PHP单链表的实现代码

<?php/*** 单链表*/ class Demo{private $id;public $name;public $next;public function __construct ($id = '', $name = ''){$this->id = $id;$this->name = $name;}static public function show ($head){$cur = $head;while ($cur->next) {echo $cur->next->id,'###',$cur->next->name,'<br />';$cur = $cur->next;}echo '<hr />';}//尾插法static public function push ($head, $node){$cur = $head;while (NULL != $cur->next) {$cur = $cur->next;}$cur->next = $node;return $head;}static public function insert($head, $node){$cur = $head;while (NULL != $cur->next) {if ($cur->next->id > $node->id) {break;}$cur = $cur->next;}$node->next = $cur->next;$cur->next = $node;return $head;}static public function edit($head, $node){$cur = $head;while (NULL != $cur->next) {if ($cur->next->id == $node->id) {break;}$cur = $cur->next;}$cur->next->name = $node->name;return $head; }static public function pop ($head, $node){$cur = $head;while (NULL != $cur->next) {if ($cur->next == $node) {break;}$cur = $cur->next;}$cur->next = $node->next;return $head; }}$team = new Demo();$node1 = new Demo(1, '唐三藏');Demo::push($team, $node1);$node1->name = '唐僧';Demo::show($team);// Demo::show($team);$node2 = new Demo(2, '孙悟空');Demo::insert($team, $node2);// Demo::show($team);$node3 = new Demo(5, '白龙马');Demo::push($team, $node3);// Demo::show($team);$node4 = new Demo(3, '猪八戒');Demo::insert($team, $node4);// Demo::show($team);$node5 = new Demo(4, '沙和尚');Demo::insert($team, $node5);// Demo::show($team);$node4->name = '猪悟能';//php对象传引用，所以Demo::edit没有必要// unset($node4);// $node4 = new Demo(3, '猪悟能');// Demo::edit($team, $node4);Demo::pop($team, $node1);Demo::show($team);