doukai1226
doukai1226
2016-04-24 11:24
浏览 216
已采纳

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

I have updated my codeigniter version from 2.2.4 step by step to 3.0.6 and I get an error:

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

I have just replaced my index.php file and system directory with the new one and made some changes in my application according to tutorial.

and this is the Main controller:

class Main extends CI_Controller {

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

What causes the problem?!

And this is the link of the tutorial.

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3条回答 默认 最新

  • dongzh1988
    dongzh1988 2016-04-24 11:35
    已采纳

    Thanks to Anant

    I come to a conclusion:

    I completely changed my old database.php file in config folder with the new one:

    From:

    $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;
    

    To:

    $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
    );
    

    And the error is gone!

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  • douwengzao5790
    douwengzao5790 2016-11-01 10:35

    Deprecated features in PHP 5.5.x:

    The original MySQL extension is now deprecated, and will generate E_DEPRECATED errors when connecting to a database. Instead, use the MySQLi or PDO_MySQL extensions.

    You're using the deprecated 'mysql' dbdriver. Locate the config/database.php file and change dbdriver to use 'mysqli' :

    $db['default']['dbdriver'] = 'mysqli'; 
    
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  • doulingqiu4349
    doulingqiu4349 2018-03-10 10:04

    If this error happened when you're hosting the website, make sure to set the correct PHP Version (the one your CI use).

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