PHP中模拟链表和链表的基本操作示例

模拟链表：

<?php
/**
 * PHP实现链表的基本操作
 */
class linkList {
  /**
   * 姓名
   * @var string
   */
  public $name = '';

  /**
   * 编号
   * @var int
   */
  public $id = 0;

  /*
   * 引用下一个对象
   */
  public $next = null;

  /**
   * 构造函数初始化数据
   * @param int $id
   * @param string $name
   */
  public function __construct($id = 0, $name = '') {
    $this->name = $name;
    $this->id  = $id;
  }

  /**
   * 遍历链表
   */
  public static function echo_link_list($head) {
    $curr = $head;
    while ($curr->next != null) {
      echo '姓名:'.$curr->next->name, ' 编号:'.$curr->next->id;
      echo '<br>';
      $curr = $curr->next;
    }
  }

  /**
   * 添加新节点
   */
  public static function add($head, $id, $name) {
    $curr = $head;
    $obj = new linkList($id, $name);

    while ($curr->next != null) {
      // 如果当前ID < 下一个ID,则添加到中间，添加节点到指定顺序位置
      if ($curr->next->id > $id) {

        $obj->next = $curr->next;
        $curr->next = $obj;

        return true;
      } else if ($curr->next->id == $id) {

        echo '当前Id:'.$id.'重复了，请不要继续添加了！';
        echo '<br>';

        return false;
      }
      $curr = $curr->next;
    }
    // 添加节点到尾部
    if ($curr->next == null) {
      $curr->next = $obj;
    }
  }

  /**
   * 删除节点
   */
  public static function del($head, $id) {
    $curr = $head;

    while($curr->next != null) {
      if ($curr->next->id == $id) {
        $curr->next = $curr->next->next;
        return true;
      }
      $curr = $curr->next;
    }
  }

  /**
   * 修改节点
   */
  public static function edit($head, $id, $new_name) {
    $curr = $head;

    while($curr->next != null) {
      if ($curr->next->id == $id) {
        $curr->next->name = $new_name;
      }
      $curr = $curr->next;
    }
  }
}

$head = new linkList();
linkList::add($head, 1, 'wangdk');
linkList::add($head, 2, 'sunshuzhen');
linkList::add($head, 8, 'wanghaha');
linkList::add($head, 6, 'wangchufen');
linkList::add($head, 6, 'wangchufen');
linkList::add($head, 3, 'wangdaye');

linkList::del($head, 1);
linkList::edit($head, 2, 'hahaha');
linkList::echo_link_list($head);

?>

链表的增删查改：

<?php
/**
 * PHP实现链表的基本操作
 */
class linkList {
  /**
   * 姓名
   * @var string
   */
  public $name = '';

  /**
   * 编号
   * @var int
   */
  public $id = 0;

  /*
   * 引用下一个对象
   */
  public $next = null;

  /**
   * 构造函数初始化数据
   * @param int $id
   * @param string $name
   */
  public function __construct($id = 0, $name = '') {
    $this->name = $name;
    $this->id  = $id;
  }

  /**
   * 遍历链表
   */
  public static function echo_link_list($head) {
    $curr = $head;
    while ($curr->next != null) {
      echo '姓名:'.$curr->next->name, ' 编号:'.$curr->next->id;
      echo '<br>';
      $curr = $curr->next;
    }
  }

  /**
   * 添加新节点
   */
  public static function add($head, $id, $name) {
    $curr = $head;
    $obj = new linkList($id, $name);

    while ($curr->next != null) {
      // 如果当前ID < 下一个ID,则添加到中间，添加节点到指定顺序位置
      if ($curr->next->id > $id) {

        $obj->next = $curr->next;
        $curr->next = $obj;

        return true;
      } else if ($curr->next->id == $id) {

        echo '当前Id:'.$id.'重复了，请不要继续添加了！';
        echo '<br>';

        return false;
      }
      $curr = $curr->next;
    }
    // 添加节点到尾部
    if ($curr->next == null) {
      $curr->next = $obj;
    }
  }

  /**
   * 删除节点
   */
  public static function del($head, $id) {
    $curr = $head;

    while($curr->next != null) {
      if ($curr->next->id == $id) {
        $curr->next = $curr->next->next;
        return true;
      }
      $curr = $curr->next;
    }
  }

  /**
   * 修改节点
   */
  public static function edit($head, $id, $new_name) {
    $curr = $head;

    while($curr->next != null) {
      if ($curr->next->id == $id) {
        $curr->next->name = $new_name;
      }
      $curr = $curr->next;
    }
  }
}

$head = new linkList();
linkList::add($head, 1, 'wangdk');
linkList::add($head, 2, 'sunshuzhen');
linkList::add($head, 8, 'wanghaha');
linkList::add($head, 6, 'wangchufen');
linkList::add($head, 6, 'wangchufen');
linkList::add($head, 3, 'wangdaye');

linkList::del($head, 1);
linkList::edit($head, 2, 'hahaha');
linkList::echo_link_list($head);

?>