将Codeigniter网站从实时服务器集成到本地服务器

Question

I try to integrate codeigniter website from live to local server

but have this error A PHP Error was encountered Severity: 8192

Message: Methods with the same name as their class will not be constructors in a future version of PHP; CI_Session has a deprecated constructor

Filename: libraries/Session.php

Line Number: 12

Fatal error: Uncaught Error: Call to undefined function mysql_pconnect() in C:\\xampp\\htdocs\\makan\\system\\database\\drivers\\mysql\\mysql_driver.php:91 Stack trace: #0 C:\\xampp\\htdocs\\makan\\system\\database\\DB_driver.php(115): CI_DB_mysql_driver->db_pconnect() #1 C:\\xampp\\htdocs\\makan\\system\\database\\DB.php(148): CI_DB_driver->initialize() #2 C:\\xampp\\htdocs\\makan\\system\\core\\Loader.php(346): DB(Array, NULL) #3 C:\\xampp\\htdocs\\makan\\application\\core\\MY_Controller.php(29): CI_Loader->database() #4 C:\\xampp\\htdocs\\makan\\application\\controllers\\site\\landing.php(7): MY_Controller->__construct() #5 C:\\xampp\\htdocs\\makan\\system\\core\\CodeIgniter.php(308): Landing->__construct() #6 C:\\xampp\\htdocs\\makan\\index.php(202): require_once('C:\\xampp\\htdocs...') #7 {main} thrown in C:\\xampp\\htdocs\\makan\\system\\database\\drivers\\mysql\\mysql_driver.php on line 91

Answer 1

mysql_ has been deprecated since PHP 5, and entirely removed as of PHP 7. You should not be using that driver.

Instead, have a look at either PHP MySQLi or PHP PDO

Find your database config file, and change the driver to:

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

Your config may also look like:

$db['mysql'] = array(
    'dsn'      => '',
    'hostname' => 'localhost',
    'username' => 'YOUR_USERNAME',
    'password' => 'YOUR_PASSWORD',
    'database' => 'DATABASE_NAME',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
);