note 11320 added to Classes and Objects

I must be missing something, because I can't find any references in the documentation to two items: 1. Class Destructors - this is called when an object goes out of scope or is deallocated. 2. How to cause a constructor to fail. For example, if I want to have a constructor function that opens a file, but the fopen() command fails, I might want the constructor function to somehow return NULL or 0 or something that would indicate that the construction of the object failed. Any information on these two items? Thanks. http://www.php.net/manual/en/language.oop.php