undefined方法PDO lastInsertId

Question

我有一个插入查询,我想从表中获取ID.我一直在搜索,我找到了PDO的lastInsertId().当我想使用它时,我得到PHP错误.

这是我的代码:

$db = new database();
$naam = $db->quoteQuery($_POST['naam']);
$barcode = $db->quoteQuery($_POST['barcode']);
$sql = "INSERT INTO products(name, barcode) VALUES (".$name.",".$barcode.")";
$results = $db->executeQuery($sql);
$lastid = $results->lastInsertId();

但这给出了一个错误,这个错误:

Fatal error: Call to undefined method PDOStatement::lastInsertId() in /home/onlineweuh/domains/onlinewebapps.nl/public_html/vsb/admin/add-product.class.php on line 297

我的数据库类:

    class database 
{
    private $handleDB;
    public function __construct()
    {
        $host = ;
        $user = ;
        $database = ;
        $password = ;
        try
        {
            $this->handleDB = new PDO('mysql:host='.$host.';dbname='.$database, $user, $password);
        }
        catch (PDOException $e)
        {
            print_r($e);
        }

        $this->handleDB->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
    }

我希望有人可以帮我解决它,我想要插入Query时给出的ID.

Answer 1

您从PDO对象获取lastinsertid而不是结果对象.

尝试 $db->lastInsertId()

编辑如下.

您的数据库类封装了handleDB/PDO对象.由于handleDB变量是私有的,因此您无法在类外部访问它.您需要将其公之于众;

class database 
{
    public $handleDB;
    public function __construct()
    {
        $host = 'removed';
        $user = 'removed';
        $database = 'removed';
        $password = 'removed';
        try
        {
            $this->handleDB = new PDO('mysql:host='.$host.';dbname='.$database, $user, $password);
        }
        catch (PDOException $e)
        {
            print_r($e);
        }

        $this->handleDB->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
    }

}

现在你可以打电话了 $db->handleDB->lastInsertId();

或者您可以将其公开为handleDB->lastInsertId()如下函数:

class database 
{
    private $handleDB;
    public function __construct()
    {
        $host = 'remove';
        $user = 'removed';
        $database = 'removed';
        $password = 'removed';
        try
        {
            $this->handleDB = new PDO('mysql:host='.$host.';dbname='.$database, $user, $password);
        }
        catch (PDOException $e)
        {
            print_r($e);
        }

        $this->handleDB->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
    }

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

}

你会打电话使用 $db->lastInsertId();

Answer 2

lastInsertId是一种方法PDO,而不是PDOStatement.因此:

$db->lastInsertId();