PHP Manual
SplDoublyLinkedList
Returns whether the requested $index exists

SplDoublyLinkedList::offsetExists

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SplDoublyLinkedList::offsetExists — Returns whether the requested $index exists

Description

public SplDoublyLinkedList::offsetExists(int $index): bool

Parameters

index: The index being checked.

Return Values

true if the requested index exists, otherwise false

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