Some considerations for upgrading the project from CodeIgniter 2.2 to CodeIgniter 3.0, codeigniter2.2_php Tutorial

Some considerations for upgrading the project from CodeIgniter 2.2 to CodeIgniter 3.0, codeigniter2.2

1. Replace all files and folders in the system directory, and replace index.php

2. The first letters of the files in controllers and models need to be capitalized: application.php-application.php, m_application.php-m_application.php

3. Replace config/mimes.php

4. Remove the $auto_load[' core ' from the config/autoload.php

5. The use of the session library has changed significantly: The main thing in the project is to modify the Unset_user_data function

//  Old $this->session->unset_userdata (array(' item ' = ', ' item2 ' = ') '); // New $this->session->unset_userdata (array(' Item ', ' item2 '));

6. Update the config/database.php file

$active _group = ' default '; // $active _record = TRUE; $query _builder TRUE ; // $db [' Default '] [' dbdriver '] = ' mysql '; $db [' Default '] [' dbdriver '] = ' mysqli ';

7. Copy the Errors folder under the CI3.0 Views folder to the Views folder of the project.

8. Update the config/routes.php file, CI3.0 (: Any) does not include '/'

(.+)    // matches anything (: Any)  // matches any character, except for '/'

For more information, please see: http://codeigniter.org.cn/user_guide/installation/upgrade_300.html

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