Example code for implementing singly linked list in php_PHP tutorial

//链表节点
class node {
public $id; //节点id
public $name; //节点名称
public $next; //下一节点

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

//单链表
class singelLinkList {
    private $header; //链表头节点
   

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

    //获取链表长度
    public function getLinkLength() {
        $i = 0;
        $current = $this->header;
        while ( $current->next != null ) {
            $i ++;
            $current = $current->next;
        }
        return $i;
    }

    //添加节点数据
    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;
    }

    //删除链表节点
    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=" . $id . "的节点！
($current->next == null) {
              echo ("The linked list is empty!");
                                                                                                                                                                                                                                                                       worse worse worse worse ->next->next == null) {
                                                                                                  
/ /Get the node name
public function getLinkNameById($id) {
$current = $this->header;
if ($current->next == null) {
echo "Linked list For empty! "; Return;
}
While ($ Current- & GT; Next! = Null) {
if ($ Current- & GT; ID == $ ID) {
BREAK; }
$ Current = $ Current- & GT; Next;
}
Return $ Current- & GT; name;
}

// Update node name
public function updateLink($id, $name) {
$current = $this->header;
if ($current->next == null) {
echo "The linked list is empty !";
return;
}
while ( $current->next != null ) {
if ($current->id == $id) {
break ;
                                                                                                                                                                                                                                     
$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 "
-----------Delete node--------------
";
$lists->delLink (5);
$lists->getLinkList ();

echo "
----------Update node name--------------
";
$lists-> ;updateLink ( 3, "222222" );
$lists->getLinkList ();

echo "
-----------Get node name--------------
";
echo $lists- >getLinkNameById (5);

echo "
-----------Get the length of the linked list--------------
";
echo $lists- >getLinkLength ();
?>