From 31ef559712dae57046b6377f07634ad57f9d88cf Mon Sep 17 00:00:00 2001
From: Felipe Pena <felipe@php.net>
Date: Sat, 19 Nov 2011 13:36:03 +0000
Subject: [PATCH] - Fixed bug #43200 (Interface implementation / inheritence
 not possible in abstract classes)

---
 NEWS                       |  4 +++
 Zend/tests/bug43200.phpt   | 51 ++++++++++++++++++++++++++++++++++++++
 Zend/tests/bug43200_2.phpt | 25 +++++++++++++++++++
 Zend/zend_compile.c        |  3 ++-
 4 files changed, 82 insertions(+), 1 deletion(-)
 create mode 100644 Zend/tests/bug43200.phpt
 create mode 100644 Zend/tests/bug43200_2.phpt

diff --git a/NEWS b/NEWS
index 40c0661eaf..203fe9e38e 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,10 @@ PHP                                                                        NEWS
     (klightspeed at netspace dot net dot au)
   . Fixed bug #52624 (tempnam() by-pass open_basedir with nonnexistent
     directory). (Felipe)
+    
+- Zend Engine:
+  . Fixed bug #43200 (Interface implementation / inheritence not possible in
+    abstract classes). (Felipe)
 
 - PHP-FPM SAPI:
   . Fixed bug #60179 (php_flag and php_value does not work properly). (fat)
diff --git a/Zend/tests/bug43200.phpt b/Zend/tests/bug43200.phpt
new file mode 100644
index 0000000000..24a8bbb1d7
--- /dev/null
+++ b/Zend/tests/bug43200.phpt
@@ -0,0 +1,51 @@
+--TEST--
+Bug #43200 (Interface implementation / inheritence not possible in abstract classes)
+--FILE--
+<?php
+
+interface a {
+	function foo();
+	function bar();
+}
+interface b {
+	function foo();
+}
+
+abstract class c {
+	function bar() { }
+}
+
+class x extends c implements a, b {
+	function foo() { }
+}
+
+ReflectionClass::export('x');
+
+?>
+--EXPECTF--
+Class [ <user> class x extends c implements a, b ] {
+  @@ %s 15-17
+
+  - Constants [0] {
+  }
+
+  - Static properties [0] {
+  }
+
+  - Static methods [0] {
+  }
+
+  - Properties [0] {
+  }
+
+  - Methods [2] {
+    Method [ <user, prototype b> public method foo ] {
+      @@ %s 16 - 16
+    }
+
+    Method [ <user, inherits c, prototype a> public method bar ] {
+      @@ %s 12 - 12
+    }
+  }
+}
+
diff --git a/Zend/tests/bug43200_2.phpt b/Zend/tests/bug43200_2.phpt
new file mode 100644
index 0000000000..5efc5facff
--- /dev/null
+++ b/Zend/tests/bug43200_2.phpt
@@ -0,0 +1,25 @@
+--TEST--
+Bug #43200.2 (Interface implementation / inheritence not possible in abstract classes)
+--FILE--
+<?php
+
+interface A {
+	function foo();
+}
+
+abstract class B implements A {
+	abstract public function foo();
+}
+
+class C extends B {
+	public function foo() {
+		echo 'works';
+	}
+}
+
+$o = new C();
+$o->foo();
+
+?>
+--EXPECTF--
+works
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index 1248715f12..0b881098cf 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -2628,7 +2628,8 @@ static zend_bool do_inherit_method_check(HashTable *child_function_table, zend_f
 		return 1; /* method doesn't exist in child, copy from parent */
 	}
 
-	if (parent->common.fn_flags & ZEND_ACC_ABSTRACT
+	if ((parent->common.scope->ce_flags & ZEND_ACC_INTERFACE) == 0
+		&& parent->common.fn_flags & ZEND_ACC_ABSTRACT
 		&& parent->common.scope != (child->common.prototype ? child->common.prototype->common.scope : child->common.scope)
 		&& child->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_IMPLEMENTED_ABSTRACT)) {
 		zend_error(E_COMPILE_ERROR, "Can't inherit abstract function %s::%s() (previously declared abstract in %s)", 
-- 
2.50.1