Similar problem (#79022) also exists in Interfaces

Author: laruence

Zend/tests/bug79022.phpt

@@ -13,9 +13,26 @@ function my_autoloader($class) {
 	if ($class == 'Bar') {
 		eval("class Bar {}");
     }
+
+	if ($class == 'Dummy') {
+		eval ("class Dummy implements iFoo {}");
+	}
+
+
+	if (interface_exists('iFoo', 0)) {
+		new Dummy();
+	}
+	if ($class == 'iFoo') {
+		eval ("interface iFoo extends iBar {}");
+	}
+
+	if ($class == 'iBar') {
+		eval ("interface iBar {}");
+	}
 }
 spl_autoload_register('my_autoloader');
 new Foo();
+new Dummy();
 echo "okey";
 ?>
 --EXPECT--

Zend/zend_builtin_functions.c

@@ -1476,7 +1476,7 @@ static inline void class_exists_impl(INTERNAL_FUNCTION_PARAMETERS, int flags, in
 	}
 
  	if (ce) {
-		RETURN_BOOL((flags == 0 || (ce->ce_flags & flags)) && !(ce->ce_flags & skip_flags));
+		RETURN_BOOL(((ce->ce_flags & flags) == flags) && !(ce->ce_flags & skip_flags));
 	} else {
 		RETURN_FALSE;
 	}
@@ -1495,7 +1495,7 @@ ZEND_FUNCTION(class_exists)
    Checks if the class exists */
 ZEND_FUNCTION(interface_exists)
 {
-	class_exists_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_INTERFACE, 0);
+	class_exists_impl(INTERNAL_FUNCTION_PARAM_PASSTHRU, ZEND_ACC_LINKED|ZEND_ACC_INTERFACE, 0);
 }
 /* }}} */