PHP - Manual: SplDoublyLinkedList::offsetExists
2025-02-26
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplDoublyLinkedList::offsetExists — Returns whether the requested $index exists
index
The index being checked.
官方地址:https://www.php.net/manual/en/spldoublylinkedlist.offsetexists.php