#45145 [NEW]: reference aliasing is working backwards, wiping the var

From: phpbug at thoria dot org Operating system: Linux PHP version: 5.2CVS-2008-06-01 (snap) PHP Bug Type: Variables related Bug description: reference aliasing is working backwards, wiping the var Description: ------------ On versions 5.2.3 and 4.3.1(Zend off), on different shared hosting servers. Within one large function/loop in my app $x = &$y; y is destroyed and replaced by x, intermittently. unset($x) is ignored if placed above it, and x still goes into y. There is no workaround, besides using $x = $y. I think any ref assignments in this loop behave like this if $x has had a prior value. You will need to have my whole app installed. It's so weird, it makes me feel dumb to submit it. Reproduce code: --------------- $bb = "original string"; $aa = "moo"; unset($aa); $aa = &$bb; echo "AA->$aa, BB->$bb <br>"; or $bb = "original string"; $aa = "moo"; $aa = &$bb; echo "AA->$aa, BB->$bb <br>"; The following is OK $aa = "moo"; $bb = "original string"; $aa = &$bb; echo "AA->$aa, BB->$bb <br>"; Expected result: ---------------- AA->original string, BB->original string AA->original string, BB->original string AA->original string, BB->original string Actual result: -------------- AA->original string, BB->original string AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->original string, BB->original string AA->moo, BB->moo AA->moo, BB->moo AA->original string, BB->original string AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->moo, BB->moo AA->original string, BB->original string AA->moo, BB-> -- Edit bug report at http://bugs.php.net/?id=45145&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=45145&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=45145&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=45145&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=45145&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=45145&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=45145&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=45145&r=needscript Try newer version: http://bugs.php.net/fix.php?id=45145&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=45145&r=support Expected behavior: http://bugs.php.net/fix.php?id=45145&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=45145&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=45145&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=45145&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=45145&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=45145&r=dst IIS Stability: http://bugs.php.net/fix.php?id=45145&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=45145&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=45145&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=45145&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=45145&r=mysqlcfg