diff --git a/reference/spl/cachingiterator.xml b/reference/spl/cachingiterator.xml
index 0dc0805efc..be00f5dd99 100644
--- a/reference/spl/cachingiterator.xml
+++ b/reference/spl/cachingiterator.xml
@@ -111,35 +111,43 @@
CachingIterator::CALL_TOSTRING
- Description here...
+ Convert every element to string.CachingIterator::CATCH_GET_CHILD
- Description here...
+ Don't throw exception in accessing children.CachingIterator::TOSTRING_USE_KEY
- Description here...
+
+ Use key for conversion to
+ string.
+ CachingIterator::TOSTRING_USE_CURRENT
- Description here...
+
+ Use current for
+ conversion to string.CachingIterator::TOSTRING_USE_INNER
- Description here...
+
+ Use inner
+ for conversion to string.
+