Re: PEAR destructors

Christian Rishøj wrote: > > Att: Stig (among others) > > Christian Rishøj wrote: > > > This leads me to the conclusion, that _after_ the contructer has run, a > > _copy_ of the object is returned by the 'new' command. Therefore the > > reference in $array is not a reference to the object returned by 'new foo'. > > This might seems a bit off topic, but the problem actually applies to > the emulated destructors in PEAR as well. Let's see.... If a derived > class in PEAR calls the PEAR contructor from its own constructor, the > PEAR constructor will add a reference to the object being instanciated > to a > global array: > > /** > * Constructor. Registers this object in > * $_PEAR_destructor_object_list for destructor emulation. > */ > function PEAR() { > global $_PEAR_destructor_object_list; > $_PEAR_destructor_object_list[] = &$this; > if ($this->_debug) { > printf("PEAR constructor called, class=%s\n", > get_class($this)); > } > } > > However, right after being instanciated, the 'new' operator returns a > _copy_ of the object, meaning that when the _PEAR_call_destructors() is > called, the actual object being destructed is not the same as the one > returned by 'new'. > > While the object being detructed is not the same as the one that you > have used in your script, this implies for an example that connections > opened by the object after being instanciated won't get closed. > > If someone does not prove me wrong, this implies that the PEAR > destructors are not very useful for e.g. database objects which makes a > connection after being instanciated and relies on this being closed by > the destructor, as the object being destructed doesn't have a clue of > any connections made. > > Please consider this and share your thoughts. I hope someone will prove > me wrong or enlighten me with a solution, partly because I would really > like to make use of the PEAR emulated destructors, partly due to the > fact > that I am using the same concept in a current project of mine. I'm afraid you're right. I've sent a mail to Andi/Zeev asking for a fix. - Stig