致命错误：未捕获的错误：在bool上调用成员函数fetchAll（）

Question

我正在开发一个网站，它在xammp和mysql上可以在本地正常运行，但是当我尝试使其连接到远程mysql服务器时，它将引发此错误：

致命错误：未捕获错误：在bool上调用成员函数fetchAll（）

远程连接数据库时不会抛出错误，但是我没有得到任何数据。

class Database
{
    public $DB_SERVER;
    public $DB_USER;
    public $DB_PASSWORD;
    public $DB_DATABASE;

    public function __construct()
    {
        # set the connection variables

        $this->DB_SERVER = ''; // contents removed for post
        $this->DB_USER = '';
        $this->DB_PASSWORD = '';
        $this->DB_DATABASE = '';
    }

    public function getConnection()
    {
        $dataSourceName = 'mysql:dbname='.$this->DB_DATABASE.';host='.$this->DB_SERVER;
        $dbConnection = null;
        try
        {
            $dbConnection = new PDO($dataSourceName, $this->DB_USER, $this->DB_PASSWORD);
        }
        catch(PDOExecption $err)
        {
            echo 'Connection failed: ', $err->getMessage();
        }
        return $dbConnection;
    }

    public function vw_productsForSale()
    {
        $connection = $this->getConnection();
        $sql = "SELECT * FROM vw_productsForSale";
        $statement = $connection->query($sql);
        try{
            $rowSet = $statement->fetchAll(PDO::FETCH_ASSOC);
        }
        catch(PDOExecption $err)
        {
            echo 'Connection failed: ', $err->getMessage();
        }

        $statement = null;
        $connection = null;

        return $rowSet;
    }