UTF-8 for CodeIgniter

UTF-8 string support for CodeIgniter based on Kohana's implementation.

This feature is provided by the class UTF8. Its methods are UTF-8 compatible alternatives to the following PHP string functions:

ltrim()
ord()
rtrim()
strcasecmp()
strcspn()
str_ireplace()
stristr()
strlen()
str_pad()
strpos()
strrev()
strrpos()
str_split()
strspn()
stripos()
strtolower()
strtoupper()
substr()
substr_replace()
trim()
ucfirst()
ucwords()
wordwrap()

There are also some other useful methods, browse code to get familiar with them.

Installation

1. Preview the file application/third_party/kohana/utf8/Kohana_UTF8.php and check the technical requirements described there. This feature has been tested with CodeIgniter 3.0.0-dev, also, it is expected to work on CodeIgniter 2.x.
2. Move the content of the directories application/classes, application/hooks, application/third_party/kohana to their corresponding places in your CodeIgniter based site.
3. Copy the setting from the file application/config/hooks.php and paste it inside the corresponding file in your site application/config/hooks.php. This (additional) hook is to register a class autoloader.
4. In your site open the file application/config/config.php and find the setting $config['enable_hooks']. Set it to TRUE.
5. Test the instalation with the example below.

An Example for Quick Testing

$string = 'Iñtërnâtiônàlizætiøn';

echo UTF8::strlen($string);
// Expected result: 20

echo '<br />';

echo UTF8::substr($string, 0, 10) . UTF8::substr($string, 10);
// Expected result: Iñtërnâtiônàlizætiøn

License Information

• For the original code about adaptation to CodeIgniter:
  Author: Ivan Tcholakov ivantcholakov@gmail.com, 2013-2020
  License: The MIT License, http://opensource.org/licenses/MIT

• For Kohana team's code:
  License: GNU LGPL 2.1, http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt