SplDoublyLinkedList::__construct()

(PHP 5 >= 5.3.0, PHP 7)

Constructs a new doubly linked list

说明

publicSplDoublyLinkedList::__construct(void)

This constructs a new empty doubly linked list.

参数

此函数没有参数。

返回值

没有返回值。

范例

Example #1SplDoublyLinkedList::__construct()example

<?php
$dll = new SplDoublyLinkedList();
$dll->push(2);
$dll->push(3);
$dll->unshift(5);
var_dump($dll);
?>

以上例程会输出：

object(SplDoublyLinkedList)#1 (2) {
  ["flags":"SplDoublyLinkedList":private]=>
  int(0)
  ["dllist":"SplDoublyLinkedList":private]=>
  array(3) {
    [0]=>
    int(5)
    [1]=>
    int(2)
    [2]=>
    int(3)
  }
}