#43080 [Opn->Asn]: Global object is null before destroying it.

ID: 43080 Updated by: jani@php.net Reported By: joustin at post dot pl -Status: Open +Status: Assigned Bug Type: Class/Object related -Operating System: win32 +Operating System: * PHP Version: 5.2.4 -Assigned To: +Assigned To: dmitry New Comment: Dmitry, can you check this out please. Previous Comments: ------------------------------------------------------------------------ [2007-10-25 13:06:54] joustin at post dot pl Upgraded from 5.2.3 to 5.2.4. I could not find any reference to if (and why) it would change. Changelog gives no clue either. It happens to globally defined vars - php engine nulls the reference to object before calling it's destructor. IMO illogical and inconsistent. Worked fine before 5.2.4. ------------------------------------------------------------------------ [2007-10-25 12:55:59] jani@php.net Upgraded from what PHP version..? AFAIK, this is how it should work, so I don't understand why you report a bug about it.. ------------------------------------------------------------------------ [2007-10-23 10:43:02] joustin at post dot pl Description: ------------ This is quite interesting. Appeared after upgrading to 5.2.4 and broke my code. It's great that objects are finally destroyed in the right order, but a whole lot of code still relies on "destroy all" or "cleanup" functions. What struck me is that as of 5.2.4, my object in the moment of calling it's destructor, in global scope, appears as NULL. I've also devised a simple and dirty workaround, which is found in the code below. Thanks! Reproduce code: --------------- class foo { function __construct(){ echo "Constructed foo\n"; } function getDb(){ echo "Getting DB"; } function __destruct(){ echo "Destructing foo\n"; echo "Trying to destruct bar\n"; global $bar; if(false){ // DIRTY WORKAROUND global $foo; $foo = $this; } $bar->__destruct(); } } class bar { protected $destroyed = false; function __construct(){ echo "Constructed bar\n"; } function __destruct(){ if(!$this->destroyed){ echo " Destructing bar\n"; global $foo; echo " Our global parent, foo, is of type ".gettype($foo)."\n"; $this->destroyed = true; } } } $bar = new bar(); $foo = new foo(); echo "--\nScript finishes...\n"; Expected result: ---------------- Constructed bar Constructed foo -- Script finishes... Destructing foo Trying to destruct bar Destructing bar Our global parent, foo, is of type object Actual result: -------------- Constructed bar Constructed foo -- Script finishes... Destructing foo Trying to destruct bar Destructing bar Our global parent, foo, is of type NULL ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=43080&edit=1