#29429 [Bgs]: unset( $GLOBALS['foo']); unset only global variable, not variables that REFERED

ID: 29429 Updated by: vrana@php.net Reported By: kingoleg at mail dot ru Status: Bogus Bug Type: Documentation problem Operating System: All PHP Version: 4.3.8 New Comment: This is slightly different. Explaining just here: $foo inside a() is reference to value referenced also by $GLOBALS['foo']. $foo inside b() is the same. So there are 3 references to the value. Unseting $GLOBALS['foo'] inside b() destroys only one reference. Returning from b() destroys the second reference. But there still exists one reference to the value ($foo in a()), so var_dump() inside a() prints the value. Last reference is destroyed after returning from a(), so var_dump() outside function prints NULL. You can understand what's happening if you understand the sentence "$a and $b are completely equal here, that's not $a is pointing to $b or vice versa, that's $a and $b pointing to the same place." written in the manual. So this is really bogus. Previous Comments: ------------------------------------------------------------------------ [2004-07-29 09:51:38] tony2001@php.net Then it's a bogus docu problem. ------------------------------------------------------------------------ [2004-07-29 09:44:18] kingoleg at mail dot ru Doc problem about this http://bugs.php.net/?id=29428 was closed with bogus status :) ------------------------------------------------------------------------ [2004-07-29 09:23:59] tony2001@php.net It's a docu problem, not a bug. ------------------------------------------------------------------------ [2004-07-28 15:05:56] kingoleg at mail dot ru Description: ------------ unset( $GLOBALS['foo']); unset only global variable, not variables that REFERED to global variable How we can unset global variable with all referenced variable using unset() function? Do we must user assign to null? Reproduce code: --------------- <?php function a( &$foo) { $foo = 'ok'; b( $foo); var_dump( $foo); } function b( &$foo) { $foo = 'not ok'; unset( $GLOBALS['foo']); } global $foo; $foo = 'global'; a($foo); var_dump( $foo); ?> Expected result: ---------------- NULL NULL Actual result: -------------- string(6) "not ok" NULL ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=29429&edit=1