A simple collection of functions to provide a standardized framework for working with multibyte strings (like UTF-8) in a variety of server environments. Requires either the mbstring or iconv extensions to work!
The following functions are included in this file to support most application needs when dealing with UTF-8 data.
If the mbstring PHP extension is not loaded then the following functions are also created:
Using UTF-8 in your application
All of these functions expect valid UTF-8 data. Therefore the first step in your application is to filter incoming data to insure it's valid.
$utf8_text = encode($_POST['text']);
From there on you can be sure that $utf8_text is valid UTF-8 and can be stored in your database or parsed by your application.
If using a database make sure to set the the proper connection encoding (MySQL example):
mysql_query('SET NAMES utf8');
Make sure to HTML encode everything you show to the user. This prevents XSS and CSFR attempts:
print htmlspecialchars($utf8_text, ENT_QUOTES, 'utf-8');
Also make sure to send the proper UTF-8 header if you are displaying HTML:
//Sending UTF-8 HTML data header('Content-Type: text/html; charset=utf-8');
Have fun! David Pennington