Re: issues with __sleep() and __wakeup()

On Tue, Jul 31, 2001 at 02:48:48PM -0600, mike cullerton wrote: > on 7/31/01 1:48 PM, scott [gts] at scott@graphictype.com wrote: > > > I am having a problem with __sleep(); > > there mere existance of it is causing my object > > to not get serialized at all. __wakeup() works fine. > > > > i am using PHP v4.0.6 / apache / win2k. > > > > If i keep __sleep() in the object, it will not serialize, > > but if i remove it, it serialized fine. Does anyone > > know why this happens? > > i asked this about a month ago and didn't hear anything. i too have never > been able to get __sleep to work. i think it's because i couldn't figure out > what needed to be returned (or how to return it :) > > at > http://www.php.net/manual/en/language.oop.magic-functions.php it > says > that __sleep is "supposed to return an array with the names of all variables > of that object that should be serialized", but there are no examples of > this. > > in a current project, i have an object that is registed as a session > variable. it contains three objects and an array. one of the objects is a > PEAR db object, and i don't need to serialize it. i do want to maintain the > other two objects and the array. > > i tried a number of ideas inside __sleep, to no avail. without __sleep, it > works. with __sleep, i break it. > > i do use __wakeup to reinitialize my db object, but i just use > $db->disconnect(); at the end of my index file to disconnect . > > does anyone know the proper way to "clean up the object" in __sleep and how > to return the variables that should be serialized? can this even be used > when one (or more) of the variables is an object itself? > see sample - it should be self-explaining. tc <? error_reporting(-1); class test { var $filename; var $mode; var $fd; function test($filename=NULL,$mode=NULL) { echo "------------------constructor called\n"; $this->filename = $filename; $this->mode = $mode; // we could call $this->_wakeup() instead! if ($this->filename && $this->mode) { $this->fd = fopen($this->filename,$this->mode); } } function _sleep() { echo "------------------sleep\n"; // return list of instance-variables to be serialized return array("filename","mode"); } function _wakeup() { echo "------------------wakeup\n"; // all serialized instance variables are set now, inititalize the non-serializeable ones if ($this->filename && $this->mode) { $this->fd = fopen($this->filename,$this->mode); } } } $a = new test("/tmp/thies.tcsh","r"); echo $a; var_dump($a); $b = serialize($a); var_dump($b); $a = unserialize($b); var_dump($a); $b = wddx_serialize_value($a); var_dump($b); $a = wddx_deserialize($b); var_dump($a); ?>