[PHP-BUG] Bug #51479 [NEW]: property_exists now wrong

From:             
Operating system: Windows
PHP version:      5.3.2
Package:          Class/Object related
Bug Type:         Bug
Bug description:property_exists now wrong

Description:
------------
Now that property_exists returns true for all private properties, there is
no way (I know) to test that a property is private before writing to it and
causing a fatal error. 

The previous behaviour was wrong - private properties that are in scope
should return true - but the new code is worse. 
See Bug #50810: property_exists does not work for private 

I think property_exists should return true for writable properties...
  which implies a scope... 
    if the user coded $this then the scope is the current scope. 

If the use gives a class name, then the scope is that class. 

I have not managed to re-code the routine below to work in 5.3.0 (let alone
both 5.3.? and 5.2.?). 



Test script:
---------------
public function setField($fld, $value) {
      // set the fld to the value
      if (property_exists($this,$fld)) {
         $this->$fld = $value;  // handles public and protected fields 
         return;
      }
      $this->setMapped($fld,$value); // for private vars.
   }

Create a class with the above function. Create a sub-class with a private
variable. Call it on the sub-class with fldname and value. 
In 5.3.0 this crashes with a fatal error. 
In 5.2.9 it calls setMapped. 




-- 
Edit bug report at http://bugs.php.net/bug.php?id=51479&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=51479&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=51479&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=51479&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=51479&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51479&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=51479&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=51479&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=51479&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=51479&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=51479&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=51479&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=51479&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=51479&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=51479&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=51479&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=51479&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=51479&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=51479&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=51479&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=51479&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=51479&r=mysqlcfg