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44b78d7c8d
TODO: native recoding engine, written in PHP git-svn-id: file:///svn/phpbb/trunk@6174 89ea8834-ac86-4346-8a33-228a782c2dd0
130 lines
2.4 KiB
PHP
130 lines
2.4 KiB
PHP
<?php
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/**
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*
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* @package phpBB3
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* @version $Id$
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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*
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*/
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/**
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* UTF-8 tools
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*
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* Whenever possible, these functions will try to use PHP's built-in functions or
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* extensions, otherwise they will default to custom routines.
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*
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* If we go with UTF-8 in 3.2, we will also need a Unicode-aware replacement
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* to strtolower()
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*
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* @package phpBB3
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*/
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/**
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* Return the length (in characters) of a UTF-8 string
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*
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* @param string $text UTF-8 string
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* @return integer Length (in chars) of given string
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*/
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function utf8_strlen($text)
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{
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if (function_exists('iconv_strlen'))
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{
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return iconv_strlen($text, 'utf-8');
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}
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if (function_exists('mb_strlen'))
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{
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return mb_strlen($text, 'utf-8');
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}
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return strlen(utf8_decode($text));
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}
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/**
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* Recode a string to UTF-8
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*
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* If the encoding is not supported, the string is returned as-is
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*
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* @param string $string Original string
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* @param string $encoding Original encoding
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* @return string The string, encoded in UTF-8
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*/
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function utf8_recode($string, $encoding)
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{
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$encoding = strtolower($encoding);
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if ($encoding == 'utf-8' || !is_string($string) || !isset($string[0]))
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{
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return $string;
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}
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/**
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* PHP has a built-in function for encoding from iso-8859-1, let's use that
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*/
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if ($encoding == 'iso-8859-1')
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{
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return utf8_encode($string);
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}
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/**
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* First, try iconv()
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*/
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if (function_exists('iconv'))
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{
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$ret = @iconv($encoding, 'utf-8', $string);
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if (isset($ret[0]))
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{
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return $ret;
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}
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}
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/**
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* Try the mb_string extension
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*/
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if (function_exists('mb_convert_encoding'))
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{
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$ret = @mb_convert_encoding($string, 'utf-8', $encoding);
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if (isset($ret[0]))
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{
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return $ret;
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}
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}
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/**
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* Try the recode extension
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*/
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if (function_exists('recode_string'))
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{
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$ret = @recode_string($encoding . '..utf-8', $string);
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if (isset($ret[0]))
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{
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return $ret;
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}
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}
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/**
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* If nothing works, check if we have a custom transcoder available
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*/
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if (!preg_match('#^[a-z0-9\\-]+$#', $encoding))
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{
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/**
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* Make sure the encoding name is alphanumeric, we don't want it
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* to be abused into loading arbitrary files
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*/
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trigger_error('Unknown encoding: ' . $encoding);
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}
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global $phpbb_root_path;
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if (!file_exists($phpbb_root_path . 'includes/utf/data/'))
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{
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return $string;
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}
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die('Finish me!! '.basename(__FILE__).' at line '.__LINE__);
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}
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?>
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