#42271 [NEW]: extract EXTR_REFS and/or references

From: rodji at tut dot by Operating system: Win32 XP sp2.2600 PHP version: 4.4.7 PHP Bug Type: Scripting Engine problem Bug description: extract EXTR_REFS and/or references Description: ------------ Tested on: Apache/1.3.33 (Win32) PHP/4.4.7 and 5.2.3 trouble with references in functions Reproduce code: --------------- function args_select($args, $args_list, $def_val) { $r = array(); foreach ($args_list as $key) { if (array_key_exists($key, $args)){ $r[$key] = $args[$key]; }else{ $r[$key] = $def_val; //equal $r[$key] =& $def_val why??? //$r[$key] = (string)$def_val; //solution#1 } } return $r; } $argums = array('action'=>'edit', 'id'=>1); $select = array('action','to_do','back'); //debug_zval_dump(args_select($argums, $select, '')); extract(args_select($argums, $select, ''), EXTR_OVERWRITE | EXTR_REFS); //solution#2 why??? /*$m = args_select($argums, $select, ''); //OR //$m =& args_select($argums, $select, ''); extract($m, EXTR_OVERWRITE | EXTR_REFS); */ $to_do = 'new'; debug_zval_dump (&$back); ?> Expected result: ---------------- &string(0) "" refcount(2) Actual result: -------------- &string(3) "new" refcount(3) -- Edit bug report at http://bugs.php.net/?id=42271&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=42271&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=42271&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=42271&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=42271&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=42271&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=42271&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=42271&r=needscript Try newer version: http://bugs.php.net/fix.php?id=42271&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=42271&r=support Expected behavior: http://bugs.php.net/fix.php?id=42271&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=42271&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=42271&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=42271&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42271&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=42271&r=dst IIS Stability: http://bugs.php.net/fix.php?id=42271&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=42271&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=42271&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=42271&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=42271&r=mysqlcfg