SplDoublyLinkedList::__construct

(PHP 5 >= 5.3.0)

SplDoublyLinkedList::__construct — Constructs a new doubly linked list

说明

public SplDoublyLinkedList::__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 #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)
  }
}