diff --git a/language/functions.xml b/language/functions.xml
index d94407c384..1260f0b257 100644
--- a/language/functions.xml
+++ b/language/functions.xml
@@ -399,6 +399,15 @@ Making a bowl of acidophilus raspberry.
PHP 5.0.0
+
+ self
+
+ The parameter must be an &instanceof; the same class as the one the
+ method is defined on. This can only be used on class and instance
+ methods.
+
+ PHP 5.0.0
+
array