#42932 [NEW]: reference operator is different between $GLOBALS array and declared global

From: cpu-g at yahoo dot com dot tw Operating system: win xp PHP version: 5.2.4 PHP Bug Type: Apache2 related Bug description: reference operator is different between $GLOBALS array and declared global Description: ------------ I use reference operator in local variable calculatedly. Because I know that reference is similar to pointer in C language and they are dangerous in some situation,I want to know that if PHP allow reference to local variable. But $GLOBALS array allowed reference to local variable, declared global keyword failed. Reproduce code: --------------- <?php $global1=100; $global2=100; function foo() { $local=10; global $global1; $global1=&$local; $GLOBALS["global2"] =&$local; } foo(); echo "$global1 : $global2 <BR>"; ?> Expected result: ---------------- 100 : 100 or 10 : 10. 1st output is good for any situation. It guarantee that reference to the local variable is not allowed. So Reference operator can't work in 2 style: $GLOBALS array and declared global. but actually only $GLOBALS array can work. 2st output is bad. It symbolize that we still can access local variable in function foo() after calling foo(). It may result in access violation. Actual result: -------------- 100 : 10 -- Edit bug report at http://bugs.php.net/?id=42932&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42932&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42932&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42932&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=42932&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=42932&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=42932&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=42932&r=needscript Try newer version: http://bugs.php.net/fix.php?id=42932&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=42932&r=support Expected behavior: http://bugs.php.net/fix.php?id=42932&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=42932&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=42932&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=42932&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42932&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=42932&r=dst IIS Stability: http://bugs.php.net/fix.php?id=42932&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=42932&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=42932&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=42932&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=42932&r=mysqlcfg