Match RFC message

Author: DanielEScherzer

Zend/tests/debug_info/debug_info.phpt

@@ -37,6 +37,6 @@ object(Foo)#%d (3) {
   int(3)
 }
 
-Deprecated: Returning null from Bar::__debugInfo() is deprecated in %s on line %d
+Deprecated: Returning null from Bar::__debugInfo() is deprecated, return an empty array instead in %s on line %d
 object(Bar)#%d (0) {
 }

Zend/tests/debug_info/recursion_return_null.phpt

@@ -24,7 +24,7 @@ var_dump($f);
 --EXPECTF--
 in handler
 
-Deprecated: Returning null from Foo::__debugInfo() is deprecated in %s on line %d
+Deprecated: Returning null from Foo::__debugInfo() is deprecated, return an empty array instead in %s on line %d
 object(Foo)#3 (0) {
 }
 object(Foo)#2 (0) {

Zend/zend_object_handlers.c

@@ -223,7 +223,7 @@ ZEND_API HashTable *zend_std_get_debug_info(zend_object *object, int *is_temp) /
 			return Z_ARRVAL(retval);
 		}
 	} else if (Z_TYPE(retval) == IS_NULL) {
-		zend_error(E_DEPRECATED, "Returning null from %s::__debugInfo() is deprecated",
+		zend_error(E_DEPRECATED, "Returning null from %s::__debugInfo() is deprecated, return an empty array instead",
 			ZSTR_VAL(ce->name));
 		*is_temp = 1;
 		ht = zend_new_array(0);