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    PHP Manual»Datastructures»SplDoublyLinkedList

    SplDoublyLinkedList 类

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

    SplDoublyLinkedList 类提供双向链表的主要功能。

    class SplDoublyLinkedList implements Iterator, Countable, ArrayAccess, Serializable {
    /* 常量 */
    public const int IT_MODE_LIFO;
    public const int IT_MODE_FIFO;
    public const int IT_MODE_DELETE;
    public const int IT_MODE_KEEP;
    /* 方法 */
    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
    }
    SplDoublyLinkedList::IT_MODE_LIFO

    列表将以先进后出的顺序迭代，就像栈一样。

    SplDoublyLinkedList::IT_MODE_FIFO

    列表将以先进先出的顺序迭代，就像队列一样。

    SplDoublyLinkedList::IT_MODE_DELETE

    迭代将移除已迭代的元素。

    SplDoublyLinkedList::IT_MODE_KEEP

    迭代将不会移除已迭代的元素。

    版本 说明
    8.4.0 类常量现在是有类型的。

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