Codeigniter错误:调用未定义的函数mysql_pconnect()

Question

我已经将我的codeigniter版本从2.2.4一步一步更新到3.0.6,我收到一个错误:

An uncaught Exception was encountered

Type: Error

Message: Call to undefined function mysql_pconnect()

Filename: path-to-project\system\database\drivers\mysql\mysql_driver.php

Line Number: 135

Backtrace:

File: path-to-project\application\controllers\Main.php
Line: 10
Function: __construct

File: path-to-project\index.php
Line: 315
Function: require_once

我刚刚将index.php文件和系统目录替换为新目录,并根据教程对我的应用程序进行了一些更改.

这是主控制器:

class Main extends CI_Controller {

    function __construct()
    {
        parent::__construct();
        $this->load->model('main_model');
    }
}

是什么导致了这个问题？!

而这是链接的教程.

Answer 1

PHP 5.5.x中不推荐使用的功能:

现在不推荐使用原始的MySQL扩展,并且在连接到数据库时会生成E_DEPRECATED错误.而是使用MySQLi或PDO_MySQL扩展.

您正在使用已弃用的'mysql' config/database.php.找到该dbdriver文件并更改'mysqli'为使用'mysql':

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

Answer 2

感谢Anant

我得出结论:

我用新的文件完全改变了我在config文件夹中的旧database.php文件:

从:

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = '';
$db['default']['password'] = '';
$db['default']['database'] = '';
$db['default']['dbdriver'] = '';
$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;

至:

$db['default'] = array(
    'dsn'   => '',
    'hostname' => '',
    'username' => '',
    'password' => '',
    'database' => '',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

错误消失了!

Answer 3

转到 application/config/database.php
并更改mysql为mysqli

以前是这样的：

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

这是在解决方案之后：

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

我只是将 mysql 更改为 mysqli。就是这样

我的错误是

致命错误：未捕获错误：调用 E:\manish_data\software\xampp\htdocs\ci2\system\database\drivers\mysql\mysql_driver.php:92 中的未定义函数 mysql_pconnect() 堆栈跟踪：#0 E:\manish_data\ software\xampp\htdocs\ci2\system\database\DB_driver.php(116): CI_DB_mysql_driver->db_pconnect() #1 E:\manish_data\software\xampp\htdocs\ci2\system\database\DB.php(149) : CI_DB_driver->initialize() #2 E:\manish_data\software\xampp\htdocs\ci2\system\core\Loader.php(347): DB(Array, NULL) #3 E:\manish_data\software\xampp\ htdocs\ci2\application\models\usermodel.php(20): CI_Loader->database() #4 E:\manish_data\software\xampp\htdocs\ci2\application\controllers\users.php(15): UserModel-> getUsers() #5 E:\manish_data\software\xampp\htdocs\ci2\system\core\CodeIgniter.php(360): Users->index() #6 E:\manish_data\software\xampp\htdocs\ci2\index.php(202): require_once('E:\manish_data\...') #7 {main} 被抛出到 E:\manish_data\software\xampp\htdocs\ci2 \system\database\drivers\mysql\mysql_driver.php 第 92 行