#50793 [Ver]: Note about not being able to serialize internal objects needs clarifiaction

ID: 50793 User updated by: weirdan at gmail dot com Reported By: weirdan at gmail dot com Status: Verified Bug Type: Documentation problem PHP Version: 5.3.1 New Comment: It's not that simple. For example ArrayObject in 5.3.1 does implement Serializable, but it did not back in 5.2.12 (latest stable 5.2) - and yet serialize/unserialize worked on it quite well: weirdan@virtual-debian:/home/sam/trunk$ sudo update-alternatives --set php /usr/bin/php5 update-alternatives: using /usr/bin/php5 to provide /usr/bin/php (php) in manual mode. weirdan@virtual-debian:/home/sam/trunk$ php -r 'var_dump(phpversion()); $c = new ReflectionClass("ArrayObject"); var_dump("is internal", $c->isInternal()); $q = new ArrayObject(array(1,2,3)); $w = unserialize(serialize($q)); assert("\$q[1] == \$w[1]"); var_dump("past assert"); var_dump("has __sleep or __wakeup", $c->hasMethod("__sleep") or $c->hasMethod("__wakeup")); var_dump("implements Serializable", $c->implementsInterface("Serializable"));' string(8) "5.2.12-2" string(11) "is internal" bool(true) string(11) "past assert" string(23) "has __sleep or __wakeup" bool(false) string(23) "implements Serializable" bool(false) weirdan@virtual-debian:/home/sam/trunk$ Previous Comments: ------------------------------------------------------------------------ [2010-01-18 19:33:53] bjori@php.net $ php -n -r '$d = new DOMDocument("1.0", "UTF-8"); $s = serialize($d); var_dump(unserialize($s)->encoding, $d->encoding);' Warning: Unknown: Invalid State Error in Command line code on line 1 NULL string(5) "UTF-8" See bug#30323 && http://svn.php.net/viewvc/phpdoc/en/trunk/reference/var/functions/seri alize.xml?r1=164053&r2=172271 I guess the simplest way to fix this is to say something along the lines of "classes that do not implement Serializable or the __sleep()/__wakeUp() functions cannot be reliably serialized"? ------------------------------------------------------------------------ [2010-01-18 19:16:09] weirdan at gmail dot com Description: ------------ Manual says 'It is not possible to serialize PHP built-in objects', however some of internal classes support serialization: weirdan@virtual-debian:/home/sam/trunk$ php -r 'var_dump(phpversion()); $c = new ReflectionClass("ArrayObject"); var_dump("is internal", $c->isInternal()); $q = new ArrayObject(); var_dump(serialize($q));' string(5) "5.3.1" string(11) "is internal" bool(true) string(45) "C:11:"ArrayObject":21:{x:i:0;a:0:{};m:a:0:{}}" weirdan@virtual-debian:/home/sam/trunk$ Reproduce code: --------------- --- From manual page: function.serialize#Notes --- See description Expected result: ---------------- Explicitly list serializable/non-serializable classes for extensions enabled by default (possibly in appendix). Actual result: -------------- The note is misleading. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=50793&edit=1