php – PDOStatement::execute(): SQLSTATE[HY093]: Invalid parameter number: parameter was not defined for lastInsertId()-ThrowExceptions

while I want to insert a post, I can’t get the last id and tag id in the database by using the OOP PHP PDO way. how to use lastInsertId() member function in oop PHP?

here is my post.php

       <?php
         include_once('DB.php');
         class Post  
        {
               private $db;

public function __construct()
{
    return $this->db = new DB;
}

public function addPost($tile,$des,$img,$date,$slug)
{
    $this->db->query("INSERT INTO posts (title,description,image,created_at,slug) VALUES (:title,:description,:img,:date,:slug)");
    $this->db->bind(':title',$tile);
    $this->db->bind(':description',$des);
    $this->db->bind(':img',$img);
    $this->db->bind(':date',$date);
    $this->db->bind(':slug',$slug);

    // if ($this->db->execute()) {
    //     echo "Successful";
    // } else {
    //     echo "Failed";
    // }
   $result = $this->db->execute();
   if ($result) {
       if ($_POST['tags']) {
           $tags = $_POST['tags'];
           $lastInsertedId = $this->db->lastInsertId();
           foreach ($tags as $tag ) {
               $this->db->query("INSERT INTO post_tags (post_id, tag_id) VALUES (:postId,:tagId)");
               $this->db->bind(':postID',$lastInsertedId);
               $this->db->bind(':tagId',$tag);
               $this->db->execute();
           }
       }
   }
   return $result;
}


public function getPost()
{
    $this->db->query("SELECT * FROM posts");
    return $result = $this->db->resultset();
}

function getSinglePost($slug){
    $this->db->query("SELECT * FROM posts WHERE slug = :slug");
    $this->db->bind(':slug',$slug);
    return $result = $this->db->resultset();
}}?>

and my db.php is

  <?php
  require_once('config/config.php');

      class DB
       {
       private $host = DB_HOST;
       private $user = DB_USER;
       private $password = DB_PWD;
       private $dbname = DB_NAME;

private $connection, $error, $stmt, $dbconnected = false;

public function __construct()
{
    $dsn = 'mysql:host=' . $this->host . ';dbname=' . $this->dbname;
    $option = array(
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_PERSISTENT => true
    );

    try {
        $this->connection = new PDO($dsn, $this->user, $this->password);
        $this->dbconnected = true;
    } catch (PDOException $e) {
        $this->error = $e->getMessage();
        $this->dbconnected = false;
    }
}

public function getError()
{
    return $this->error;
}

public function isConnected()
{
    return $this->dbconnected;
}

public function query($query)
{
    $this->stmt = $this->connection->prepare($query);

}

public function lastInsertId()
{
    return  $this->connection->lastInsertId();
}

public function execute()
{
    return $this->stmt->execute();
}


public function resultset()
{
    $this->execute();
    return $this->stmt->fetchAll(PDO::FETCH_OBJ);
}

public function rowCount()
{
    return $this->stmt->rowCount();
}

public function single()
{
    $this->execute();
    return $this->stmt->fetch(PDO::FETCH_OBJ);
}

public function bind($param, $value, $type = null)
{
    if (is_null($type)) {
        switch (true) {
            case is_int($value):
                $type = PDO::PARAM_INT;
                break;
            case is_bool($value):
                $type = PDO::PARAM_BOOL;
                break;
            case is_null($value):
                $type = PDO::PARAM_NULL;
                break;
            default:
                $type = PDO::PARAM_STR;
                break;
        }
    }

    $this->stmt->bindValue($param, $value, $type);
}}

I can’t configure lastInsertId() function and this occurred problems when $lastInsertedId = $this->db->lastInsertId(); variable can’t binding postID from $_POST request