SplDoublyLinkedList::count
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::count — Counts the number of elements in the doubly linked list
说明
public SplDoublyLinkedList::count(): int
参数
此函数没有参数。
返回值
Returns the number of elements in the doubly linked list.
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