#18662 [Fbk->Opn]: unserialize returns false if some element is empty

ID: 18662 User updated by: to@andybutkaj.com Reported By: to@andybutkaj.com -Status: Feedback +Status: Open Bug Type: Strings related Operating System: Windows 2000 and Windows XP PHP Version: 4.2.2 New Comment: i cannot attach full example, it is client-server communication, where client make the serialized string in php rules for php. Serialized string in earlier versions of php (e.g 4.0.6) may contain wrong sequenction (i:; what mean integer with nothing value), while this version (4.2.2) dont support this. You cannot make php serialized string with something like this, integer is followed by number always. Everything what i wanted is explain the differences. When i was opening the bug i dont know them. (i think it is helpful) For me, it is more bug for earlier version than bug for this version php. My question is, can i close the status? This is no bug for me anymore... Previous Comments: ------------------------------------------------------------------------ [2002-07-31 18:08:49] sniper@php.net Please attach the full example, in which you serialize and unserialize the variables. Just adding some random, supposedly serialized string is not very helpful. ------------------------------------------------------------------------ [2002-07-31 08:14:42] to@andybutkaj.com sorry, my serialized array is not correct (i edit this array to not to be so long), your example work for me, but still some differences in work with serialized string I found this in serialized string. php 4.0.6 ...array_key;s:3:"txt" -> serialized string - work ...array_key;s:0:"" -> string withour value - work ...array_key;i:1; -> serialized integer - work ...array_key;i:; -> integer without value - work php 4.2.2 ...array_key;s:3:"txt" -> serialized string - work ...array_key;s:0:"" -> string withour value - work ...array_key;i:1; -> serialized integer - work ...array_key;i:; -> integer without value - FALSE this correspond to this unworking array (4.2.2), working (4.0.6) with integer without values: a:1:{s:3:"fas";a:6:{s:10:"mkey_index";s:3:"fas";s:9:"save_type";i:1;s: 6:"German";i:;s:7:"English";i:;s:6:"Slovak";i:;s:5:"Czech";i:;}} ___________________________________________________________ I don't know if this is bug, now. I can't create this array with declaration array( ... ). In strict rules it is not bug, it is correct work. Only backwards compatibility maybe. Thank you for solve this problem! ------------------------------------------------------------------------ [2002-07-31 07:03:37] nohn@php.net Could verify this with PHP 4.3.0-dev 2002-07-31 on Compaq Tru64: $test_array = 'a:1:{s:12:"fas";a:6:{s:10:"mkey_index";s:12:"fas";s:9:"save_typ e";i:1;s:6:"German";i:;s:7:"English";i:;s:6:"Slovak";i:;s:5:"Czech";i:;}}'; $result_array = unserialize($test_array); print_r($result_array); Returns nothing. On the same machine this works: $array = array(1,2,3,9,7,4,5,12,"lala"=>array("test"=>1,2,3,3)); $serialized_array = serialize($array); print_r($serialized_array); $result_array = unserialize($serialized_array); print_r($array); print_r($result_array); Results as expected in: Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 9 [4] => 7 [5] => 4 [6] => 5 [7] => 12 [lala] => Array ( [test] => 1 [0] => 2 [1] => 3 [2] => 3 ) ) Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 9 [4] => 7 [5] => 4 [6] => 5 [7] => 12 [lala] => Array ( [test] => 1 [0] => 2 [1] => 3 [2] => 3 ) ) Are you shure, your serialized Array is correct? ------------------------------------------------------------------------ [2002-07-31 06:30:37] to@andybutkaj.com I try unserialize array and everything goes nice when the array has all elements filled. When one of element is empty unserialize returns false More specific: PHP 4.0.6 """"""""" a:1:{s:12:"fas";a:6:{s:10:"mkey_index";s:12:"fas";s:9:"save_type";i:1;s:6:"German";i:;s:7:"English";i:;s:6:"Slovak";i:;s:5:"Czech";i:;}} unserialize returns array where empty elements are replaced by 0 ___________________________________________________________ PHP 4.2.2 """"""""" a:1:{s:12:"fas";a:6:{s:10:"mkey_index";s:12:"fas";s:9:"save_type";i:1;s:6:"German";i:;s:7:"English";i:;s:6:"Slovak";i:;s:5:"Czech";i:;}} unserialize returns false (if no empty elements, unserialize returns correct array) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=18662&edit=1