note 8349 modified in unset by jmcastagnetto

[Editor's note: merged Jon's annotations] Beware! If you are in a function and the variable is a global you are accessing using 'global', then unset does not work. It simply un-globalises the variable, instead of unsetting the global. This changed between PHP3 and PHP4. It appears that unset($GLOBALS['foo']) might be the right way to go now. It is actually even subtler than that. If you have a situation where before, you were doing: global $foo; unset($foo); Then changing it to: global $foo; unset($GLOBALS['foo']); will not unset the local $foo. The correct fix is: unset($GLOBALS['foo']); global $foo; or global $foo; unset($foo); unset($GLOBALS['foo']); http://www.php.net/manual/function.unset.php