PHP 错误求解 分不多 谢谢

Question

Fatal error: Call to a member function isLogged() on a non-object in
我在本地上测试没问题  上传到服务器上进入后台的时候就报错 前台没问题  那位高人遇见过这种问题  麻烦告诉声 谢谢 
本地是Apache 服务器上是nginx  急

Answer 1

看下代码，是对象为空造成的，看下什么对象调用 isLogged

Answer 2

就检查你的 isLogged 调用到的地方是否有问题.这个得自己检查代码了。

Answer 3

public function getProduct($product_id) {
if ($this->customer->isLogged()) {  报的错误在这一行
$customer_group_id = $this->customer->getCustomerGroupId();
} else {
$customer_group_id = $this->config->get('config_customer_group_id');
}
  
   public function isLogged() {
     return $this->customer_id;
   }
    
        private $customer_id;
private $firstname;
private $lastname;
private $email;
private $telephone;
private $mobile;
private $newsletter;
private $customer_group_id;
private $address_id;

   public function __construct($registry) {
$this->config = $registry->get('config');
$this->db = $registry->get('db');
$this->request = $registry->get('request');
$this->session = $registry->get('session');

if (isset($this->session->data['customer_id'])) { 
$customer_query = $this->db->query();

if ($customer_query->num_rows) {
$this->customer_id = $customer_query->row['customer_id'];
$this->firstname = $customer_query->row['firstname'];
$this->lastname = $customer_query->row['lastname'];
$this->email = $customer_query->row['email'];
$this->telephone = $customer_query->row['telephone'];
$this->mobile = $customer_query->row['mobile'];
$this->newsletter = $customer_query->row['newsletter'];
$this->customer_group_id = $customer_query->row['customer_group_id'];
$this->address_id = $customer_query->row['address_id'];

       $this->db->query();

$query = $this->db->query();

if (!$query->num_rows) {
$this->db->query();
}
} else {
$this->logout();
}
   }

Answer 4

$this->customer在哪定义的？  

Answer 5

$this->customer如果是继承来的，那么你确定它有被初始化或者赋值吗？
错误提示，明显是$this->customer不存在，是null