note 73548 added to language.oop5.magic

I am buggered if I know how to make __sleep() work. If there are private members in base classes, it seems impossible to get them saved. Example: serializing x will save and restore the a_priv variable class a { private $a_priv } ; class b extends a {} ; x = new b() ; but add a __sleep() function to class b, which should return an array of variables to save, function __sleep(){ return array( "a_priv" ) ; } does not work. I have tried heaps of things e.g. array_keys((array)$this) as suggested below, get_object_vars(), get_class_vars() but cannot get that damned private variable saved. As a side note, also watch out for variables containing references when serializing classes!! ---- Server IP: 203.220.0.234 Probable Submitter: 220.237.187.216 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.magic.php Edit -- https://master.php.net/note/edit/73548 Del: integrated -- https://master.php.net/note/delete/73548/integrated Del: useless -- https://master.php.net/note/delete/73548/useless Del: bad code -- https://master.php.net/note/delete/73548/bad+code Del: spam -- https://master.php.net/note/delete/73548/spam Del: non-english -- https://master.php.net/note/delete/73548/non-english Del: in docs -- https://master.php.net/note/delete/73548/in+docs Del: other reasons-- https://master.php.net/note/delete/73548 Reject -- https://master.php.net/note/reject/73548 Search -- https://master.php.net/manage/user-notes.php