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php-phpbb/phpBB/includes/utf/utf_tools.php
Marc Alexander 7a6a16e3a5 [ticket/13454] Remove unused variables 
This is part 5 and there is more to come.

PHPBB3-13454
2016-01-06 13:52:11 +01:00

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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
/**
*/
if (!defined('IN_PHPBB'))
{
exit;
}
// Enforce ASCII only string handling
setlocale(LC_CTYPE, 'C');
/**
* Setup the UTF-8 portability layer
*/
Patchwork\Utf8\Bootup::initUtf8Encode();
Patchwork\Utf8\Bootup::initMbstring();
Patchwork\Utf8\Bootup::initIntl();
/**
* 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.
*
*/
/**
* UTF-8 aware alternative to strrpos
* @ignore
*/
function utf8_strrpos($str, $needle, $offset = null)
{
// Emulate behaviour of strrpos rather than raising warning
if (empty($str))
{
return false;
}
if (is_null($offset))
{
return mb_strrpos($str, $needle);
}
else
{
return mb_strrpos($str, $needle, $offset);
}
}
/**
* UTF-8 aware alternative to strpos
* @ignore
*/
function utf8_strpos($str, $needle, $offset = null)
{
if (is_null($offset))
{
return mb_strpos($str, $needle);
}
else
{
return mb_strpos($str, $needle, $offset);
}
}
/**
* UTF-8 aware alternative to strtolower
* @ignore
*/
function utf8_strtolower($str)
{
return mb_strtolower($str);
}
/**
* UTF-8 aware alternative to strtoupper
* @ignore
*/
function utf8_strtoupper($str)
{
return mb_strtoupper($str);
}
/**
* UTF-8 aware alternative to substr
* @ignore
*/
function utf8_substr($str, $offset, $length = null)
{
if (is_null($length))
{
return mb_substr($str, $offset);
}
else
{
return mb_substr($str, $offset, $length);
}
}
/**
* Return the length (in characters) of a UTF-8 string
* @ignore
*/
function utf8_strlen($text)
{
return mb_strlen($text, 'utf-8');
}
/**
* UTF-8 aware alternative to str_split
* Convert a string to an array
*
* @author Harry Fuecks
* @param string $str UTF-8 encoded
* @param int $split_len number to characters to split string by
* @return array characters in string reverses
*/
function utf8_str_split($str, $split_len = 1)
{
if (!is_int($split_len) || $split_len < 1)
{
return false;
}
$len = utf8_strlen($str);
if ($len <= $split_len)
{
return array($str);
}
preg_match_all('/.{' . $split_len . '}|[^\x00]{1,' . $split_len . '}$/us', $str, $ar);
return $ar[0];
}
/**
* UTF-8 aware alternative to strspn
* Find length of initial segment matching the mask
*
* @author Harry Fuecks
*/
function utf8_strspn($str, $mask, $start = null, $length = null)
{
if ($start !== null || $length !== null)
{
$str = utf8_substr($str, $start, $length);
}
preg_match('/^[' . $mask . ']+/u', $str, $matches);
if (isset($matches[0]))
{
return utf8_strlen($matches[0]);
}
return 0;
}
/**
* UTF-8 aware alternative to ucfirst
* Make a string's first character uppercase
*
* @author Harry Fuecks
* @param string
* @return string with first character as upper case (if applicable)
*/
function utf8_ucfirst($str)
{
switch (utf8_strlen($str))
{
case 0:
return '';
break;
case 1:
return utf8_strtoupper($str);
break;
default:
preg_match('/^(.{1})(.*)$/us', $str, $matches);
return utf8_strtoupper($matches[1]) . $matches[2];
break;
}
}
/**
* 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 $encoding Original encoding (lowered)
* @return string The string, encoded in UTF-8
*/
function utf8_recode($string, $encoding)
{
$encoding = strtolower($encoding);
if ($encoding == 'utf-8' || !is_string($string) || empty($string))
{
return $string;
}
// we force iso-8859-1 to be cp1252
if ($encoding == 'iso-8859-1')
{
$encoding = 'cp1252';
}
// convert iso-8859-8-i to iso-8859-8
else if ($encoding == 'iso-8859-8-i')
{
$encoding = 'iso-8859-8';
$string = hebrev($string);
}
// First, try iconv()
if (function_exists('iconv'))
{
$ret = @iconv($encoding, 'utf-8', $string);
if (!empty($ret))
{
return $ret;
}
}
// Try the mb_string extension
if (function_exists('mb_convert_encoding'))
{
// mbstring is nasty on PHP4, we must make *sure* that we send a good encoding
switch ($encoding)
{
case 'iso-8859-1':
case 'iso-8859-2':
case 'iso-8859-4':
case 'iso-8859-7':
case 'iso-8859-9':
case 'iso-8859-15':
case 'windows-1251':
case 'windows-1252':
case 'cp1252':
case 'shift_jis':
case 'euc-kr':
case 'big5':
case 'gb2312':
$ret = @mb_convert_encoding($string, 'utf-8', $encoding);
if (!empty($ret))
{
return $ret;
}
}
}
// Try the recode extension
if (function_exists('recode_string'))
{
$ret = @recode_string($encoding . '..utf-8', $string);
if (!empty($ret))
{
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, E_USER_ERROR);
}
global $phpbb_root_path, $phpEx;
// iso-8859-* character encoding
if (preg_match('/iso[_ -]?8859[_ -]?(\\d+)/', $encoding, $array))
{
switch ($array[1])
{
case '1':
case '2':
case '4':
case '7':
case '8':
case '9':
case '15':
if (!function_exists('iso_8859_' . $array[1]))
{
if (!file_exists($phpbb_root_path . 'includes/utf/data/recode_basic.' . $phpEx))
{
trigger_error('Basic reencoder file is missing', E_USER_ERROR);
}
include($phpbb_root_path . 'includes/utf/data/recode_basic.' . $phpEx);
}
return call_user_func('iso_8859_' . $array[1], $string);
break;
default:
trigger_error('Unknown encoding: ' . $encoding, E_USER_ERROR);
break;
}
}
// CP/WIN character encoding
if (preg_match('/(?:cp|windows)[_\- ]?(\\d+)/', $encoding, $array))
{
switch ($array[1])
{
case '932':
break;
case '1250':
case '1251':
case '1252':
case '1254':
case '1255':
case '1256':
case '1257':
case '874':
if (!function_exists('cp' . $array[1]))
{
if (!file_exists($phpbb_root_path . 'includes/utf/data/recode_basic.' . $phpEx))
{
trigger_error('Basic reencoder file is missing', E_USER_ERROR);
}
include($phpbb_root_path . 'includes/utf/data/recode_basic.' . $phpEx);
}
return call_user_func('cp' . $array[1], $string);
break;
default:
trigger_error('Unknown encoding: ' . $encoding, E_USER_ERROR);
break;
}
}
// TIS-620
if (preg_match('/tis[_ -]?620/', $encoding))
{
if (!function_exists('tis_620'))
{
if (!file_exists($phpbb_root_path . 'includes/utf/data/recode_basic.' . $phpEx))
{
trigger_error('Basic reencoder file is missing', E_USER_ERROR);
}
include($phpbb_root_path . 'includes/utf/data/recode_basic.' . $phpEx);
}
return tis_620($string);
}
// SJIS
if (preg_match('/sjis(?:[_ -]?win)?|(?:cp|ibm)[_ -]?932|shift[_ -]?jis/', $encoding))
{
if (!function_exists('sjis'))
{
if (!file_exists($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx))
{
trigger_error('CJK reencoder file is missing', E_USER_ERROR);
}
include($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx);
}
return sjis($string);
}
// EUC_KR
if (preg_match('/euc[_ -]?kr/', $encoding))
{
if (!function_exists('euc_kr'))
{
if (!file_exists($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx))
{
trigger_error('CJK reencoder file is missing', E_USER_ERROR);
}
include($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx);
}
return euc_kr($string);
}
// BIG-5
if (preg_match('/big[_ -]?5/', $encoding))
{
if (!function_exists('big5'))
{
if (!file_exists($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx))
{
trigger_error('CJK reencoder file is missing', E_USER_ERROR);
}
include($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx);
}
return big5($string);
}
// GB2312
if (preg_match('/gb[_ -]?2312/', $encoding))
{
if (!function_exists('gb2312'))
{
if (!file_exists($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx))
{
trigger_error('CJK reencoder file is missing', E_USER_ERROR);
}
include($phpbb_root_path . 'includes/utf/data/recode_cjk.' . $phpEx);
}
return gb2312($string);
}
// Trigger an error?! Fow now just give bad data :-(
trigger_error('Unknown encoding: ' . $encoding, E_USER_ERROR);
}
/**
* Replace all UTF-8 chars that are not in ASCII with their NCR
*
* @param string $text UTF-8 string in NFC
* @return string ASCII string using NCRs for non-ASCII chars
*/
function utf8_encode_ncr($text)
{
return preg_replace_callback('#[\\xC2-\\xF4][\\x80-\\xBF]{1,3}#', 'utf8_encode_ncr_callback', $text);
}
/**
* Callback used in encode_ncr()
*
* Takes a UTF-8 char and replaces it with its NCR. Attention, $m is an array
*
* @param array $m 0-based numerically indexed array passed by preg_replace_callback()
* @return string A HTML NCR if the character is valid, or the original string otherwise
*/
function utf8_encode_ncr_callback($m)
{
return '&#' . utf8_ord($m[0]) . ';';
}
/**
* Converts a UTF-8 char to an NCR
*
* @param string $chr UTF-8 char
* @return integer UNICODE code point
*/
function utf8_ord($chr)
{
switch (strlen($chr))
{
case 1:
return ord($chr);
break;
case 2:
return ((ord($chr[0]) & 0x1F) << 6) | (ord($chr[1]) & 0x3F);
break;
case 3:
return ((ord($chr[0]) & 0x0F) << 12) | ((ord($chr[1]) & 0x3F) << 6) | (ord($chr[2]) & 0x3F);
break;
case 4:
return ((ord($chr[0]) & 0x07) << 18) | ((ord($chr[1]) & 0x3F) << 12) | ((ord($chr[2]) & 0x3F) << 6) | (ord($chr[3]) & 0x3F);
break;
default:
return $chr;
}
}
/**
* Converts an NCR to a UTF-8 char
*
* @param int $cp UNICODE code point
* @return string UTF-8 char
*/
function utf8_chr($cp)
{
if ($cp > 0xFFFF)
{
return chr(0xF0 | ($cp >> 18)) . chr(0x80 | (($cp >> 12) & 0x3F)) . chr(0x80 | (($cp >> 6) & 0x3F)) . chr(0x80 | ($cp & 0x3F));
}
else if ($cp > 0x7FF)
{
return chr(0xE0 | ($cp >> 12)) . chr(0x80 | (($cp >> 6) & 0x3F)) . chr(0x80 | ($cp & 0x3F));
}
else if ($cp > 0x7F)
{
return chr(0xC0 | ($cp >> 6)) . chr(0x80 | ($cp & 0x3F));
}
else
{
return chr($cp);
}
}
/**
* Convert Numeric Character References to UTF-8 chars
*
* Notes:
* - we do not convert NCRs recursively, if you pass &#38;#38; it will return &#38;
* - we DO NOT check for the existence of the Unicode characters, therefore an entity may be converted to an inexistent codepoint
*
* @param string $text String to convert, encoded in UTF-8 (no normal form required)
* @return string UTF-8 string where NCRs have been replaced with the actual chars
*/
function utf8_decode_ncr($text)
{
return preg_replace_callback('/&#([0-9]{1,6}|x[0-9A-F]{1,5});/i', 'utf8_decode_ncr_callback', $text);
}
/**
* Callback used in decode_ncr()
*
* Takes a NCR (in decimal or hexadecimal) and returns a UTF-8 char. Attention, $m is an array.
* It will ignore most of invalid NCRs, but not all!
*
* @param array $m 0-based numerically indexed array passed by preg_replace_callback()
* @return string UTF-8 char
*/
function utf8_decode_ncr_callback($m)
{
$cp = (strncasecmp($m[1], 'x', 1)) ? $m[1] : hexdec(substr($m[1], 1));
return utf8_chr($cp);
}
/**
* Case folds a unicode string as per Unicode 5.0, section 3.13
*
* @param string $text text to be case folded
* @param string $option determines how we will fold the cases
* @return string case folded text
*/
function utf8_case_fold($text, $option = 'full')
{
static $uniarray = array();
global $phpbb_root_path, $phpEx;
// common is always set
if (!isset($uniarray['c']))
{
$uniarray['c'] = include($phpbb_root_path . 'includes/utf/data/case_fold_c.' . $phpEx);
}
// only set full if we need to
if ($option === 'full' && !isset($uniarray['f']))
{
$uniarray['f'] = include($phpbb_root_path . 'includes/utf/data/case_fold_f.' . $phpEx);
}
// only set simple if we need to
if ($option !== 'full' && !isset($uniarray['s']))
{
$uniarray['s'] = include($phpbb_root_path . 'includes/utf/data/case_fold_s.' . $phpEx);
}
// common is always replaced
$text = strtr($text, $uniarray['c']);
if ($option === 'full')
{
// full replaces a character with multiple characters
$text = strtr($text, $uniarray['f']);
}
else
{
// simple replaces a character with another character
$text = strtr($text, $uniarray['s']);
}
return $text;
}
/**
* Takes the input and does a "special" case fold. It does minor normalization
* and returns NFKC compatable text
*
* @param string $text text to be case folded
* @param string $option determines how we will fold the cases
* @return string case folded text
*/
function utf8_case_fold_nfkc($text, $option = 'full')
{
static $fc_nfkc_closure = array(
"\xCD\xBA" => "\x20\xCE\xB9",
"\xCF\x92" => "\xCF\x85",
"\xCF\x93" => "\xCF\x8D",
"\xCF\x94" => "\xCF\x8B",
"\xCF\xB2" => "\xCF\x83",
"\xCF\xB9" => "\xCF\x83",
"\xE1\xB4\xAC" => "\x61",
"\xE1\xB4\xAD" => "\xC3\xA6",
"\xE1\xB4\xAE" => "\x62",
"\xE1\xB4\xB0" => "\x64",
"\xE1\xB4\xB1" => "\x65",
"\xE1\xB4\xB2" => "\xC7\x9D",
"\xE1\xB4\xB3" => "\x67",
"\xE1\xB4\xB4" => "\x68",
"\xE1\xB4\xB5" => "\x69",
"\xE1\xB4\xB6" => "\x6A",
"\xE1\xB4\xB7" => "\x6B",
"\xE1\xB4\xB8" => "\x6C",
"\xE1\xB4\xB9" => "\x6D",
"\xE1\xB4\xBA" => "\x6E",
"\xE1\xB4\xBC" => "\x6F",
"\xE1\xB4\xBD" => "\xC8\xA3",
"\xE1\xB4\xBE" => "\x70",
"\xE1\xB4\xBF" => "\x72",
"\xE1\xB5\x80" => "\x74",
"\xE1\xB5\x81" => "\x75",
"\xE1\xB5\x82" => "\x77",
"\xE2\x82\xA8" => "\x72\x73",
"\xE2\x84\x82" => "\x63",
"\xE2\x84\x83" => "\xC2\xB0\x63",
"\xE2\x84\x87" => "\xC9\x9B",
"\xE2\x84\x89" => "\xC2\xB0\x66",
"\xE2\x84\x8B" => "\x68",
"\xE2\x84\x8C" => "\x68",
"\xE2\x84\x8D" => "\x68",
"\xE2\x84\x90" => "\x69",
"\xE2\x84\x91" => "\x69",
"\xE2\x84\x92" => "\x6C",
"\xE2\x84\x95" => "\x6E",
"\xE2\x84\x96" => "\x6E\x6F",
"\xE2\x84\x99" => "\x70",
"\xE2\x84\x9A" => "\x71",
"\xE2\x84\x9B" => "\x72",
"\xE2\x84\x9C" => "\x72",
"\xE2\x84\x9D" => "\x72",
"\xE2\x84\xA0" => "\x73\x6D",
"\xE2\x84\xA1" => "\x74\x65\x6C",
"\xE2\x84\xA2" => "\x74\x6D",
"\xE2\x84\xA4" => "\x7A",
"\xE2\x84\xA8" => "\x7A",
"\xE2\x84\xAC" => "\x62",
"\xE2\x84\xAD" => "\x63",
"\xE2\x84\xB0" => "\x65",
"\xE2\x84\xB1" => "\x66",
"\xE2\x84\xB3" => "\x6D",
"\xE2\x84\xBB" => "\x66\x61\x78",
"\xE2\x84\xBE" => "\xCE\xB3",
"\xE2\x84\xBF" => "\xCF\x80",
"\xE2\x85\x85" => "\x64",
"\xE3\x89\x90" => "\x70\x74\x65",
"\xE3\x8B\x8C" => "\x68\x67",
"\xE3\x8B\x8E" => "\x65\x76",
"\xE3\x8B\x8F" => "\x6C\x74\x64",
"\xE3\x8D\xB1" => "\x68\x70\x61",
"\xE3\x8D\xB3" => "\x61\x75",
"\xE3\x8D\xB5" => "\x6F\x76",
"\xE3\x8D\xBA" => "\x69\x75",
"\xE3\x8E\x80" => "\x70\x61",
"\xE3\x8E\x81" => "\x6E\x61",
"\xE3\x8E\x82" => "\xCE\xBC\x61",
"\xE3\x8E\x83" => "\x6D\x61",
"\xE3\x8E\x84" => "\x6B\x61",
"\xE3\x8E\x85" => "\x6B\x62",
"\xE3\x8E\x86" => "\x6D\x62",
"\xE3\x8E\x87" => "\x67\x62",
"\xE3\x8E\x8A" => "\x70\x66",
"\xE3\x8E\x8B" => "\x6E\x66",
"\xE3\x8E\x8C" => "\xCE\xBC\x66",
"\xE3\x8E\x90" => "\x68\x7A",
"\xE3\x8E\x91" => "\x6B\x68\x7A",
"\xE3\x8E\x92" => "\x6D\x68\x7A",
"\xE3\x8E\x93" => "\x67\x68\x7A",
"\xE3\x8E\x94" => "\x74\x68\x7A",
"\xE3\x8E\xA9" => "\x70\x61",
"\xE3\x8E\xAA" => "\x6B\x70\x61",
"\xE3\x8E\xAB" => "\x6D\x70\x61",
"\xE3\x8E\xAC" => "\x67\x70\x61",
"\xE3\x8E\xB4" => "\x70\x76",
"\xE3\x8E\xB5" => "\x6E\x76",
"\xE3\x8E\xB6" => "\xCE\xBC\x76",
"\xE3\x8E\xB7" => "\x6D\x76",
"\xE3\x8E\xB8" => "\x6B\x76",
"\xE3\x8E\xB9" => "\x6D\x76",
"\xE3\x8E\xBA" => "\x70\x77",
"\xE3\x8E\xBB" => "\x6E\x77",
"\xE3\x8E\xBC" => "\xCE\xBC\x77",
"\xE3\x8E\xBD" => "\x6D\x77",
"\xE3\x8E\xBE" => "\x6B\x77",
"\xE3\x8E\xBF" => "\x6D\x77",
"\xE3\x8F\x80" => "\x6B\xCF\x89",
"\xE3\x8F\x81" => "\x6D\xCF\x89",
"\xE3\x8F\x83" => "\x62\x71",
"\xE3\x8F\x86" => "\x63\xE2\x88\x95\x6B\x67",
"\xE3\x8F\x87" => "\x63\x6F\x2E",
"\xE3\x8F\x88" => "\x64\x62",
"\xE3\x8F\x89" => "\x67\x79",
"\xE3\x8F\x8B" => "\x68\x70",
"\xE3\x8F\x8D" => "\x6B\x6B",
"\xE3\x8F\x8E" => "\x6B\x6D",
"\xE3\x8F\x97" => "\x70\x68",
"\xE3\x8F\x99" => "\x70\x70\x6D",
"\xE3\x8F\x9A" => "\x70\x72",
"\xE3\x8F\x9C" => "\x73\x76",
"\xE3\x8F\x9D" => "\x77\x62",
"\xE3\x8F\x9E" => "\x76\xE2\x88\x95\x6D",
"\xE3\x8F\x9F" => "\x61\xE2\x88\x95\x6D",
"\xF0\x9D\x90\x80" => "\x61",
"\xF0\x9D\x90\x81" => "\x62",
"\xF0\x9D\x90\x82" => "\x63",
"\xF0\x9D\x90\x83" => "\x64",
"\xF0\x9D\x90\x84" => "\x65",
"\xF0\x9D\x90\x85" => "\x66",
"\xF0\x9D\x90\x86" => "\x67",
"\xF0\x9D\x90\x87" => "\x68",
"\xF0\x9D\x90\x88" => "\x69",
"\xF0\x9D\x90\x89" => "\x6A",
"\xF0\x9D\x90\x8A" => "\x6B",
"\xF0\x9D\x90\x8B" => "\x6C",
"\xF0\x9D\x90\x8C" => "\x6D",
"\xF0\x9D\x90\x8D" => "\x6E",
"\xF0\x9D\x90\x8E" => "\x6F",
"\xF0\x9D\x90\x8F" => "\x70",
"\xF0\x9D\x90\x90" => "\x71",
"\xF0\x9D\x90\x91" => "\x72",
"\xF0\x9D\x90\x92" => "\x73",
"\xF0\x9D\x90\x93" => "\x74",
"\xF0\x9D\x90\x94" => "\x75",
"\xF0\x9D\x90\x95" => "\x76",
"\xF0\x9D\x90\x96" => "\x77",
"\xF0\x9D\x90\x97" => "\x78",
"\xF0\x9D\x90\x98" => "\x79",
"\xF0\x9D\x90\x99" => "\x7A",
"\xF0\x9D\x90\xB4" => "\x61",
"\xF0\x9D\x90\xB5" => "\x62",
"\xF0\x9D\x90\xB6" => "\x63",
"\xF0\x9D\x90\xB7" => "\x64",
"\xF0\x9D\x90\xB8" => "\x65",
"\xF0\x9D\x90\xB9" => "\x66",
"\xF0\x9D\x90\xBA" => "\x67",
"\xF0\x9D\x90\xBB" => "\x68",
"\xF0\x9D\x90\xBC" => "\x69",
"\xF0\x9D\x90\xBD" => "\x6A",
"\xF0\x9D\x90\xBE" => "\x6B",
"\xF0\x9D\x90\xBF" => "\x6C",
"\xF0\x9D\x91\x80" => "\x6D",
"\xF0\x9D\x91\x81" => "\x6E",
"\xF0\x9D\x91\x82" => "\x6F",
"\xF0\x9D\x91\x83" => "\x70",
"\xF0\x9D\x91\x84" => "\x71",
"\xF0\x9D\x91\x85" => "\x72",
"\xF0\x9D\x91\x86" => "\x73",
"\xF0\x9D\x91\x87" => "\x74",
"\xF0\x9D\x91\x88" => "\x75",
"\xF0\x9D\x91\x89" => "\x76",
"\xF0\x9D\x91\x8A" => "\x77",
"\xF0\x9D\x91\x8B" => "\x78",
"\xF0\x9D\x91\x8C" => "\x79",
"\xF0\x9D\x91\x8D" => "\x7A",
"\xF0\x9D\x91\xA8" => "\x61",
"\xF0\x9D\x91\xA9" => "\x62",
"\xF0\x9D\x91\xAA" => "\x63",
"\xF0\x9D\x91\xAB" => "\x64",
"\xF0\x9D\x91\xAC" => "\x65",
"\xF0\x9D\x91\xAD" => "\x66",
"\xF0\x9D\x91\xAE" => "\x67",
"\xF0\x9D\x91\xAF" => "\x68",
"\xF0\x9D\x91\xB0" => "\x69",
"\xF0\x9D\x91\xB1" => "\x6A",
"\xF0\x9D\x91\xB2" => "\x6B",
"\xF0\x9D\x91\xB3" => "\x6C",
"\xF0\x9D\x91\xB4" => "\x6D",
"\xF0\x9D\x91\xB5" => "\x6E",
"\xF0\x9D\x91\xB6" => "\x6F",
"\xF0\x9D\x91\xB7" => "\x70",
"\xF0\x9D\x91\xB8" => "\x71",
"\xF0\x9D\x91\xB9" => "\x72",
"\xF0\x9D\x91\xBA" => "\x73",
"\xF0\x9D\x91\xBB" => "\x74",
"\xF0\x9D\x91\xBC" => "\x75",
"\xF0\x9D\x91\xBD" => "\x76",
"\xF0\x9D\x91\xBE" => "\x77",
"\xF0\x9D\x91\xBF" => "\x78",
"\xF0\x9D\x92\x80" => "\x79",
"\xF0\x9D\x92\x81" => "\x7A",
"\xF0\x9D\x92\x9C" => "\x61",
"\xF0\x9D\x92\x9E" => "\x63",
"\xF0\x9D\x92\x9F" => "\x64",
"\xF0\x9D\x92\xA2" => "\x67",
"\xF0\x9D\x92\xA5" => "\x6A",
"\xF0\x9D\x92\xA6" => "\x6B",
"\xF0\x9D\x92\xA9" => "\x6E",
"\xF0\x9D\x92\xAA" => "\x6F",
"\xF0\x9D\x92\xAB" => "\x70",
"\xF0\x9D\x92\xAC" => "\x71",
"\xF0\x9D\x92\xAE" => "\x73",
"\xF0\x9D\x92\xAF" => "\x74",
"\xF0\x9D\x92\xB0" => "\x75",
"\xF0\x9D\x92\xB1" => "\x76",
"\xF0\x9D\x92\xB2" => "\x77",
"\xF0\x9D\x92\xB3" => "\x78",
"\xF0\x9D\x92\xB4" => "\x79",
"\xF0\x9D\x92\xB5" => "\x7A",
"\xF0\x9D\x93\x90" => "\x61",
"\xF0\x9D\x93\x91" => "\x62",
"\xF0\x9D\x93\x92" => "\x63",
"\xF0\x9D\x93\x93" => "\x64",
"\xF0\x9D\x93\x94" => "\x65",
"\xF0\x9D\x93\x95" => "\x66",
"\xF0\x9D\x93\x96" => "\x67",
"\xF0\x9D\x93\x97" => "\x68",
"\xF0\x9D\x93\x98" => "\x69",
"\xF0\x9D\x93\x99" => "\x6A",
"\xF0\x9D\x93\x9A" => "\x6B",
"\xF0\x9D\x93\x9B" => "\x6C",
"\xF0\x9D\x93\x9C" => "\x6D",
"\xF0\x9D\x93\x9D" => "\x6E",
"\xF0\x9D\x93\x9E" => "\x6F",
"\xF0\x9D\x93\x9F" => "\x70",
"\xF0\x9D\x93\xA0" => "\x71",
"\xF0\x9D\x93\xA1" => "\x72",
"\xF0\x9D\x93\xA2" => "\x73",
"\xF0\x9D\x93\xA3" => "\x74",
"\xF0\x9D\x93\xA4" => "\x75",
"\xF0\x9D\x93\xA5" => "\x76",
"\xF0\x9D\x93\xA6" => "\x77",
"\xF0\x9D\x93\xA7" => "\x78",
"\xF0\x9D\x93\xA8" => "\x79",
"\xF0\x9D\x93\xA9" => "\x7A",
"\xF0\x9D\x94\x84" => "\x61",
"\xF0\x9D\x94\x85" => "\x62",
"\xF0\x9D\x94\x87" => "\x64",
"\xF0\x9D\x94\x88" => "\x65",
"\xF0\x9D\x94\x89" => "\x66",
"\xF0\x9D\x94\x8A" => "\x67",
"\xF0\x9D\x94\x8D" => "\x6A",
"\xF0\x9D\x94\x8E" => "\x6B",
"\xF0\x9D\x94\x8F" => "\x6C",
"\xF0\x9D\x94\x90" => "\x6D",
"\xF0\x9D\x94\x91" => "\x6E",
"\xF0\x9D\x94\x92" => "\x6F",
"\xF0\x9D\x94\x93" => "\x70",
"\xF0\x9D\x94\x94" => "\x71",
"\xF0\x9D\x94\x96" => "\x73",
"\xF0\x9D\x94\x97" => "\x74",
"\xF0\x9D\x94\x98" => "\x75",
"\xF0\x9D\x94\x99" => "\x76",
"\xF0\x9D\x94\x9A" => "\x77",
"\xF0\x9D\x94\x9B" => "\x78",
"\xF0\x9D\x94\x9C" => "\x79",
"\xF0\x9D\x94\xB8" => "\x61",
"\xF0\x9D\x94\xB9" => "\x62",
"\xF0\x9D\x94\xBB" => "\x64",
"\xF0\x9D\x94\xBC" => "\x65",
"\xF0\x9D\x94\xBD" => "\x66",
"\xF0\x9D\x94\xBE" => "\x67",
"\xF0\x9D\x95\x80" => "\x69",
"\xF0\x9D\x95\x81" => "\x6A",
"\xF0\x9D\x95\x82" => "\x6B",
"\xF0\x9D\x95\x83" => "\x6C",
"\xF0\x9D\x95\x84" => "\x6D",
"\xF0\x9D\x95\x86" => "\x6F",
"\xF0\x9D\x95\x8A" => "\x73",
"\xF0\x9D\x95\x8B" => "\x74",
"\xF0\x9D\x95\x8C" => "\x75",
"\xF0\x9D\x95\x8D" => "\x76",
"\xF0\x9D\x95\x8E" => "\x77",
"\xF0\x9D\x95\x8F" => "\x78",
"\xF0\x9D\x95\x90" => "\x79",
"\xF0\x9D\x95\xAC" => "\x61",
"\xF0\x9D\x95\xAD" => "\x62",
"\xF0\x9D\x95\xAE" => "\x63",
"\xF0\x9D\x95\xAF" => "\x64",
"\xF0\x9D\x95\xB0" => "\x65",
"\xF0\x9D\x95\xB1" => "\x66",
"\xF0\x9D\x95\xB2" => "\x67",
"\xF0\x9D\x95\xB3" => "\x68",
"\xF0\x9D\x95\xB4" => "\x69",
"\xF0\x9D\x95\xB5" => "\x6A",
"\xF0\x9D\x95\xB6" => "\x6B",
"\xF0\x9D\x95\xB7" => "\x6C",
"\xF0\x9D\x95\xB8" => "\x6D",
"\xF0\x9D\x95\xB9" => "\x6E",
"\xF0\x9D\x95\xBA" => "\x6F",
"\xF0\x9D\x95\xBB" => "\x70",
"\xF0\x9D\x95\xBC" => "\x71",
"\xF0\x9D\x95\xBD" => "\x72",
"\xF0\x9D\x95\xBE" => "\x73",
"\xF0\x9D\x95\xBF" => "\x74",
"\xF0\x9D\x96\x80" => "\x75",
"\xF0\x9D\x96\x81" => "\x76",
"\xF0\x9D\x96\x82" => "\x77",
"\xF0\x9D\x96\x83" => "\x78",
"\xF0\x9D\x96\x84" => "\x79",
"\xF0\x9D\x96\x85" => "\x7A",
"\xF0\x9D\x96\xA0" => "\x61",
"\xF0\x9D\x96\xA1" => "\x62",
"\xF0\x9D\x96\xA2" => "\x63",
"\xF0\x9D\x96\xA3" => "\x64",
"\xF0\x9D\x96\xA4" => "\x65",
"\xF0\x9D\x96\xA5" => "\x66",
"\xF0\x9D\x96\xA6" => "\x67",
"\xF0\x9D\x96\xA7" => "\x68",
"\xF0\x9D\x96\xA8" => "\x69",
"\xF0\x9D\x96\xA9" => "\x6A",
"\xF0\x9D\x96\xAA" => "\x6B",
"\xF0\x9D\x96\xAB" => "\x6C",
"\xF0\x9D\x96\xAC" => "\x6D",
"\xF0\x9D\x96\xAD" => "\x6E",
"\xF0\x9D\x96\xAE" => "\x6F",
"\xF0\x9D\x96\xAF" => "\x70",
"\xF0\x9D\x96\xB0" => "\x71",
"\xF0\x9D\x96\xB1" => "\x72",
"\xF0\x9D\x96\xB2" => "\x73",
"\xF0\x9D\x96\xB3" => "\x74",
"\xF0\x9D\x96\xB4" => "\x75",
"\xF0\x9D\x96\xB5" => "\x76",
"\xF0\x9D\x96\xB6" => "\x77",
"\xF0\x9D\x96\xB7" => "\x78",
"\xF0\x9D\x96\xB8" => "\x79",
"\xF0\x9D\x96\xB9" => "\x7A",
"\xF0\x9D\x97\x94" => "\x61",
"\xF0\x9D\x97\x95" => "\x62",
"\xF0\x9D\x97\x96" => "\x63",
"\xF0\x9D\x97\x97" => "\x64",
"\xF0\x9D\x97\x98" => "\x65",
"\xF0\x9D\x97\x99" => "\x66",
"\xF0\x9D\x97\x9A" => "\x67",
"\xF0\x9D\x97\x9B" => "\x68",
"\xF0\x9D\x97\x9C" => "\x69",
"\xF0\x9D\x97\x9D" => "\x6A",
"\xF0\x9D\x97\x9E" => "\x6B",
"\xF0\x9D\x97\x9F" => "\x6C",
"\xF0\x9D\x97\xA0" => "\x6D",
"\xF0\x9D\x97\xA1" => "\x6E",
"\xF0\x9D\x97\xA2" => "\x6F",
"\xF0\x9D\x97\xA3" => "\x70",
"\xF0\x9D\x97\xA4" => "\x71",
"\xF0\x9D\x97\xA5" => "\x72",
"\xF0\x9D\x97\xA6" => "\x73",
"\xF0\x9D\x97\xA7" => "\x74",
"\xF0\x9D\x97\xA8" => "\x75",
"\xF0\x9D\x97\xA9" => "\x76",
"\xF0\x9D\x97\xAA" => "\x77",
"\xF0\x9D\x97\xAB" => "\x78",
"\xF0\x9D\x97\xAC" => "\x79",
"\xF0\x9D\x97\xAD" => "\x7A",
"\xF0\x9D\x98\x88" => "\x61",
"\xF0\x9D\x98\x89" => "\x62",
"\xF0\x9D\x98\x8A" => "\x63",
"\xF0\x9D\x98\x8B" => "\x64",
"\xF0\x9D\x98\x8C" => "\x65",
"\xF0\x9D\x98\x8D" => "\x66",
"\xF0\x9D\x98\x8E" => "\x67",
"\xF0\x9D\x98\x8F" => "\x68",
"\xF0\x9D\x98\x90" => "\x69",
"\xF0\x9D\x98\x91" => "\x6A",
"\xF0\x9D\x98\x92" => "\x6B",
"\xF0\x9D\x98\x93" => "\x6C",
"\xF0\x9D\x98\x94" => "\x6D",
"\xF0\x9D\x98\x95" => "\x6E",
"\xF0\x9D\x98\x96" => "\x6F",
"\xF0\x9D\x98\x97" => "\x70",
"\xF0\x9D\x98\x98" => "\x71",
"\xF0\x9D\x98\x99" => "\x72",
"\xF0\x9D\x98\x9A" => "\x73",
"\xF0\x9D\x98\x9B" => "\x74",
"\xF0\x9D\x98\x9C" => "\x75",
"\xF0\x9D\x98\x9D" => "\x76",
"\xF0\x9D\x98\x9E" => "\x77",
"\xF0\x9D\x98\x9F" => "\x78",
"\xF0\x9D\x98\xA0" => "\x79",
"\xF0\x9D\x98\xA1" => "\x7A",
"\xF0\x9D\x98\xBC" => "\x61",
"\xF0\x9D\x98\xBD" => "\x62",
"\xF0\x9D\x98\xBE" => "\x63",
"\xF0\x9D\x98\xBF" => "\x64",
"\xF0\x9D\x99\x80" => "\x65",
"\xF0\x9D\x99\x81" => "\x66",
"\xF0\x9D\x99\x82" => "\x67",
"\xF0\x9D\x99\x83" => "\x68",
"\xF0\x9D\x99\x84" => "\x69",
"\xF0\x9D\x99\x85" => "\x6A",
"\xF0\x9D\x99\x86" => "\x6B",
"\xF0\x9D\x99\x87" => "\x6C",
"\xF0\x9D\x99\x88" => "\x6D",
"\xF0\x9D\x99\x89" => "\x6E",
"\xF0\x9D\x99\x8A" => "\x6F",
"\xF0\x9D\x99\x8B" => "\x70",
"\xF0\x9D\x99\x8C" => "\x71",
"\xF0\x9D\x99\x8D" => "\x72",
"\xF0\x9D\x99\x8E" => "\x73",
"\xF0\x9D\x99\x8F" => "\x74",
"\xF0\x9D\x99\x90" => "\x75",
"\xF0\x9D\x99\x91" => "\x76",
"\xF0\x9D\x99\x92" => "\x77",
"\xF0\x9D\x99\x93" => "\x78",
"\xF0\x9D\x99\x94" => "\x79",
"\xF0\x9D\x99\x95" => "\x7A",
"\xF0\x9D\x99\xB0" => "\x61",
"\xF0\x9D\x99\xB1" => "\x62",
"\xF0\x9D\x99\xB2" => "\x63",
"\xF0\x9D\x99\xB3" => "\x64",
"\xF0\x9D\x99\xB4" => "\x65",
"\xF0\x9D\x99\xB5" => "\x66",
"\xF0\x9D\x99\xB6" => "\x67",
"\xF0\x9D\x99\xB7" => "\x68",
"\xF0\x9D\x99\xB8" => "\x69",
"\xF0\x9D\x99\xB9" => "\x6A",
"\xF0\x9D\x99\xBA" => "\x6B",
"\xF0\x9D\x99\xBB" => "\x6C",
"\xF0\x9D\x99\xBC" => "\x6D",
"\xF0\x9D\x99\xBD" => "\x6E",
"\xF0\x9D\x99\xBE" => "\x6F",
"\xF0\x9D\x99\xBF" => "\x70",
"\xF0\x9D\x9A\x80" => "\x71",
"\xF0\x9D\x9A\x81" => "\x72",
"\xF0\x9D\x9A\x82" => "\x73",
"\xF0\x9D\x9A\x83" => "\x74",
"\xF0\x9D\x9A\x84" => "\x75",
"\xF0\x9D\x9A\x85" => "\x76",
"\xF0\x9D\x9A\x86" => "\x77",
"\xF0\x9D\x9A\x87" => "\x78",
"\xF0\x9D\x9A\x88" => "\x79",
"\xF0\x9D\x9A\x89" => "\x7A",
"\xF0\x9D\x9A\xA8" => "\xCE\xB1",
"\xF0\x9D\x9A\xA9" => "\xCE\xB2",
"\xF0\x9D\x9A\xAA" => "\xCE\xB3",
"\xF0\x9D\x9A\xAB" => "\xCE\xB4",
"\xF0\x9D\x9A\xAC" => "\xCE\xB5",
"\xF0\x9D\x9A\xAD" => "\xCE\xB6",
"\xF0\x9D\x9A\xAE" => "\xCE\xB7",
"\xF0\x9D\x9A\xAF" => "\xCE\xB8",
"\xF0\x9D\x9A\xB0" => "\xCE\xB9",
"\xF0\x9D\x9A\xB1" => "\xCE\xBA",
"\xF0\x9D\x9A\xB2" => "\xCE\xBB",
"\xF0\x9D\x9A\xB3" => "\xCE\xBC",
"\xF0\x9D\x9A\xB4" => "\xCE\xBD",
"\xF0\x9D\x9A\xB5" => "\xCE\xBE",
"\xF0\x9D\x9A\xB6" => "\xCE\xBF",
"\xF0\x9D\x9A\xB7" => "\xCF\x80",
"\xF0\x9D\x9A\xB8" => "\xCF\x81",
"\xF0\x9D\x9A\xB9" => "\xCE\xB8",
"\xF0\x9D\x9A\xBA" => "\xCF\x83",
"\xF0\x9D\x9A\xBB" => "\xCF\x84",
"\xF0\x9D\x9A\xBC" => "\xCF\x85",
"\xF0\x9D\x9A\xBD" => "\xCF\x86",
"\xF0\x9D\x9A\xBE" => "\xCF\x87",
"\xF0\x9D\x9A\xBF" => "\xCF\x88",
"\xF0\x9D\x9B\x80" => "\xCF\x89",
"\xF0\x9D\x9B\x93" => "\xCF\x83",
"\xF0\x9D\x9B\xA2" => "\xCE\xB1",
"\xF0\x9D\x9B\xA3" => "\xCE\xB2",
"\xF0\x9D\x9B\xA4" => "\xCE\xB3",
"\xF0\x9D\x9B\xA5" => "\xCE\xB4",
"\xF0\x9D\x9B\xA6" => "\xCE\xB5",
"\xF0\x9D\x9B\xA7" => "\xCE\xB6",
"\xF0\x9D\x9B\xA8" => "\xCE\xB7",
"\xF0\x9D\x9B\xA9" => "\xCE\xB8",
"\xF0\x9D\x9B\xAA" => "\xCE\xB9",
"\xF0\x9D\x9B\xAB" => "\xCE\xBA",
"\xF0\x9D\x9B\xAC" => "\xCE\xBB",
"\xF0\x9D\x9B\xAD" => "\xCE\xBC",
"\xF0\x9D\x9B\xAE" => "\xCE\xBD",
"\xF0\x9D\x9B\xAF" => "\xCE\xBE",
"\xF0\x9D\x9B\xB0" => "\xCE\xBF",
"\xF0\x9D\x9B\xB1" => "\xCF\x80",
"\xF0\x9D\x9B\xB2" => "\xCF\x81",
"\xF0\x9D\x9B\xB3" => "\xCE\xB8",
"\xF0\x9D\x9B\xB4" => "\xCF\x83",
"\xF0\x9D\x9B\xB5" => "\xCF\x84",
"\xF0\x9D\x9B\xB6" => "\xCF\x85",
"\xF0\x9D\x9B\xB7" => "\xCF\x86",
"\xF0\x9D\x9B\xB8" => "\xCF\x87",
"\xF0\x9D\x9B\xB9" => "\xCF\x88",
"\xF0\x9D\x9B\xBA" => "\xCF\x89",
"\xF0\x9D\x9C\x8D" => "\xCF\x83",
"\xF0\x9D\x9C\x9C" => "\xCE\xB1",
"\xF0\x9D\x9C\x9D" => "\xCE\xB2",
"\xF0\x9D\x9C\x9E" => "\xCE\xB3",
"\xF0\x9D\x9C\x9F" => "\xCE\xB4",
"\xF0\x9D\x9C\xA0" => "\xCE\xB5",
"\xF0\x9D\x9C\xA1" => "\xCE\xB6",
"\xF0\x9D\x9C\xA2" => "\xCE\xB7",
"\xF0\x9D\x9C\xA3" => "\xCE\xB8",
"\xF0\x9D\x9C\xA4" => "\xCE\xB9",
"\xF0\x9D\x9C\xA5" => "\xCE\xBA",
"\xF0\x9D\x9C\xA6" => "\xCE\xBB",
"\xF0\x9D\x9C\xA7" => "\xCE\xBC",
"\xF0\x9D\x9C\xA8" => "\xCE\xBD",
"\xF0\x9D\x9C\xA9" => "\xCE\xBE",
"\xF0\x9D\x9C\xAA" => "\xCE\xBF",
"\xF0\x9D\x9C\xAB" => "\xCF\x80",
"\xF0\x9D\x9C\xAC" => "\xCF\x81",
"\xF0\x9D\x9C\xAD" => "\xCE\xB8",
"\xF0\x9D\x9C\xAE" => "\xCF\x83",
"\xF0\x9D\x9C\xAF" => "\xCF\x84",
"\xF0\x9D\x9C\xB0" => "\xCF\x85",
"\xF0\x9D\x9C\xB1" => "\xCF\x86",
"\xF0\x9D\x9C\xB2" => "\xCF\x87",
"\xF0\x9D\x9C\xB3" => "\xCF\x88",
"\xF0\x9D\x9C\xB4" => "\xCF\x89",
"\xF0\x9D\x9D\x87" => "\xCF\x83",
"\xF0\x9D\x9D\x96" => "\xCE\xB1",
"\xF0\x9D\x9D\x97" => "\xCE\xB2",
"\xF0\x9D\x9D\x98" => "\xCE\xB3",
"\xF0\x9D\x9D\x99" => "\xCE\xB4",
"\xF0\x9D\x9D\x9A" => "\xCE\xB5",
"\xF0\x9D\x9D\x9B" => "\xCE\xB6",
"\xF0\x9D\x9D\x9C" => "\xCE\xB7",
"\xF0\x9D\x9D\x9D" => "\xCE\xB8",
"\xF0\x9D\x9D\x9E" => "\xCE\xB9",
"\xF0\x9D\x9D\x9F" => "\xCE\xBA",
"\xF0\x9D\x9D\xA0" => "\xCE\xBB",
"\xF0\x9D\x9D\xA1" => "\xCE\xBC",
"\xF0\x9D\x9D\xA2" => "\xCE\xBD",
"\xF0\x9D\x9D\xA3" => "\xCE\xBE",
"\xF0\x9D\x9D\xA4" => "\xCE\xBF",
"\xF0\x9D\x9D\xA5" => "\xCF\x80",
"\xF0\x9D\x9D\xA6" => "\xCF\x81",
"\xF0\x9D\x9D\xA7" => "\xCE\xB8",
"\xF0\x9D\x9D\xA8" => "\xCF\x83",
"\xF0\x9D\x9D\xA9" => "\xCF\x84",
"\xF0\x9D\x9D\xAA" => "\xCF\x85",
"\xF0\x9D\x9D\xAB" => "\xCF\x86",
"\xF0\x9D\x9D\xAC" => "\xCF\x87",
"\xF0\x9D\x9D\xAD" => "\xCF\x88",
"\xF0\x9D\x9D\xAE" => "\xCF\x89",
"\xF0\x9D\x9E\x81" => "\xCF\x83",
"\xF0\x9D\x9E\x90" => "\xCE\xB1",
"\xF0\x9D\x9E\x91" => "\xCE\xB2",
"\xF0\x9D\x9E\x92" => "\xCE\xB3",
"\xF0\x9D\x9E\x93" => "\xCE\xB4",
"\xF0\x9D\x9E\x94" => "\xCE\xB5",
"\xF0\x9D\x9E\x95" => "\xCE\xB6",
"\xF0\x9D\x9E\x96" => "\xCE\xB7",
"\xF0\x9D\x9E\x97" => "\xCE\xB8",
"\xF0\x9D\x9E\x98" => "\xCE\xB9",
"\xF0\x9D\x9E\x99" => "\xCE\xBA",
"\xF0\x9D\x9E\x9A" => "\xCE\xBB",
"\xF0\x9D\x9E\x9B" => "\xCE\xBC",
"\xF0\x9D\x9E\x9C" => "\xCE\xBD",
"\xF0\x9D\x9E\x9D" => "\xCE\xBE",
"\xF0\x9D\x9E\x9E" => "\xCE\xBF",
"\xF0\x9D\x9E\x9F" => "\xCF\x80",
"\xF0\x9D\x9E\xA0" => "\xCF\x81",
"\xF0\x9D\x9E\xA1" => "\xCE\xB8",
"\xF0\x9D\x9E\xA2" => "\xCF\x83",
"\xF0\x9D\x9E\xA3" => "\xCF\x84",
"\xF0\x9D\x9E\xA4" => "\xCF\x85",
"\xF0\x9D\x9E\xA5" => "\xCF\x86",
"\xF0\x9D\x9E\xA6" => "\xCF\x87",
"\xF0\x9D\x9E\xA7" => "\xCF\x88",
"\xF0\x9D\x9E\xA8" => "\xCF\x89",
"\xF0\x9D\x9E\xBB" => "\xCF\x83",
"\xF0\x9D\x9F\x8A" => "\xCF\x9D",
);
// do the case fold
$text = utf8_case_fold($text, $option);
// convert to NFKC
Normalizer::normalize($text, Normalizer::NFKC);
// FC_NFKC_Closure, http://www.unicode.org/Public/5.0.0/ucd/DerivedNormalizationProps.txt
$text = strtr($text, $fc_nfkc_closure);
return $text;
}
/**
* Assume the input is NFC:
* Takes the input and does a "special" case fold. It does minor normalization as well.
*
* @param string $text text to be case folded
* @param string $option determines how we will fold the cases
* @return string case folded text
*/
function utf8_case_fold_nfc($text, $option = 'full')
{
static $uniarray = array();
static $ypogegrammeni = array(
"\xCD\xBA" => "\x20\xCD\x85",
"\xE1\xBE\x80" => "\xE1\xBC\x80\xCD\x85",
"\xE1\xBE\x81" => "\xE1\xBC\x81\xCD\x85",
"\xE1\xBE\x82" => "\xE1\xBC\x82\xCD\x85",
"\xE1\xBE\x83" => "\xE1\xBC\x83\xCD\x85",
"\xE1\xBE\x84" => "\xE1\xBC\x84\xCD\x85",
"\xE1\xBE\x85" => "\xE1\xBC\x85\xCD\x85",
"\xE1\xBE\x86" => "\xE1\xBC\x86\xCD\x85",
"\xE1\xBE\x87" => "\xE1\xBC\x87\xCD\x85",
"\xE1\xBE\x88" => "\xE1\xBC\x88\xCD\x85",
"\xE1\xBE\x89" => "\xE1\xBC\x89\xCD\x85",
"\xE1\xBE\x8A" => "\xE1\xBC\x8A\xCD\x85",
"\xE1\xBE\x8B" => "\xE1\xBC\x8B\xCD\x85",
"\xE1\xBE\x8C" => "\xE1\xBC\x8C\xCD\x85",
"\xE1\xBE\x8D" => "\xE1\xBC\x8D\xCD\x85",
"\xE1\xBE\x8E" => "\xE1\xBC\x8E\xCD\x85",
"\xE1\xBE\x8F" => "\xE1\xBC\x8F\xCD\x85",
"\xE1\xBE\x90" => "\xE1\xBC\xA0\xCD\x85",
"\xE1\xBE\x91" => "\xE1\xBC\xA1\xCD\x85",
"\xE1\xBE\x92" => "\xE1\xBC\xA2\xCD\x85",
"\xE1\xBE\x93" => "\xE1\xBC\xA3\xCD\x85",
"\xE1\xBE\x94" => "\xE1\xBC\xA4\xCD\x85",
"\xE1\xBE\x95" => "\xE1\xBC\xA5\xCD\x85",
"\xE1\xBE\x96" => "\xE1\xBC\xA6\xCD\x85",
"\xE1\xBE\x97" => "\xE1\xBC\xA7\xCD\x85",
"\xE1\xBE\x98" => "\xE1\xBC\xA8\xCD\x85",
"\xE1\xBE\x99" => "\xE1\xBC\xA9\xCD\x85",
"\xE1\xBE\x9A" => "\xE1\xBC\xAA\xCD\x85",
"\xE1\xBE\x9B" => "\xE1\xBC\xAB\xCD\x85",
"\xE1\xBE\x9C" => "\xE1\xBC\xAC\xCD\x85",
"\xE1\xBE\x9D" => "\xE1\xBC\xAD\xCD\x85",
"\xE1\xBE\x9E" => "\xE1\xBC\xAE\xCD\x85",
"\xE1\xBE\x9F" => "\xE1\xBC\xAF\xCD\x85",
"\xE1\xBE\xA0" => "\xE1\xBD\xA0\xCD\x85",
"\xE1\xBE\xA1" => "\xE1\xBD\xA1\xCD\x85",
"\xE1\xBE\xA2" => "\xE1\xBD\xA2\xCD\x85",
"\xE1\xBE\xA3" => "\xE1\xBD\xA3\xCD\x85",
"\xE1\xBE\xA4" => "\xE1\xBD\xA4\xCD\x85",
"\xE1\xBE\xA5" => "\xE1\xBD\xA5\xCD\x85",
"\xE1\xBE\xA6" => "\xE1\xBD\xA6\xCD\x85",
"\xE1\xBE\xA7" => "\xE1\xBD\xA7\xCD\x85",
"\xE1\xBE\xA8" => "\xE1\xBD\xA8\xCD\x85",
"\xE1\xBE\xA9" => "\xE1\xBD\xA9\xCD\x85",
"\xE1\xBE\xAA" => "\xE1\xBD\xAA\xCD\x85",
"\xE1\xBE\xAB" => "\xE1\xBD\xAB\xCD\x85",
"\xE1\xBE\xAC" => "\xE1\xBD\xAC\xCD\x85",
"\xE1\xBE\xAD" => "\xE1\xBD\xAD\xCD\x85",
"\xE1\xBE\xAE" => "\xE1\xBD\xAE\xCD\x85",
"\xE1\xBE\xAF" => "\xE1\xBD\xAF\xCD\x85",
"\xE1\xBE\xB2" => "\xE1\xBD\xB0\xCD\x85",
"\xE1\xBE\xB3" => "\xCE\xB1\xCD\x85",
"\xE1\xBE\xB4" => "\xCE\xAC\xCD\x85",
"\xE1\xBE\xB7" => "\xE1\xBE\xB6\xCD\x85",
"\xE1\xBE\xBC" => "\xCE\x91\xCD\x85",
"\xE1\xBF\x82" => "\xE1\xBD\xB4\xCD\x85",
"\xE1\xBF\x83" => "\xCE\xB7\xCD\x85",
"\xE1\xBF\x84" => "\xCE\xAE\xCD\x85",
"\xE1\xBF\x87" => "\xE1\xBF\x86\xCD\x85",
"\xE1\xBF\x8C" => "\xCE\x97\xCD\x85",
"\xE1\xBF\xB2" => "\xE1\xBD\xBC\xCD\x85",
"\xE1\xBF\xB3" => "\xCF\x89\xCD\x85",
"\xE1\xBF\xB4" => "\xCF\x8E\xCD\x85",
"\xE1\xBF\xB7" => "\xE1\xBF\xB6\xCD\x85",
"\xE1\xBF\xBC" => "\xCE\xA9\xCD\x85",
);
// perform a small trick, avoid further normalization on composed points that contain U+0345 in their decomposition
$text = strtr($text, $ypogegrammeni);
// do the case fold
$text = utf8_case_fold($text, $option);
return $text;
}
/**
* wrapper around PHP's native normalizer from intl
* previously a PECL extension, included in the core since PHP 5.3.0
* http://php.net/manual/en/normalizer.normalize.php
*
* @param mixed $strings a string or an array of strings to normalize
* @return mixed the normalized content, preserving array keys if array given.
*/
function utf8_normalize_nfc($strings)
{
if (empty($strings))
{
return $strings;
}
if (!is_array($strings))
{
if (Normalizer::isNormalized($strings))
{
return $strings;
}
return (string) Normalizer::normalize($strings);
}
else
{
foreach ($strings as $key => $string)
{
if (is_array($string))
{
foreach ($string as $_key => $_string)
{
if (Normalizer::isNormalized($strings[$key][$_key]))
{
continue;
}
$strings[$key][$_key] = (string) Normalizer::normalize($strings[$key][$_key]);
}
}
else
{
if (Normalizer::isNormalized($strings[$key]))
{
continue;
}
$strings[$key] = (string) Normalizer::normalize($strings[$key]);
}
}
}
return $strings;
}
/**
* This function is used to generate a "clean" version of a string.
* Clean means that it is a case insensitive form (case folding) and that it is normalized (NFC).
* Additionally a homographs of one character are transformed into one specific character (preferably ASCII
* if it is an ASCII character).
*
* Please be aware that if you change something within this function or within
* functions used here you need to rebuild/update the username_clean column in the users table. And all other
* columns that store a clean string otherwise you will break this functionality.
*
* @param string $text An unclean string, mabye user input (has to be valid UTF-8!)
* @return string Cleaned up version of the input string
*/
function utf8_clean_string($text)
{
global $phpbb_root_path, $phpEx;
static $homographs = array();
if (empty($homographs))
{
$homographs = include($phpbb_root_path . 'includes/utf/data/confusables.' . $phpEx);
}
$text = utf8_case_fold_nfkc($text);
$text = strtr($text, $homographs);
// Other control characters
$text = preg_replace('#(?:[\x00-\x1F\x7F]+|(?:\xC2[\x80-\x9F])+)#', '', $text);
// we need to reduce multiple spaces to a single one
$text = preg_replace('# {2,}#', ' ', $text);
// we can use trim here as all the other space characters should have been turned
// into normal ASCII spaces by now
return trim($text);
}
/**
* A wrapper for htmlspecialchars($value, ENT_COMPAT, 'UTF-8')
*/
function utf8_htmlspecialchars($value)
{
return htmlspecialchars($value, ENT_COMPAT, 'UTF-8');
}
/**
* Trying to convert returned system message to utf8
*
* PHP assumes such messages are ISO-8859-1 so we'll do that too
* and if it breaks messages we'll blame it on them ;-)
*/
function utf8_convert_message($message)
{
// First of all check if conversion is neded at all, as there is no point
// in converting ASCII messages from ISO-8859-1 to UTF-8
if (!preg_match('/[\x80-\xFF]/', $message))
{
return utf8_htmlspecialchars($message);
}
// else we need to convert some part of the message
return utf8_htmlspecialchars(utf8_recode($message, 'ISO-8859-1'));
}
/**
* UTF8-compatible wordwrap replacement
*
* @param string $string The input string
* @param int $width The column width. Defaults to 75.
* @param string $break The line is broken using the optional break parameter. Defaults to '\n'.
* @param bool $cut If the cut is set to TRUE, the string is always wrapped at the specified width. So if you have a word that is larger than the given width, it is broken apart.
*
* @return string the given string wrapped at the specified column.
*
*/
function utf8_wordwrap($string, $width = 75, $break = "\n", $cut = false)
{
// We first need to explode on $break, not destroying existing (intended) breaks
$lines = explode($break, $string);
$new_lines = array(0 => '');
$index = 0;
foreach ($lines as $line)
{
$words = explode(' ', $line);
for ($i = 0, $size = sizeof($words); $i < $size; $i++)
{
$word = $words[$i];
// If cut is true we need to cut the word if it is > width chars
if ($cut && utf8_strlen($word) > $width)
{
$words[$i] = utf8_substr($word, $width);
$word = utf8_substr($word, 0, $width);
$i--;
}
if (utf8_strlen($new_lines[$index] . $word) > $width)
{
$new_lines[$index] = substr($new_lines[$index], 0, -1);
$index++;
$new_lines[$index] = '';
}
$new_lines[$index] .= $word . ' ';
}
$new_lines[$index] = substr($new_lines[$index], 0, -1);
$index++;
$new_lines[$index] = '';
}
unset($new_lines[$index]);
return implode($break, $new_lines);
}
/**
* UTF8-safe basename() function
*
* basename() has some limitations and is dependent on the locale setting
* according to the PHP manual. Therefore we provide our own locale independent
* basename function.
*
* @param string $filename The filename basename() should be applied to
* @return string The basenamed filename
*/
function utf8_basename($filename)
{
// We always check for forward slash AND backward slash
// because they could be mixed or "sneaked" in. ;)
// You know, never trust user input...
if (strpos($filename, '/') !== false)
{
$filename = utf8_substr($filename, utf8_strrpos($filename, '/') + 1);
}
if (strpos($filename, '\\') !== false)
{
$filename = utf8_substr($filename, utf8_strrpos($filename, '\\') + 1);
}
return $filename;
}
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