note 95123 added to class.splobjectstorage

I have two things to note about SplObjectStorage: #1: A reference to the object itself is stored (not just a hash to compare against the object) and it must be removed before the object is destroyed and the destructor is executed. #2: SplObjectStorage::rewind() MUST be called to initiate the iterator and before SplObjectStorage::current() will return an object (and I think the only way to retrieve an object?) rather than automatically starting at the first element as I expected it to, like an array for example. This assumption is based on SplObjectStorage::current() returning NULL until SplObjectStorage::rewind() is called once the objects are contained. As a note, always use REWIND before iterating through or fetching objects. <?php class foo { public function __destruct() { print("--- DESTRUCTOR FIRED!!<br />\r\n"); } } # Create object and storage $bar = new foo(); $s = new SplObjectStorage(); # Rewind early just as a test $s->rewind(); # attach the object $s->attach($bar, array('test')); # Unset the object; destructor does NOT fire unset($bar); print("Object has been unset<br />\r\n"); # First demonstrate that REWIND must be called to initialize the iterator $obj = $s->current(); var_dump($obj); print("- Note the NULL (from \$s->current())<br />\r\n"); # Initialize, and then detach the current (and only) object $s->rewind(); $s->detach( $s->current() ); # The destructor should NOW execute ?> Output: Object has been unset NULL - Note the NULL (from $s->current()) --- DESTRUCTOR FIRED!! ---- Server IP: 69.147.83.197 Probable Submitter: 76.167.60.11 ---- Manual Page -- http://www.php.net/manual/en/class.splobjectstorage.php Edit -- https://master.php.net/note/edit/95123 Del: integrated -- https://master.php.net/note/delete/95123/integrated Del: useless -- https://master.php.net/note/delete/95123/useless Del: bad code -- https://master.php.net/note/delete/95123/bad+code Del: spam -- https://master.php.net/note/delete/95123/spam Del: non-english -- https://master.php.net/note/delete/95123/non-english Del: in docs -- https://master.php.net/note/delete/95123/in+docs Del: other reasons-- https://master.php.net/note/delete/95123 Reject -- https://master.php.net/note/reject/95123 Search -- https://master.php.net/manage/user-notes.php