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<?php
/**
*
* @package phpBB3
* @version $Id$
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* UTF-8 tools
*
* Whenever possible, these functions will try to use PHP's built-in functions or
* extensions, otherwise they will default to custom routines.
*
* If we go with UTF-8 in 3.2, we will also need a Unicode-aware replacement
* to strtolower()
*
* @package phpBB3
*/
/**
* Return the length (in characters) of a UTF-8 string
*
* @param string $text UTF-8 string
* @return integer Length (in chars) of given string
*/
function utf8_strlen($text)
{
if (function_exists('iconv_strlen'))
{
return iconv_strlen($text, 'utf-8');
}
if (function_exists('mb_strlen'))
{
return mb_strlen($text, 'utf-8');
}
return strlen(utf8_decode($text));
}
/**
* Recode a string to UTF-8
*
* If the encoding is not supported, the string is returned as-is
*
* @param string $string Original string
* @param string $encoding Original encoding
* @return string The string, encoded in UTF-8
*/
function utf8_recode($string, $encoding)
{
$encoding = strtolower($encoding);
if ($encoding == 'utf-8' || !is_string($string) || !isset($string[0]))
{
return $string;
}
/**
* PHP has a built-in function for encoding from iso-8859-1, let's use that
*/
if ($encoding == 'iso-8859-1')
{
return utf8_encode($string);
}
/**
* First, try iconv()
*/
if (function_exists('iconv'))
{
$ret = @iconv($encoding, 'utf-8', $string);
if (isset($ret[0]))
{
return $ret;
}
}
/**
* Try the mb_string extension
*/
if (function_exists('mb_convert_encoding'))
{
$ret = @mb_convert_encoding($string, 'utf-8', $encoding);
if (isset($ret[0]))
{
return $ret;
}
}
/**
* Try the recode extension
*/
if (function_exists('recode_string'))
{
$ret = @recode_string($encoding . '..utf-8', $string);
if (isset($ret[0]))
{
return $ret;
}
}
/**
* If nothing works, check if we have a custom transcoder available
*/
if (!preg_match('#^[a-z0-9\\-]+$#', $encoding))
{
/**
* Make sure the encoding name is alphanumeric, we don't want it
* to be abused into loading arbitrary files
*/
trigger_error('Unknown encoding: ' . $encoding);
}
global $phpbb_root_path;
if (!file_exists($phpbb_root_path . 'includes/utf/data/'))
{
return $string;
}
die('Finish me!! '.basename(__FILE__).' at line '.__LINE__);
}
?>
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