致命错误：在第137行的/home/*/public_html/application/core/MY_Controller.php中的非对象上调用成员函数num_rows（）

我得到：

致命错误：在第137行的/home/nbaxy/public\u html/application/core/MY\u Controller.php中调用非对象上的成员函数num_rows

MY_Controller.php：

<?php

class MY_Controller extends CI_Controller
{

    private $dblabg =  array();
    public function __construct()
    {       
        parent::__construct();      


        if($this->config->item("use_database") == 1)
        {           
            $this->load->database();
            $this->load->model("dashboard/admin");                              
            $this->set_config();    
            if($this->config->item("module_user_online") == 1 )
            {       
                $this->set_online();        
            }

        }
        $this->set_lang();
        $this->clean_cache();

        if($this->router->fetch_module() == 'dashboard')
        {
            $this->__dashboard();
        }



    }
    protected function set_lang()
    {       
        if($this->config->item("user_change_lang") == "1")
        {           
            if($this->input->get("lang"))
            {               
                if(in_array($this->input->get("lang"),$this->config->item("langs_available")) || $this->config->item("use_db_language") == '1')
                {                   
                    $this->config->set_item("lang",$this->input->get("lang"));
                    $this->session->set_userdata('lang', $this->input->get("lang"));
                }
            }
            else
            {
                if($this->session->userdata('lang') != '')
                {
                    $this->config->set_item("lang",$this->session->userdata('lang'));
                }
                else
                {
                    if($this->config->item("language_browser") == '1' )
                    {
                        $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
                        $temp = $this->admin->getTable('languages',array("iso" => $lang));

                        if($temp->num_rows()>0 && $this->config->item("language_browser") == '1' && $this->router->fetch_module() != 'dashboard')
                        {
                            $d = $temp->row();
                            $this->config->set_item("lang",$d->language);
                        }
                    }                   

                }
            }           
        }
        if($this->config->item("use_db_language") == '1')
        {           
            $this->load_db_language($this->config->item("lang"));
        }
        else
            $this->lang->load($this->config->item("lang"),$this->config->item("lang"));         

    }

    public function load_db_language($lang = 'english')
    {



        $this->db->select   ('*');
        $this->db->from     ('language');
        $this->db->where    ('language', $lang);        

        $query = $this->db->get()->result();
        foreach ( $query as $row )        
        {
            $return[$row->key] = $row->text;

        }

        $this->dblabg = $return;


        $this->db->select   ('*');
        $this->db->from     ('languages');        
        $query = $this->db->get()->result();
        $return = array();
        foreach ( $query as $row )        
        {  
            $return[$row->language] = $row->language;
        }        

        $this->config->set_item("langs_available", $return);                

        unset($query,$return);
    }


    public function get_label($key)
    {
        return  $this->dblabg[$key];
    }

    protected function clean_cache()
    {
        if(exec('echo EXEC') == 'EXEC')
        {
            if($this->config->item("clean_cache") != '0')
            {               
                exec("find  ".getcwd()." -type f -name '*.cache' -mtime +".$this->config->item("clean_cache")." -exec rm {} \;");                   
            }

        }
    }

    protected function set_online()
    {
        $this->admin->setUsuarioOnline(intval($this->session->userdata('id')));
    }
    protected function set_config()
    {       

        $config     = $this->admin->getTable("settings");       
        if($config->num_rows() == 0)
        {
            show_error("No settings founds in your database, you need install this script on clean database",400);
        }
        foreach ($config->result_array() as $row)
        {

            if($row['var'] != 'use_database')
            {
                if($row['var'] == 'langs_available')
                {

                    $this->load->helper('directory');
                    $langs = directory_map('./application/language');
                    foreach ($langs as $key => $value) {
                         $temp[] = $key;                        
                    }                   
                    $row['value'] = $temp;                   
                }                               
                if($row['var'] == 'theme')
                {
                    if($_GET['skin'])
                    {
                        $row['value'] = $_GET['skin'];
                    }
                }
                if(!is_array($row['value']))
                {
                    //$row['value'] = str_ireplace('"', "'",$row['value']);
                    $row['value'] = str_ireplace('\"', '"',$row['value']);
                    $row['value'] = str_ireplace("\'", "'",$row['value']);
                    $row['value'] = html_entity_decode($row['value']);  

                }

                $this->config->set_item($row['var'], $row['value']);    


                if($this->agent->is_mobile())
                {                   
                    $this->config->set_item("theme", $this->config->item("theme_mobile"));                                                      
                }
            }

        }

        if($this->agent->is_mobile())
        {           
            if($this->config->item("mobile_redirect") != '')                
                redirect($this->config->item("mobile_redirect"), 'location', 301);
        }

        if(is_logged())
        {
            $this->config->set_item("biography_lang_temp",$this->config->item("biography_lang"));                       
            $this->config->set_item("biography_lang", $this->session->userdata('biography_lang'));                      
        }       





           $config = Array(
                'protocol' => 'smtp',
                'smtp_host' => $this->config->item("smtp_host"),
                'smtp_port' => $this->config->item("smtp_port"),
                'smtp_user' => $this->config->item("smtp_user"), // change it to yours
                'smtp_pass' => $this->config->item("smtp_pass"), // change it to yours
                'mailtype' => 'html',
                'charset' => 'utf-8',
                'wordwrap' => TRUE
        );
        $this->load->library('email',$config);  
    }

    protected function __dashboard()
    {
        if($this->config->item("use_database") == 0)
        {
            show_404(); 
        }
        if(!is_logged() && $this->router->method != 'login'  && $this->router->method != 'logout' )
        {
            redirect(base_url()."dashboard/login");
        }           
        if($this->session->userdata('is_admin') != 1 && $this->router->method != 'login')
        {
            //redirect(base_url(),"refresh");
            redirect(base_url()."dashboard/login");
        }
        else{
            if($this->session->userdata('username') == 'demo@jodacame.com' && $this->router->method != 'login')
            {
                if($this->router->method == 'website')
                {
                    $this->config->set_item("lastfm", 'lastfmdemomodeapikey');          
                }
                if($_POST || $this->router->method == 'smtp' || $this->router->method == 'license' || $this->router->method =='users'  || $this->router->method =='lyrics'  ||  $this->router->method == 'newsletter' )
                {
                    show_error("Demo Account don't have permission for this action",403);
                }

            }
            // Upgrade            
            if(file_exists("upgrade/upgrade.sql"))
            {
                $MD5 = md5_file("upgrade/upgrade.sql");
                if($this->config->item("md5updated") != $MD5)
                {
                    $sql    = file_get_contents("upgrade/upgrade.sql");
                    $sqls   = explode(";\n",$sql);
                    foreach ($sqls as $key => $value) {                             
                        if($value != '')
                        {
                            $this->db->query($value);
                            //echo $this->db->last_query()."<br>";  
                        }                       
                    }               
                    $this->db->query("UPDATE settings SET value = '$MD5' WHERE var='md5updated';");                 
                    $this->session->sess_destroy();                 
                    //echo $this->db->last_query()."<br>";
                    redirect(base_url()."dashboard/login/1");
                }               

            }

            if(file_exists("install.sql"))
            {
                $sql    = file_get_contents("install.sql");
                $sqls   = explode(";\n",$sql);
                foreach ($sqls as $key => $value) {                             
                    if($value != '')
                    {
                        $this->db->query($value);
                        //echo $this->db->last_query()."<br>";  
                    }                       
                }           
                unlink("install.sql");
                redirect(base_url()."dashboard/login/2");
            }                               



            // Check install modules



        }       

    }
}

---

请告诉我，如何解决此问题？

问题是您正在调用$temp->num\u行您的变量$temp不是数据库查询的结果集。您正在调用一个不存在的方法。似乎您正在尝试获取表“语言”上的数据行数。在这种情况下，您需要执行$SQL查询

Example:

// this assumes $mysqli is a successfull connection to the table 'languages'
$query = "SELECT COUNT(id) FROM `languages`";
if ($result = $mysqli->query($query)) {

$row_cnt = $result->num_rows; //$row_cnt now equals an integer.
}

---

*注意：您需要将$temp->numrows替换为if$row\u cnt>0…

哪一行是第137行？继续之前，请始终检查您的查询是否成功。什么是$this->admin？看起来$this->admin->getTable没有返回您期望它返回的内容。