Bug #65151 [Com]: DateTime subclasses cant use custom serializer

Edit report at https://bugs.php.net/bug.php?id=65151&edit=1 ID: 65151 Comment by: seth dot johnson+phpnet at gmail dot com Reported by: mike at silverorange dot com Summary: DateTime subclasses cant use custom serializer Status: Open Type: Bug Package: Date/time related Operating System: CentOS or RHEL PHP Version: 5.3.26 Block user comment: N Private report: N New Comment: This is not a bug. An unserialize implementation is responsible for properly constructing the entire object and that includes calling its parent's constructor if that would normally be necessary. You would have the same problem if you overrode DateTime's constructor and did not call parent::__construct. It's fairly easy to address in code though. Just call the parent's constructor in unserialize, e.g. public function unserialize($data) { parent::__construct(null); $data = unserialize($data); $this->setTimestamp($data[0]); $this->setTimezone(new DateTimeZone($data[1])); } Previous Comments: ------------------------------------------------------------------------ [2013-06-27 21:18:47] mike at silverorange dot com Description: ------------ If a DateTime subclass implements Serializable it cant be unserialized. A PHP warning is raised when restoring the time zone is attempted. Test script: --------------- class MyDate extends DateTime implements Serializable { public function serialize() { $data = array( $this->getTimestamp(), $this->dateTimezone()->getName() ); return serialize($data); } public function unserialize($data) { $data = unserialize($data); $this->setTimestamp($data[0]); $this->setTimezone(new DateTimeZone($data[1])); } } $d = new MyDate('2013-01-01', new DateTimeZone('UTC')); echo unserialize(serialize($d))->format('c'); Expected result: ---------------- 2013-01-01T00:00:00+00:00 Actual result: -------------- Warning: DateTime::setTimezone(): The DateTime object has not been correctly initialized by its constructor ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=65151&edit=1