(PHP 5 >= 5.3.0, PHP 7)
SplDoublyLinkedList::__construct — Constructs a new doubly linked list
This constructs a new empty doubly linked list.
此函数没有参数。
没有返回值。
Example #1 SplDoublyLinkedList::__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)
}
}