,7 @@ class ActiveRecord extends BaseActiveRecord
      * In the above step 1 and 3, events named [[EVENT_BEFORE_DELETE]] and [[EVENT_AFTER_DELETE]]
      * will be raised by the corresponding methods.
      *
-     * @return integer|boolean the number of rows deleted, or false if the deletion is unsuccessful for some reason.
+     * @return integer|false the number of rows deleted, or false if the deletion is unsuccessful for some reason.
      * Note that it is possible the number of rows deleted is 0, even though the deletion execution is successful.
      * @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data
      * being deleted is outdated.
@@ -596,7 +596,7 @@ class ActiveRecord extends BaseActiveRecord
 
     /**
      * Deletes an ActiveRecord without considering transaction.
-     * @return integer|boolean the number of rows deleted, or false if the deletion is unsuccessful for some reason.
+     * @return integer|false the number of rows deleted, or false if the deletion is unsuccessful for some reason.
      * Note that it is possible the number of rows deleted is 0, even though the deletion execution is successful.
      * @throws StaleObjectException
      */

framework/db/BaseActiveRecord.php

@@ -767,7 +767,7 @@ abstract class BaseActiveRecord extends Model implements ActiveRecordInterface
      * In the above step 1 and 3, events named [[EVENT_BEFORE_DELETE]] and [[EVENT_AFTER_DELETE]]
      * will be raised by the corresponding methods.
      *
-     * @return integer|boolean the number of rows deleted, or false if the deletion is unsuccessful for some reason.
+     * @return integer|false the number of rows deleted, or false if the deletion is unsuccessful for some reason.
      * Note that it is possible the number of rows deleted is 0, even though the deletion execution is successful.
      * @throws StaleObjectException if [[optimisticLock|optimistic locking]] is enabled and the data
      * being deleted is outdated.