diff --git a/reference/reflection/reflectionclass/isiterable.xml b/reference/reflection/reflectionclass/isiterable.xml
index df4413424a5e..03aeeed53cc7 100644
--- a/reference/reflection/reflectionclass/isiterable.xml
+++ b/reference/reflection/reflectionclass/isiterable.xml
@@ -38,23 +38,35 @@
 <![CDATA[
 <?php
 
-class IteratorClass implements Iterator {
-    public function __construct() { }
-    public function key() { }
-    public function current() { }
-    function next() { }
-    function valid() { }
-    function rewind() { }
+class IteratorClass implements Iterator
+{
+    public function __construct() {}
+
+    #[\ReturnTypeWillChange]
+    public function key() {}
+
+    #[\ReturnTypeWillChange]
+    public function current() {}
+
+    #[\ReturnTypeWillChange]
+    public function next() {}
+
+    #[\ReturnTypeWillChange]
+    public function valid() {}
+
+    #[\ReturnTypeWillChange]
+    public function rewind() {}
 }
-class DerivedClass extends IteratorClass { }
-class NonIterator { }
+class DerivedClass extends IteratorClass {}
+class NonIterator {}
 
-function dump_iterable($class) {
+function dump_iterable($class)
+{
     $reflection = new ReflectionClass($class);
     var_dump($reflection->isIterable());
 }
 
-$classes = array("ArrayObject", "IteratorClass", "DerivedClass", "NonIterator");
+$classes = ["ArrayObject", "IteratorClass", "DerivedClass", "NonIterator",];
 
 foreach ($classes as $class) {
     echo "Is $class iterable? ";