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代碼如下:

<?php

//鏈表節點
class node {
    public $id; //節點id
    public $name; //節點名稱
    public $next; //下一節點

    public function __construct($id, $name) {
        $this->id = $id;
        $this->name = $name;
        $this->next = null;
    }
}

//單鏈表
class singelLinkList {
private $header; //鏈表頭節點

//構造方法
 public function __construct($id = null, $name = null) {
 $this->header = new node ( $id, $name, null );
 }

 //獲取鏈表長度
 public function getLinkLength() {
 $i = 0;
 $current = $this->header;
 while ( $current->next != null ) {
 $i ++;
 $current = $current->next;
 }
 return $i;
 }

 //添加節點數據
 public function addLink($node) {
 $current = $this->header;
 while ( $current->next != null ) {
 if ($current->next->id > $node->id) {
 break;
 }
 $current = $current->next;
 }
 $node->next = $current->next;
 $current->next = $node;
 }

 //刪除鏈表節點
 public function delLink($id) {
 $current = $this->header;
 $flag = false;
 while ( $current->next != null ) {
 if ($current->next->id == $id) {
 $flag = true;
 break;
 }
 $current = $current->next;
 }
 if ($flag) {
 $current->next = $current->next->next;
 } else {
 echo "未找到id=" . $id . "的節點！ ";
 }
 }

 //獲取鏈表
 public function getLinkList() {
 $current = $this->header;
 if ($current->next == null) {
 echo ("鏈表為空!");
 return;
 }
 while ( $current->next != null ) {
 echo 'id:' . $current->next->id . ' name:' . $current->next->name . " ";
 if ($current->next->next == null) {
 break;
 }
 $current = $current->next;
 }
 }

 //獲取節點名字
 public function getLinkNameById($id) {
 $current = $this->header;
 if ($current->next == null) {
 echo "鏈表為空!";
 return;
 }
 while ( $current->next != null ) {
 if ($current->id == $id) {
 break;
 }
 $current = $current->next;
 }
 return $current->name;
 }

 //更新節點名稱
 public function updateLink($id, $name) {
 $current = $this->header;
 if ($current->next == null) {
 echo "鏈表為空!";
 return;
 }
 while ( $current->next != null ) {
 if ($current->id == $id) {
 break;
 }
 $current = $current->next;
 }
 return $current->name = $name;
 }
}

$lists = new singelLinkList ();
$lists->addLink ( new node ( 5, 'eeeeee' ) );
$lists->addLink ( new node ( 1, 'aaaaaa' ) );
$lists->addLink ( new node ( 6, 'ffffff' ) );
$lists->addLink ( new node ( 4, 'dddddd' ) );
$lists->addLink ( new node ( 3, 'cccccc' ) );
$lists->addLink ( new node ( 2, 'bbbbbb' ) );
$lists->getLinkList ();
echo " -----------刪除節點-------------- ";
$lists->delLink ( 5 );
$lists->getLinkList ();

echo " -----------更新節點名稱-------------- ";
$lists->updateLink ( 3, "222222" );
$lists->getLinkList ();

echo " -----------獲取節點名稱-------------- ";
echo $lists->getLinkNameById ( 5 );

echo " -----------獲取鏈表長度-------------- ";
echo $lists->getLinkLength ();
?>