PHP Conference Japan 2024

SplDoublyLinkedList::add

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

SplDoublyLinkedList::addAdd/insert a new value at the specified index

Опис

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.

Параметри

index

The index where the new value is to be inserted.

value

The new value for the index.

Значення, що повертаються

Не повертає значень.

Помилки/виключення

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

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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
$a = new SplDoublyLinkedList;
$arr=[1,2,3,4,5,6,7,8,9];

for($i=0;$i<count($arr);$i++){
$a->add($i,$arr[$i]);
}

print_r($a);

//Output:

SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
[5] => 6
[6] => 7
[7] => 8
[8] => 9
)

)
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