#37836 [NEW]: Value changed with passing by reference

From: freebsd at akruijff dot dds dot nl Operating system: FreeBSD 6.1 PHP version: 5.1.4 PHP Bug Type: Class/Object related Bug description: Value changed with passing by reference Description: ------------ The same objects ends up being added multiple times to the internal array. I don't understand why this happens. Reproduce code: --------------- class X { private $arr = array(); function add(X &$y) { $this->arr[] =& $y; } } $x = new X(); for ($i = 0; $i < 10; $i++) { $y = new X(); echo "$i: adding $y to $x<br>"; $x->add($y); } Expected result: ---------------- I'm expecting to see this: 0: adding Object id #2 to Object id #1 1: adding Object id #3 to Object id #1 2: adding Object id #4 to Object id #1 3: adding Object id #5 to Object id #1 4: adding Object id #6 to Object id #1 5: adding Object id #7 to Object id #1 6: adding Object id #8 to Object id #1 7: adding Object id #9 to Object id #1 8: adding Object id #10 to Object id #1 9: adding Object id #11 to Object id #1 Actual result: -------------- 0: adding Object id #2 to Object id #1 1: adding Object id #3 to Object id #1 2: adding Object id #2 to Object id #1 3: adding Object id #3 to Object id #1 4: adding Object id #2 to Object id #1 5: adding Object id #3 to Object id #1 6: adding Object id #2 to Object id #1 7: adding Object id #3 to Object id #1 8: adding Object id #2 to Object id #1 9: adding Object id #3 to Object id #1 -- Edit bug report at http://bugs.php.net/?id=37836&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=37836&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=37836&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=37836&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=37836&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=37836&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=37836&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=37836&r=needscript Try newer version: http://bugs.php.net/fix.php?id=37836&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=37836&r=support Expected behavior: http://bugs.php.net/fix.php?id=37836&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=37836&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=37836&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=37836&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37836&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=37836&r=dst IIS Stability: http://bugs.php.net/fix.php?id=37836&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=37836&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=37836&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=37836&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=37836&r=mysqlcfg