Php/docs/spldoublylinkedlist.offsetexists
From Get docs
SplDoublyLinkedList::offsetExists
(PHP 5 >= 5.3.0, PHP 7)
SplDoublyLinkedList::offsetExists — Returns whether the requested $index exists
Description
public SplDoublyLinkedList::offsetExists
( mixed $index
) : bool
Parameters
index- The index being checked.
Return Values
TRUE if the requested index exists, otherwise FALSE
