The SplDoublyLinkedList class

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

Einführung

The SplDoublyLinkedList class provides the main functionalities of a doubly linked list.

Klassenbeschreibung

class SplDoublyLinkedList implements Iterator, Countable, ArrayAccess, Serializable {
/* Konstanten */
public const int IT_MODE_LIFO;
public const int IT_MODE_FIFO;
public const int IT_MODE_DELETE;
public const int IT_MODE_KEEP;
/* Methoden */
public function add(int $index, mixed $value): void
public function bottom(): mixed
public function count(): int
public function current(): mixed
public function getIteratorMode(): int
public function isEmpty(): bool
public function key(): int
public function next(): void
public function offsetExists(int $index): bool
public function offsetGet(int $index): mixed
public function offsetSet(?int $index, mixed $value): void
public function offsetUnset(int $index): void
public function pop(): mixed
public function prev(): void
public function push(mixed $value): void
public function rewind(): void
public function serialize(): string
public function setIteratorMode(int $mode): int
public function shift(): mixed
public function top(): mixed
public function unserialize(string $data): void
public function unshift(mixed $value): void
public function valid(): bool
}

Vordefinierte Konstanten

Iteration Direction

SplDoublyLinkedList::IT_MODE_LIFO

The list will be iterated in a last in, first out order, like a stack.

SplDoublyLinkedList::IT_MODE_FIFO

The list will be iterated in a first in, first out order, like a queue.

Iteration Behavior

SplDoublyLinkedList::IT_MODE_DELETE

Iteration will remove the iterated elements.

SplDoublyLinkedList::IT_MODE_KEEP

Iteration will not remove the iterated elements.

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