PHP Manual
SplDoublyLinkedList
Add/insert a new value at the specified index

SplDoublyLinkedList::add

(PHP 5 >= 5.5.0, PHP 7, PHP 8)

SplDoublyLinkedList::add — Add/insert a new value at the specified index

Description

public SplDoublyLinkedList::add(int $index, mixed $value): void

Insert the value value at the specified index, shuffling the previous value at that index (and all subsequent values) up through the list.

Parameters

index: The index where the new value is to be inserted.
value: The new value for the index.

Return Values

No value is returned.

Errors/Exceptions

Throws OutOfRangeException when index is out of bounds or when index cannot be parsed as an integer.

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