以下是一个使用PHP实现链表结构（LLS）的示例，包括创建链表、添加节点、删除节点、遍历链表等基本操作。
1. 创建链表
我们需要定义一个节点类和一个链表类。
```php
class Node {
public $data;
public $next;
public function __construct($data) {
$this->data = $data;
$this->next = null;
}
}
class LinkedList {
private $head;
public function __construct() {
$this->head = null;
}
// 添加节点到链表尾部
public function append($data) {
$newNode = new Node($data);
if ($this->head === null) {
$this->head = $newNode;
} else {
$current = $this->head;
while ($current->next !== null) {
$current = $current->next;
}
$current->next = $newNode;
}
}
// 遍历链表
public function traverse() {
$current = $this->head;
while ($current !== null) {
echo $current->data . ' ';
$current = $current->next;
}
echo "
