Question

PHP致命错误：在user_model.php第46行的字符串上调用成员函数num_rows（）。其中第46行是＆＃34; $ users = $ this-＆gt; db-＆gt; query（$ query） - ＆GT;结果（）; ＆＃34;

它是一个客户订阅包查找器代码我试图解析客户订阅过期或无效的结果，

<?php if (! defined('BASEPATH')) exit('No direct script access allowed');
class User_Model extends Base_Model  
{

    function __construct()
    {
        parent::__construct();
    }


    /*** package expire***/
    function package_expire()
    {
        $query = "SELECT u.id,u.is_premium FROM ".$this->db->dbprefix(TBL_USERS)." u, ".$this->db->dbprefix(TBL_USERS_GROUPS)." ug WHERE u.id=ug.user_id AND ug.group_id='2'
        AND u.is_premium='1' ";

        $users = $this->db->query($query)->result();    

        if(count($users)>0) 
        {
            foreach($users as $u) :
                if($u->is_premium != 0) 
                {
                    $user_subscription = $this->base_model->fetch_records_from(TBL_SUBSCRIPTIONS,array('user_id'=>$u->id,'status'=>'Active'));

                    if(count($user_subscription)>0)
                    {
                        $user_subscription = $user_subscription[0];

                        if(isset($user_subscription->expire_date) && strtotime(date('Y-m-d')) > strtotime($user_subscription->expire_date))
                        {
                            $data['status']         = 'In-Active';
                            $whr['subscription_id'] = $user_subscription->subscription_id;

                            if($this->base_model->update_operation($data,TBL_SUBSCRIPTIONS,$whr))
                            {
                                $user_data['is_premium'] = '0';
                                $user_data['package_id'] = ' ';
                                $user_data['no_of_package_quotes'] = 0;
                                $user_data['no_of_package_quotes_used'] = 0;

                                $user_whr['id'] = $u->id;
                                $this->base_model->update_operation($user_data,TBL_USERS,$user_whr);
                            }                                   
                        }
                    }   
                }
            endforeach;
        }
    }

    function getUsers($conditions=array(),$limit=NULL)
    {
        $str='';
        if(count($conditions)>0)
        {
            if(isset($conditions['admin_read_status']))
                $str .= 'AND u.admin_read_status = "'.$conditions['admin_read_status'].'"';
        }

        $query  = 'SELECT u.*,ug.user_id,ug.group_id FROM '.TBL_PREFIX.TBL_USERS.' u 
                    INNER JOIN '.TBL_PREFIX.TBL_USERS_GROUPS.' ug ON u.id=ug.user_id 
                    AND ug.group_id='.GRP_USER.' '.$str.' ';
        $resultsetlimit = $this->db->query( $query );
        $this->numrows = $this->db->affected_rows();
        if($limit != '') $query = $query . ' LIMIT '.$limit;
        $resultsetlimit = $this->db->query( $query );
        return $resultsetlimit->result();           

    }

    function userSubscriptions($user_id=NULL,$conditions=array())
    {
        if($user_id=='')
            return false;

        $str='';
        if(count($conditions)>0)
        {
            if($conditions['status'])
                $str .= 'AND s.status = "'.$conditions['status'].'"';
            if($conditions['subscription_id'])
                $str .= 'AND s.subscription_id = "'.$conditions['subscription_id'].'"';
        }

        $query  = 'SELECT s.*,u.* FROM '.TBL_PREFIX.TBL_SUBSCRIPTIONS.' s 
                    INNER JOIN '.TBL_PREFIX.TBL_USERS.' u ON s.user_id=u.id 
                    AND u.id='.$user_id.' '.$str.' ';
        $resultsetlimit = $this->db->query( $query );
        $this->numrows = $this->db->affected_rows();
        $resultsetlimit = $this->db->query( $query );
        return $resultsetlimit->result();                   
    }
}
?>

Answer 1

看起来您正在尝试从数据库查询中获取受影响的行数。问题是你正在使用的类正在调用一个不存在的变量或函数。

修复是在打开课程后声明它。例如：

class User_Model extends Base_Model  
{
 public $num_rows = 0;

然后，您可以在运行查询后使用该值。

 $user_model = new User_Model();
 $query = $user_model->userSubscriptions(whatever goes in here);
 echo 'There were ' .$user_model->num_rows.' affected by this query';

Answer 2

function __construct($db) {
    parent::__construct($db);
    $this->db = $db;
}

您已经忘记了传递数据库对象，因为您的代码代表User_Model对象正在寻找它无法找到的成员$ this-＆gt; db变量（对象）。

PHP致命错误：在布尔值中调用成员函数result（）

2 个答案: