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<?php var_dump(unserialize("O:19:\"SplDoublyLinkedList\":0:{}"));
Output for 5.4.29, 5.6.7 - 7.1.0
Warning: Erroneous data format for unserializing 'SplDoublyLinkedList' in /in/XkDQu on line 3 Notice: unserialize(): Error at offset 30 of 31 bytes in /in/XkDQu on line 3 bool(false)
Output for 5.3.0 - 5.4.28, 5.4.30 - 5.5.35
object(SplDoublyLinkedList)#1 (2) { ["flags":"SplDoublyLinkedList":private]=> int(0) ["dllist":"SplDoublyLinkedList":private]=> array(0) { } }
Output for 5.0.0 - 5.2.17
object(__PHP_Incomplete_Class)#1 (1) { ["__PHP_Incomplete_Class_Name"]=> string(19) "SplDoublyLinkedList" }
Output for 4.3.0 - 4.4.9
object(__PHP_Incomplete_Class)(1) { ["__PHP_Incomplete_Class_Name"]=> string(19) "spldoublylinkedlist" }