什么原因导致“对非对象调用... getCalendarListFeed（）”错误？

Question

我有以下代码：

<?php 
require_once('Zend/Loader.php'); 
$classes = array('Zend_Gdata','Zend_Gdata_Query','Zend_Gdata_ClientLogin','Zend_Gdata_Calendar'); 
foreach($classes as $class) { 
    Zend_Loader::loadClass($class); 
} 
$user = 'me@gmail.com'; 
$pass = 'MyPassword'; 
$service = Zend_Gdata_Calendar::AUTH_SERVICE_NAME; 
$client = Zend_Gdata_ClientLogin::getHttpClient($user,$pass,$service); 
$service = $Zend_Gdata_Calendar[$client]; 

$listFeed = $service->getCalendarListFeed(); 

此代码返回Call to a member function getCalendarListFeed() on a non-object in MyCal.php on line 13。

什么是造成此错误？

Answer 1

我知道这是有点过时了，但给这个镜头！

$service = Zend_Gdata_Calendar::AUTH_SERVICE_NAME; 
$client = Zend_Gdata_ClientLogin::getHttpClient($email, $password, $service); 
$service = new Zend_Gdata_Calendar($client);