我在infusionsoft api中添加了一个orderITem ..但我收到了语法错误,但我无法找到答案.

require_once($_SERVER['DOCUMENT_ROOT']."/infusionsoftAPI/src/isdk.PHP");
 $app = new iSDK;

 $_REQUEST['contactId'] = 4;

 if(!empty($_REQUEST['contactId']))
 {
    if ($app->CFgCon("aaaa",'eeeeeeeeeeeeeeeeeeeeeeeeeeeeeee')) {
        echo "Infusionsoft Connection Successfulls";
    } else {
        echo "Infusionsoft Connection Failed";
        exit;
    }
} else {
    echo '<p>No contact id selected.</p>';
    exit();
}
some code
some code
$invoiceid = $app->blankOrder($contactId,"Video Report Subscription - Extra",$oDate,0);
$extra_PRice = $extraemail * $result['price_after_expire'];

$ordresult = $app->addOrderItem($invoiceId,4,9,$extra_price,1,"helloo","aaaaaa");

我收到这个错误

但是当我写作时

$ordresult = $app->addOrderItem($invoiceId,22.00,"aaaaaa");

有用….
问题在于它没有将$extra_price作为其参数.