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Dieses Dokument verwendet PHP-Handbuch für chinesische Websites Freigeben
(PHP 5 >= 5.3.0)
SplDoublyLinkedList::valid — Check whether the doubly linked list contains more nodes
Checks if the doubly linked list contains any more nodes.
此函数没有参数。
Returns TRUE
if the doubly linked list contains any more nodes, FALSE
otherwise.