razorflow使用过程中提示RFComponent不存在

<?phprequire_once("razorflow_php\lib\core\StandaloneDashboard.php");require_once("razorflow_php\lib\components\TableComponent.php");class SampleDashboard extends StandaloneDashboard {    public function buildDashboard () {        $table = new TableComponent('table1');        $table->setCaption("Regional Sales");        $table->setDimensions (4, 4);        $table->setRowsPerPage (8);        $table->addColumn('zone', "Zone");        $table->addColumn('name', "Store Name");        $table->addColumn('sale', "Sales Amount", array(          "dataType" => "number",          "numberPrefix" => "$ ",          "textAlign" => "center"        ));        $data = array(          array("zone" => "North", "name" => "Northern Stores", "sale" => 4000),          array("zone" => "South", "name" => "Southern Stores", "sale" => 4500)        );        $table->addMultipleRows($data);        $this->addComponent ($table);    }}$db = new SampleDashboard();$db->renderStandalone();