PHP 单链表

<?php
 class Hero {
 public $no;
 public $name;
 public $nickname;
 public $next=null; public function __construct($no="",$name="",$nickname=""){  $this->no = $no;
  $this->name = $name;
  $this->nickname = $nickname; }
 } $head = new Hero(); $hero1 = new Hero(1,'宋江','及时雨');
 $head->next = $hero1;
 $hero2 = new Hero(2,'卢俊义','玉麒麟');
 $hero1->next = $hero2; function addhero($head,$hero){ } function showhero($head){
 $cur = $head; while($cur->next!=null){
 echo '<br/>编号'.$cur->next->no.'name'.$cur->next->name.'nickname'.$cur->next->nickname;
 $cur = $cur->next;
 } }
 showhero($head);?>