SplDoublyLinkedList::offsetExists
(PHP 5 >= 5.3.0)
SplDoublyLinkedList::offsetExists — Returns whether the requested $index exists
说明
public bool SplDoublyLinkedList::offsetExists
( mixed $index
)
参数
-
index
-
The index being checked.
返回值
TRUE
if the requested index
exists, otherwise FALSE