Re: [PHP] unsetting object references
Erik Price wrote: > > On Wednesday, April 17, 2002, at 03:59 PM, Robert Cummings wrote: > > > Now if what you meant was the following: > > > > $objectFoo = new MyObject(); > > $objectFee = &$objectFoo; > > > > unset( $objectFoo ); > > > > Then the object shouldn't be deleted since $objectFee is still > > referencing > > it. You will just break the reference. Correct me if I'm wrong *chuckle* > > What if I did > > $objectFoo = new MyObject; > $objectFee = $objectFoo; > > unset($objectFoo); > > essentially, does PHP make a (deep|shallow) copy of an object in this > reassignment, or is it just creating a new reference? Should be a copy, and it should be safe... though I recall a discussion last week that displayed an interesting bug (feature?). Cheers, Rob. -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:[EMAIL PROTECTED] | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] unsetting object references
On Wednesday, April 17, 2002, at 03:59 PM, Robert Cummings wrote: > Now if what you meant was the following: > > $objectFoo = new MyObject(); > $objectFee = &$objectFoo; > > unset( $objectFoo ); > > Then the object shouldn't be deleted since $objectFee is still > referencing > it. You will just break the reference. Correct me if I'm wrong *chuckle* What if I did $objectFoo = new MyObject; $objectFee = $objectFoo; unset($objectFoo); essentially, does PHP make a (deep|shallow) copy of an object in this reassignment, or is it just creating a new reference? Erik Erik Price Web Developer Temp Media Lab, H.H. Brown [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] unsetting object references
Erik Price wrote: > > Hey, sorry to bother you all but I have another obscure question about > objects in PHP (yes I really do care about the answer)... > > I'm simply wondering if I unset() a reference to an object, whether or > not it destroys that object, if there are other references to it that > still exist. > > $_SESSION['object'] = serialize($object); > > (in another script:) > > $object = unserialize($_SESSION['object']); > // do some stuff with $object > unset($object); > > What's going on with my $_SESSION['object'] ? In the example you are providing $object and $_SESSION['object'] aren't even the same thing and unless something else is referencing $object then $object will be deleted. Now if what you meant was the following: $objectFoo = new MyObject(); $objectFee = &$objectFoo; unset( $objectFoo ); Then the object shouldn't be deleted since $objectFee is still referencing it. You will just break the reference. Correct me if I'm wrong *chuckle* Cheers, Rob. -- .-. | Robert Cummings | :-`. | Webdeployer - Chief PHP and Java Programmer | :--: | Mail : mailto:[EMAIL PROTECTED] | | Phone : (613) 731-4046 x.109 | :--: | Website : http://www.webmotion.com | | Fax : (613) 260-9545 | `--' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] unsetting object references
Hey, sorry to bother you all but I have another obscure question about objects in PHP (yes I really do care about the answer)... I'm simply wondering if I unset() a reference to an object, whether or not it destroys that object, if there are other references to it that still exist. $_SESSION['object'] = serialize($object); (in another script:) $object = unserialize($_SESSION['object']); // do some stuff with $object unset($object); What's going on with my $_SESSION['object'] ? Erik Erik Price Web Developer Temp Media Lab, H.H. Brown [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
