Merge branch 'PHP-7.4'

* PHP-7.4:
  Add test for bug #63816

Author: nikic

Zend/tests/bug63816.phpt

@@ -0,0 +1,45 @@
+--TEST--
+Bug #63816: implementation child interface and after parent cause fatal error
+--FILE--
+<?php
+
+interface RootInterface
+{
+    function foo();
+}
+
+interface FirstChildInterface extends RootInterface
+{
+    function foo();
+}
+
+interface SecondChildInterface extends RootInterface
+{
+    function foo();
+}
+
+class A implements FirstChildInterface, SecondChildInterface
+{
+    function foo()
+    {
+    }
+}
+
+class B implements RootInterface, FirstChildInterface
+{
+    function foo()
+    {
+    }
+}
+
+class C implements FirstChildInterface, RootInterface
+{
+    function foo()
+    {
+    }
+}
+
+?>
+===DONE===
+--EXPECT--
+===DONE===