#34009 [Opn->Fbk]: PHP 4.4.0 shows on some platforms a return by reference Notice,but it shouldn't

ID: 34009 Updated by: tony2001@php.net Reported By: ast at gmx dot ch -Status: Open +Status: Feedback Bug Type: Scripting Engine problem Operating System: Gentoo Linux PHP Version: 4.4.0 New Comment: Please try CVS snapshot first (I've given the link to it). I have no idea how to look into something that is not reproducible, so I'd appreciate if you give some guidelines (an account on a machine would be fine). Previous Comments: ------------------------------------------------------------------------ [2005-08-05 20:02:42] ast at gmx dot ch That's my point. It doesn't work on all systems. It works on two of my systems, both running PHP 4.4.0. It doesn't work on 3 other systems I have access to test the reproduce code. I've listed the PHPinfo links and some systems specs of systems that pass the test and systems that don't pass the test. All of them are running PHP 4.4.0. I'd really appreciate if you could look into the issue with your indepth knowledge of PHP. ------------------------------------------------------------------------ [2005-08-05 19:56:47] tony2001@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip Works fine here. ------------------------------------------------------------------------ [2005-08-05 19:50:05] ast at gmx dot ch Here's the reproduce code: <?php error_reporting(E_ALL); if (version_compare(PHPVERSION(), '4.4.0') != 0) print "This reproduce code is only for PHP 4.4.0"; $bar = new Bug(); $baz = $bar->foo(); class Bug { var $_flag; function Bug() { $this->_flag = 0; } function &foo() { if (!$this->_flag) { $false = false; return $false; /* this is line 18 */ } $false = false; return $false; } } ?> Expected result: ---------------- no NOTICEs Actual result: -------------- Notice: Only variable references should be returned by reference in reproduce.php on line 18 I've added the two other methods in the original reproduce code just to show that very slight modifications of the code do not give a PHP Notice. And please remember that I can't reproduce it on all systems. ------------------------------------------------------------------------ [2005-08-05 19:39:34] tony2001@php.net Please provide an exact reproduce code (the URL you've given contains a lot of code snippets and I can't understand which one of them is the reproduce case). ------------------------------------------------------------------------ [2005-08-05 18:01:08] ast at gmx dot ch From the reproduce script: Unexpected result oberserved on - http://nl01.pcextreme.nl/phpinfo.php (PHP 4.4.0, Linux Linux i686) - PHP 4.4.0 cgi hosted by Powweb.com, Apache/1.3.33 (Unix) FrontPage/5.0.2.2635 mod_ssl/2.8.22 OpenSSL/0.9.7d PowWeb/1.1, FreeBSD clust05-www01.powweb.com 4.11-RELEASE FreeBSD 4.11-RELEASE #0: Thu Ma i386 - Gentoo linux, PHP 4.4.0, apache 2, x86: http://dev.nei.ch/bugs/php440_notice_bug/phpinfo_gentoo_with_bug.html Correct behavior observed on - dozens / hundreds other servers, e.g. - Windows XP SP 2, PHP 4.4.0 cgi, apache 2, x86 - Gentoo linux, PHP 4.4.0, apache 2, x86: http://dev.nei.ch/bugs/php440_notice_bug/phpinfo_gentoo_without_bug.html (this is another gentoo box, completely unrelated to the other) ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/34009 -- Edit this bug report at http://bugs.php.net/?id=34009&edit=1