#46504 [NEW]: Lexical variable scope

From: glideraerobatics at hotmail dot com Operating system: PHP version: 5.3.0alpha2 PHP Bug Type: Feature/Change Request Bug description: Lexical variable scope Description: ------------ Many languages such as Perl, Java, C++ support lexically scoped variables. Lexical scope allows a variable to exist only within its containing closure. Using lexically scoped (and therefore also declared) variables prevents a whole lot of accidental bugs, memory waste, and poor code design. Perl has the "my" declaration to achieve this: http://www.developer.com/lang/perl/article.phpr/3323421 There will have to be some kind of pragma to turn on this feature only in functions or files where it's wanted. Reproduce code: --------------- my $person = new Person("Joe"); if ($person->isHomeless()) { my $house = new House(); while (!$house->isComplete()) { $house->addBricks(); } $person->assignHome($house); } // $house no longer exists here. if ($person->isHungry()) { my $food = array('bannanas', 'chocolate'); $person->eat($food); } // $food no longer exists here. -- Edit bug report at http://bugs.php.net/?id=46504&edit=1 -- Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=46504&r=trysnapshot52 Try a CVS snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=46504&r=trysnapshot53 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=46504&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=46504&r=fixedcvs Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=46504&r=needdocs Fixed in release: http://bugs.php.net/fix.php?id=46504&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=46504&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=46504&r=needscript Try newer version: http://bugs.php.net/fix.php?id=46504&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=46504&r=support Expected behavior: http://bugs.php.net/fix.php?id=46504&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=46504&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=46504&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=46504&r=globals PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46504&r=php4 Daylight Savings: http://bugs.php.net/fix.php?id=46504&r=dst IIS Stability: http://bugs.php.net/fix.php?id=46504&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=46504&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=46504&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=46504&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=46504&r=mysqlcfg