Question

当我尝试在模型中加载数据库时遇到HTTP 500错误。以下是文件：我的模型文件：

    <?php

class Users extends CI_Model  {

    public function getUsers()  {
        $this->load->database();
        echo "yes"; 
    }
}

Database.php文件：

    <?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/*
| -------------------------------------------------------------------
| DATABASE CONNECTIVITY SETTINGS
| -------------------------------------------------------------------
| This file will contain the settings needed to access your database.
|
| For complete instructions please consult the 'Database Connection'
| page of the User Guide.
|
| -------------------------------------------------------------------
| EXPLANATION OF VARIABLES
| -------------------------------------------------------------------
|
|   ['hostname'] The hostname of your database server.
|   ['username'] The username used to connect to the database
|   ['password'] The password used to connect to the database
|   ['database'] The name of the database you want to connect to
|   ['dbdriver'] The database type. ie: mysql.  Currently supported:
                 mysql, mysqli, postgre, odbc, mssql, sqlite, oci8
|   ['dbprefix'] You can add an optional prefix, which will be added
|                to the table name when using the  Active Record class
|   ['pconnect'] TRUE/FALSE - Whether to use a persistent connection
|   ['db_debug'] TRUE/FALSE - Whether database errors should be displayed.
|   ['cache_on'] TRUE/FALSE - Enables/disables query caching
|   ['cachedir'] The path to the folder where cache files should be stored
|   ['char_set'] The character set used in communicating with the database
|   ['dbcollat'] The character collation used in communicating with the database
|                NOTE: For MySQL and MySQLi databases, this setting is only used
|                as a backup if your server is running PHP < 5.2.3 or MySQL < 5.0.7
|                (and in table creation queries made with DB Forge).
|                There is an incompatibility in PHP with mysql_real_escape_string() which
|                can make your site vulnerable to SQL injection if you are using a
|                multi-byte character set and are running versions lower than these.
|                Sites using Latin-1 or UTF-8 database character set and collation are unaffected.
|   ['swap_pre'] A default table prefix that should be swapped with the dbprefix
|   ['autoinit'] Whether or not to automatically initialize the database.
|   ['stricton'] TRUE/FALSE - forces 'Strict Mode' connections
|                           - good for ensuring strict SQL while developing
|
| The $active_group variable lets you choose which connection group to
| make active.  By default there is only one group (the 'default' group).
|
| The $active_record variables lets you determine whether or not to load
| the active record class
*/

$active_group = 'default';
$active_record = TRUE;

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = 'ans';
$db['default']['database'] = 'trial';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;


/* End of file database.php */
/* Location: ./application/config/database.php */

以下是控制器中的代码：

<?php

class Blog extends CI_Controller {

    public function index()
    {
        $this->load->model('users');
        $data = $this->users->getUsers();
        //echo $data['user'];
        //$this->load->view('userList',$data);
        //  qprint_r($data);
        echo $data;

    }

    public function add()  {
        echo "bye";
    } 
}

执行时，仅显示HTTP 500错误。这段代码有什么问题？

Answer 1

为什么不使用PHP的错误报告来查找。

http://php.net/manual/en/function.error-reporting.php

将以下内容添加到index.php

的顶部

<?php
    error_reporting(E_ALL);

Answer 2

在你的模特中。回复一些东西而不是打印。

listen

Answer 3

HTTP 500表示服务器错误。

除了您已经给出的答案之外，您是否检查过项目文件的权限配置是否正确？

此外，如果您检查Apache的错误日志，它应指出导致错误发生的原因。

Answer 4

由于服务器更新（不建议使用mysql ext）， config / database.php 应该从 mysql 到 mysqli 。很难找到此错误，因为它只是返回500而日志中没有任何内容。

$db['default']['dbdriver'] = 'mysql';

在codeigniter中加载数据库时出错500

4 个答案: