SplDoublyLinkedList::unshift

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

SplDoublyLinkedList::unshift — Prepends the doubly linked list with an element

Description

public SplDoublyLinkedList::unshift(mixed $value): void

Prepends value at the beginning of the doubly linked list.

Parameters

value: The value to unshift.

Return Values

No value is returned.

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User Contributed Notes 1 note

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lincoln dot du dot j at gmail dot com ¶

7 years ago

$dll = new SplDoublyLinkedList();
$dll->push(2);
$dll->push(3);
$dll->unshift(5); / add 5 beginning of the array
$dll->rewind();

while($dll->valid()){
    echo $dll->current()."\n";
    $dll->next();
}

Output 

5
2
3

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