Bug #55021 [NEW]: Multiple bug on variable variable error parse/comportement

From: Operating system: Debian lenny/SID PHP version: 5.3SVN-2011-06-09 (snap) Package: Scripting Engine problem Bug Type: Bug Bug description:Multiple bug on variable variable error parse/comportement Description: ------------ When use variable variable with property array in class, a multipe bug occur. On function exemple fn, variable variable cast in string On function exemple fn3, parse error 'Cannot use [] for reading in' Test script: --------------- class C { public $a = array('first' => 'baz'); /** * It's work but $this->a is cast in string and override array * @note $this->a : string(3) "foo" */ public function fn($k) { $b = 'a'; $this->$b[$k] = 'foo'; } /** * Normaly use * @note Similar result of fn * @note $this->a : string(3) "foo" */ public function fn2($k) { $b = 'a'; $this->$b = 'foo'; } /** * This case is most interesting, because as it run parse error * @note don't parse $this->$b */ public function fn3($k) { $b = 'a'; $this->$b[$k][] = 'foo'; ///BUG Error parse : PHP Fatal error: Cannot use [] for reading in .... } /** * Solution for fix fn3 */ public function fn4($k) { $b = 'a'; $tmp =& $this->$b; $tmp[$k][] = 'foo'; } } Expected result: ---------------- for function fn('key') : array('first' => 'baz', 'key' => 'foo') for function fn3('key') : array(2) { ["first"]=> string(3) "baz" ["key"]=> array(1) { [0]=> string(3) "foo" } } Actual result: -------------- for function fn('key') : string(3) "foo" for function fn3('key') : Cannot use [] for reading in... -- Edit bug report at http://bugs.php.net/bug.php?id=55021&edit=1 -- Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=55021&r=trysnapshot52 Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=55021&r=trysnapshot53 Try a snapshot (trunk): http://bugs.php.net/fix.php?id=55021&r=trysnapshottrunk Fixed in SVN: http://bugs.php.net/fix.php?id=55021&r=fixed Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=55021&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=55021&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=55021&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=55021&r=needscript Try newer version: http://bugs.php.net/fix.php?id=55021&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=55021&r=support Expected behavior: http://bugs.php.net/fix.php?id=55021&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=55021&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=55021&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=55021&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=55021&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=55021&r=dst IIS Stability: http://bugs.php.net/fix.php?id=55021&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=55021&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=55021&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=55021&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=55021&r=mysqlcfg