Edit report at https://bugs.php.net/bug.php?id=65580&edit=1
ID: 65580
Updated by: ahar...@php.net
Reported by: xiezhenye at gmail dot com
Summary: reference will affect expression result with
multiple ++$x
-Status: Open
+Status: Not a bug
Type: Bug
Package: Scripting Engine problem
Operating System: Any
PHP Version: 5.5.3
Block user comment: N
Private report: N
New Comment:
This is undefined behaviour in PHP, as in most languages with C-derived
syntaxes,
due to the lack of a sequence point between the post-increments.
Mailing list discussion from last month:
http://marc.info/?t=137427934300002&r=1&w=2
This is also documented, see example 1 on:
http://www.php.net/manual/en/language.operators.precedence.php
Previous Comments:
------------------------------------------------------------------------
[2013-08-29 02:58:28] xiezhenye at gmail dot com
Description:
------------
reference will affect expression result with multiple ++$x.
Test script:
---------------
$a = 1;
echo (++$a)+(++$a);
$a = 1;
$b = &$a;
echo (++$a)+(++$a);
Expected result:
----------------
55
Actual result:
--------------
56
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=65580&edit=1
