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<?php
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// $Id: functions-utf8.php 782 2008-03-31 16:35:55Z thorn $
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/*
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Website Baker Project <http://www.websitebaker.org/>
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Copyright (C) 2004-2008, Ryan Djurovich
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Website Baker is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Website Baker is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Website Baker; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* A part of this file is based on 'utf8.php' from the DokuWiki-project.
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* (http://www.splitbrain.org/projects/dokuwiki):
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**
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* UTF8 helper functions
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* @license LGPL (http://www.gnu.org/copyleft/lesser.html)
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* @author Andreas Gohr <andi@splitbrain.org>
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**
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* modified for use with Website Baker
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* from thorn, Jan. 2008
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*
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* most of the original functions appeared to be to slow with large strings, so i replaced them with my own ones
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* thorn, Mar. 2008
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*/
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// Functions we use in Website Baker:
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// entities_to_7bit()
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// entities_to_umlauts2()
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// umlauts_to_entities2()
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if(!defined('WB_URL')) {
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header('Location: ../index.php');
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exit(0);
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}
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/*
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* check for mb_string support
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*/
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//define('UTF8_NOMBSTRING',1); // uncomment this to forbid use of mb_string-functions
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if(!defined('UTF8_MBSTRING')){
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if(function_exists('mb_substr') && !defined('UTF8_NOMBSTRING')){
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define('UTF8_MBSTRING',1);
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}else{
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define('UTF8_MBSTRING',0);
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}
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}
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if(UTF8_MBSTRING){ mb_internal_encoding('UTF-8'); }
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require_once(WB_PATH.'/framework/charsets_table.php');
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/*
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* Checks if a string contains 7bit ASCII only
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*
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* @author thorn
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*/
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function utf8_isASCII($str){
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if(preg_match('/[\x80-\xFF]/', $str))
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return false;
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else
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return true;
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}
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/*
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* Tries to detect if a string is in Unicode encoding
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*
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* @author <bmorel@ssi.fr>
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* @link http://www.php.net/manual/en/function.utf8-encode.php
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*/
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function utf8_check($Str) {
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for ($i=0; $i<strlen($Str); $i++) {
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$b = ord($Str[$i]);
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if ($b < 0x80) continue; # 0bbbbbbb
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elseif (($b & 0xE0) == 0xC0) $n=1; # 110bbbbb
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elseif (($b & 0xF0) == 0xE0) $n=2; # 1110bbbb
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elseif (($b & 0xF8) == 0xF0) $n=3; # 11110bbb
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elseif (($b & 0xFC) == 0xF8) $n=4; # 111110bb
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elseif (($b & 0xFE) == 0xFC) $n=5; # 1111110b
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else return false; # Does not match any model
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for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ?
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if ((++$i == strlen($Str)) || ((ord($Str[$i]) & 0xC0) != 0x80))
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return false;
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}
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}
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return true;
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}
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/*
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* Romanize a non-latin string
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function utf8_romanize($string){
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if(utf8_isASCII($string)) return $string; //nothing to do
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global $UTF8_ROMANIZATION;
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return strtr($string,$UTF8_ROMANIZATION);
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}
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/*
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* Removes special characters (nonalphanumeric) from a UTF-8 string
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*
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* This function adds the controlchars 0x00 to 0x19 to the array of
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* stripped chars (they are not included in $UTF8_SPECIAL_CHARS2)
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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* @param string $string The UTF8 string to strip of special chars
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* @param string $repl Replace special with this string
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* @param string $additional Additional chars to strip (used in regexp char class)
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*/
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function utf8_stripspecials($string,$repl='',$additional=''){
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global $UTF8_SPECIAL_CHARS2;
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static $specials = null;
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if(is_null($specials)){
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$specials = preg_quote($UTF8_SPECIAL_CHARS2, '/');
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}
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return preg_replace('/['.$additional.'\x00-\x19'.$specials.']/u',$repl,$string);
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}
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/*
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* added functions - thorn
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*/
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/*
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* faster replacement for utf8_entities_to_umlauts()
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* not all features of utf8_entities_to_umlauts() --> utf8_unhtml() are supported!
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* @author thorn
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*/
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function utf8_fast_entities_to_umlauts($str) {
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if(UTF8_MBSTRING) {
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// we need this for use with mb_convert_encoding
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$str = str_replace(array('&','>','<','"',''',' '), array('&amp;','&gt;','&lt;','&quot;','&#39;','&nbsp;'), $str);
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// we need two mb_convert_encoding()-calls - is this a bug?
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// mb_convert_encoding("öö", 'UTF-8', 'HTML-ENTITIES'); // with string in utf-8-encoding doesn't work. Result: "öö"
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// Work-around: convert all umlauts to entities first ("öö"->"öö"), then all entities to umlauts ("öö"->"öö")
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return(mb_convert_encoding(mb_convert_encoding($str, 'HTML-ENTITIES', 'UTF-8'),'UTF-8', 'HTML-ENTITIES'));
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} else {
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global $named_entities;global $numbered_entities;
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$str = str_replace($named_entities, $numbered_entities, $str);
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$str = preg_replace("/&#([0-9]+);/e", "code_to_utf8($1)", $str);
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}
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return($str);
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}
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// support-function for utf8_fast_entities_to_umlauts()
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function code_to_utf8($num) {
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if ($num <= 0x7F) {
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return chr($num);
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} elseif ($num <= 0x7FF) {
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return chr(($num >> 6) + 192) . chr(($num & 63) + 128);
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} elseif ($num <= 0xFFFF) {
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return chr(($num >> 12) + 224) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
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} elseif ($num <= 0x1FFFFF) {
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return chr(($num >> 18) + 240) . chr((($num >> 12) & 63) + 128) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
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}
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return "?";
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}
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/*
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* faster replacement for utf8_umlauts_to_entities()
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* not all features of utf8_umlauts_to_entities() --> utf8_tohtml() are supported!
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* @author thorn
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*/
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function utf8_fast_umlauts_to_entities($string, $named_entities=true) {
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if(UTF8_MBSTRING)
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return(mb_convert_encoding($string, 'HTML-ENTITIES', 'UTF-8'));
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else {
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global $named_entities;global $numbered_entities;
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$new = "";
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$i=0;
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$len=strlen($string);
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if($len==0) return $string;
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do {
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if(ord($string{$i}) <= 127) $ud = $string{$i++};
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elseif(ord($string{$i}) <= 223) $ud = (ord($string{$i++})-192)*64 + (ord($string{$i++})-128);
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elseif(ord($string{$i}) <= 239) $ud = (ord($string{$i++})-224)*4096 + (ord($string{$i++})-128)*64 + (ord($string{$i++})-128);
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elseif(ord($string{$i}) <= 247) $ud = (ord($string{$i++})-240)*262144 + (ord($string{$i++})-128)*4096 + (ord($string{$i++})-128)*64 + (ord($string{$i++})-128);
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else $ud = ord($string{$i++}); // error!
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if($ud > 127) {
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$new .= "&#$ud;";
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} else {
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$new .= $ud;
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}
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} while($i < $len);
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$string = $new;
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if($named_entities)
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$string = str_replace($numbered_entities, $named_entities, $string);
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}
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return($string);
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}
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/*
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* Converts from various charsets to UTF-8
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*
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* Will convert a string from various charsets to UTF-8.
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* HTML-entities may be converted, too.
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* In case of error the returned string is unchanged, and a message is emitted.
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* Supported charsets are:
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* direct: iso_8859_1 iso_8859_2 iso_8859_3 iso_8859_4 iso_8859_5
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* iso_8859_6 iso_8859_7 iso_8859_8 iso_8859_9 iso_8859_10 iso_8859_11
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* mb_convert_encoding: all wb charsets (except those from 'direct'); but not GB2312
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* iconv: all wb charsets (except those from 'direct')
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*
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* @param string A string in supported encoding
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* @param string The charset to convert from, defaults to DEFAULT_CHARSET
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* @return string A string in UTF-8-encoding, with all entities decoded, too.
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* String is unchanged in case of error.
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* @author thorn
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*/
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function charset_to_utf8($str, $charset_in=DEFAULT_CHARSET, $decode_entities=true) {
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global $iso_8859_2_to_utf8, $iso_8859_3_to_utf8, $iso_8859_4_to_utf8, $iso_8859_5_to_utf8, $iso_8859_6_to_utf8, $iso_8859_7_to_utf8, $iso_8859_8_to_utf8, $iso_8859_9_to_utf8, $iso_8859_10_to_utf8, $iso_8859_11_to_utf8;
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$charset_in = strtoupper($charset_in);
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if ($charset_in == "") { $charset_in = 'UTF-8'; }
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$wrong_ISO8859 = false;
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$converted = false;
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if((!function_exists('iconv') && !UTF8_MBSTRING && ($charset_in=='BIG5' || $charset_in=='ISO-2022-JP' || $charset_in=='ISO-2022-KR')) || (!function_exists('iconv') && $charset_in=='GB2312')) {
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// Nothing we can do here :-(
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// Charset is one of those obscure ISO-2022... or BIG5, GB2312 or something
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// and we can't use mb_convert_encoding() or iconv();
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// Emit an error-message.
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trigger_error("Can't convert from $charset_in without mb_convert_encoding() or iconv(). Use UTF-8 instead.", E_USER_WARNING);
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return($str);
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}
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// check if we have UTF-8 or a plain ASCII string
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if($charset_in == 'UTF-8' || utf8_isASCII($str)) {
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// we have utf-8. Just replace HTML-entities and return
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if($decode_entities && preg_match('/&[#0-9a-zA-Z]+;/',$str))
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return(utf8_fast_entities_to_umlauts($str));
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else // nothing to do
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return($str);
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}
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// Convert $str to utf8
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if(substr($charset_in,0,8) == 'ISO-8859') {
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switch($charset_in) {
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case 'ISO-8859-1': $str=utf8_encode($str); break;
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case 'ISO-8859-2': $str=strtr($str, $iso_8859_2_to_utf8); break;
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case 'ISO-8859-3': $str=strtr($str, $iso_8859_3_to_utf8); break;
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case 'ISO-8859-4': $str=strtr($str, $iso_8859_4_to_utf8); break;
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case 'ISO-8859-5': $str=strtr($str, $iso_8859_5_to_utf8); break;
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case 'ISO-8859-6': $str=strtr($str, $iso_8859_6_to_utf8); break;
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case 'ISO-8859-7': $str=strtr($str, $iso_8859_7_to_utf8); break;
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case 'ISO-8859-8': $str=strtr($str, $iso_8859_8_to_utf8); break;
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case 'ISO-8859-9': $str=strtr($str, $iso_8859_9_to_utf8); break;
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case 'ISO-8859-10': $str=strtr($str, $iso_8859_10_to_utf8); break;
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case 'ISO-8859-11': $str=strtr($str, $iso_8859_11_to_utf8); break;
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default: $wrong_ISO8859 = true;
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}
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if(!$wrong_ISO8859)
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$converted = true;
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}
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if(!$converted && UTF8_MBSTRING && $charset_in != 'GB2312') {
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// $charset is neither UTF-8 nor a known ISO-8859...
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// Try mb_convert_encoding() - but there's no GB2312 encoding in php's mb_* functions
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$str = mb_convert_encoding($str, 'UTF-8', $charset_in);
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$converted = true;
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} elseif(!$converted) { // Try iconv
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if(function_exists('iconv')) {
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$str = iconv($charset_in, 'UTF-8', $str);
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$converted = true;
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}
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}
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if($converted) {
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// we have utf-8, now replace HTML-entities and return
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if($decode_entities && preg_match('/&[#0-9a-zA-Z]+;/',$str))
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$str = utf8_fast_entities_to_umlauts($str);
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return($str);
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}
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// Nothing we can do here :-(
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// Charset is one of those obscure ISO-2022... or BIG5, GB2312 or something
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// and we can't use mb_convert_encoding() or iconv();
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// Emit an error-message.
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trigger_error("Can't convert from $charset_in without mb_convert_encoding() or iconv(). Use UTF-8 instead.", E_USER_WARNING);
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293
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return $str;
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}
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/*
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298
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* Converts from UTF-8 to various charsets
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*
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300
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* Will convert a string from UTF-8 to various charsets.
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* HTML-entities will not! be converted.
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* In case of error the returned string is unchanged, and a message is emitted.
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* Supported charsets are:
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* direct: iso_8859_1 iso_8859_2 iso_8859_3 iso_8859_4 iso_8859_5
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* iso_8859_6 iso_8859_7 iso_8859_8 iso_8859_9 iso_8859_10 iso_8859_11
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* mb_convert_encoding: all wb charsets (except those from 'direct'); but not GB2312
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* iconv: all wb charsets (except those from 'direct')
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*
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* @param string An UTF-8 encoded string
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* @param string The charset to convert to, defaults to DEFAULT_CHARSET
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* @return string A string in a supported encoding, with all entities decoded, too.
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* String is unchanged in case of error.
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* @author thorn
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314
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*/
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315
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function utf8_to_charset($str, $charset_out=DEFAULT_CHARSET) {
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316
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global $utf8_to_iso_8859_2, $utf8_to_iso_8859_3, $utf8_to_iso_8859_4, $utf8_to_iso_8859_5, $utf8_to_iso_8859_6, $utf8_to_iso_8859_7, $utf8_to_iso_8859_8, $utf8_to_iso_8859_9, $utf8_to_iso_8859_10, $utf8_to_iso_8859_11;
|
|
317
|
$charset_out = strtoupper($charset_out);
|
|
318
|
$wrong_ISO8859 = false;
|
|
319
|
$converted = false;
|
|
320
|
|
|
321
|
if((!function_exists('iconv') && !UTF8_MBSTRING && ($charset_out=='BIG5' || $charset_out=='ISO-2022-JP' || $charset_out=='ISO-2022-KR')) || (!function_exists('iconv') && $charset_out=='GB2312')) {
|
|
322
|
// Nothing we can do here :-(
|
|
323
|
// Charset is one of those obscure ISO-2022... or BIG5, GB2312 or something
|
|
324
|
// and we can't use mb_convert_encoding() or iconv();
|
|
325
|
// Emit an error-message.
|
|
326
|
trigger_error("Can't convert into $charset_out without mb_convert_encoding() or iconv(). Use UTF-8 instead.", E_USER_WARNING);
|
|
327
|
return($str);
|
|
328
|
}
|
|
329
|
|
|
330
|
// the string comes from charset_to_utf8(), so we can skip this
|
|
331
|
// replace HTML-entities first
|
|
332
|
//if(preg_match('/&[#0-9a-zA-Z]+;/',$str))
|
|
333
|
// $str = utf8_entities_to_umlauts($str);
|
|
334
|
|
|
335
|
// check if we need to convert
|
|
336
|
if($charset_out == 'UTF-8' || utf8_isASCII($str)) {
|
|
337
|
// Nothing to do. Just return
|
|
338
|
return($str);
|
|
339
|
}
|
|
340
|
|
|
341
|
// Convert $str to $charset_out
|
|
342
|
if(substr($charset_out,0,8) == 'ISO-8859') {
|
|
343
|
switch($charset_out) {
|
|
344
|
case 'ISO-8859-1': $str=utf8_decode($str); break;
|
|
345
|
case 'ISO-8859-2': $str=strtr($str, $utf8_to_iso_8859_2); break;
|
|
346
|
case 'ISO-8859-3': $str=strtr($str, $utf8_to_iso_8859_3); break;
|
|
347
|
case 'ISO-8859-4': $str=strtr($str, $utf8_to_iso_8859_4); break;
|
|
348
|
case 'ISO-8859-5': $str=strtr($str, $utf8_to_iso_8859_5); break;
|
|
349
|
case 'ISO-8859-6': $str=strtr($str, $utf8_to_iso_8859_6); break;
|
|
350
|
case 'ISO-8859-7': $str=strtr($str, $utf8_to_iso_8859_7); break;
|
|
351
|
case 'ISO-8859-8': $str=strtr($str, $utf8_to_iso_8859_8); break;
|
|
352
|
case 'ISO-8859-9': $str=strtr($str, $utf8_to_iso_8859_9); break;
|
|
353
|
case 'ISO-8859-10': $str=strtr($str, $utf8_to_iso_8859_10); break;
|
|
354
|
case 'ISO-8859-11': $str=strtr($str, $utf8_to_iso_8859_11); break;
|
|
355
|
default: $wrong_ISO8859 = true;
|
|
356
|
}
|
|
357
|
if(!$wrong_ISO8859)
|
|
358
|
$converted = true;
|
|
359
|
}
|
|
360
|
if(!$converted && UTF8_MBSTRING && $charset_out != 'GB2312') {
|
|
361
|
// $charset is neither UTF-8 nor a known ISO-8859...
|
|
362
|
// Try mb_convert_encoding() - but there's no GB2312 encoding in php's mb_* functions
|
|
363
|
$str = mb_convert_encoding($str, $charset_out, 'UTF-8');
|
|
364
|
$converted = true;
|
|
365
|
} elseif(!$converted) { // Try iconv
|
|
366
|
if(function_exists('iconv')) {
|
|
367
|
$str = iconv('UTF-8', $charset_out, $str);
|
|
368
|
$converted = true;
|
|
369
|
}
|
|
370
|
}
|
|
371
|
if($converted) {
|
|
372
|
return($str);
|
|
373
|
}
|
|
374
|
|
|
375
|
// Nothing we can do here :-(
|
|
376
|
// Charset is one of those obscure ISO-2022... or BIG5, GB2312 or something
|
|
377
|
// and we can't use mb_convert_encoding() or iconv();
|
|
378
|
// Emit an error-message.
|
|
379
|
trigger_error("Can't convert into $charset_out without mb_convert_encoding() or iconv(). Use UTF-8 instead.", E_USER_WARNING);
|
|
380
|
|
|
381
|
return $str;
|
|
382
|
}
|
|
383
|
|
|
384
|
/*
|
|
385
|
* convert Filenames to ASCII
|
|
386
|
*
|
|
387
|
* Convert all non-ASCII characters and all HTML-entities to their plain 7bit equivalents
|
|
388
|
* Characters without an equivalent will be converted to hex-values.
|
|
389
|
* The name entities_to_7bit() is somewhat misleading, but kept for compatibility-reasons.
|
|
390
|
*
|
|
391
|
* @param string Filename to convert (all encodings from charset_to_utf8() are allowed)
|
|
392
|
* @return string ASCII encoded string, to use as filename in wb's page_filename() and media_filename
|
|
393
|
* @author thorn
|
|
394
|
*/
|
|
395
|
function entities_to_7bit($str) {
|
|
396
|
// convert to UTF-8
|
|
397
|
$str = charset_to_utf8($str);
|
|
398
|
if(!utf8_check($str))
|
|
399
|
return($str);
|
|
400
|
// replace some specials
|
|
401
|
$str = utf8_stripspecials($str, '_');
|
|
402
|
// translate non-ASCII characters to ASCII
|
|
403
|
$str = utf8_romanize($str);
|
|
404
|
// missed some? - Many UTF-8-chars can't be romanized
|
|
405
|
// convert to HTML-entities, and replace entites by hex-numbers
|
|
406
|
$str = utf8_fast_umlauts_to_entities($str, false);
|
|
407
|
$str = str_replace(''', ''', $str);
|
|
408
|
$str = preg_replace('/&#([0-9]+);/e', "dechex('$1')", $str);
|
|
409
|
// maybe there are some > < ' " & left, replace them too
|
|
410
|
$entities = array('>'=>'_','<'=>'_','''=>'_','"'=>'_','&'=>'_',' '=>' ');
|
|
411
|
$str = strtr($str, $entities);
|
|
412
|
|
|
413
|
return($str);
|
|
414
|
}
|
|
415
|
|
|
416
|
/*
|
|
417
|
* Convert a string from mixed html-entities/umlauts to pure $charset_out-umlauts
|
|
418
|
*
|
|
419
|
* Will replace all numeric and named entities except
|
|
420
|
* > < ' " '
|
|
421
|
* @author thorn
|
|
422
|
*/
|
|
423
|
function entities_to_umlauts2($string, $charset_out=DEFAULT_CHARSET) {
|
|
424
|
$string = charset_to_utf8($string, DEFAULT_CHARSET, true);
|
|
425
|
//if(utf8_check($string)) // this check is to much time-consuming (this may fail only if AddDefaultCharset is set)
|
|
426
|
$string = utf8_to_charset($string, $charset_out);
|
|
427
|
return ($string);
|
|
428
|
}
|
|
429
|
|
|
430
|
/*
|
|
431
|
* Convert a string from mixed html-entities/umlauts to pure ASCII with HTML-entities
|
|
432
|
*
|
|
433
|
* Will convert a string in $charset_in encoding to a pure ASCII string with HTML-entities.
|
|
434
|
* @author thorn
|
|
435
|
*/
|
|
436
|
function umlauts_to_entities2($string, $charset_in=DEFAULT_CHARSET) {
|
|
437
|
$string = charset_to_utf8($string, $charset_in, false);
|
|
438
|
//if(utf8_check($string)) // this check is to much time-consuming (this may fail only if AddDefaultCharset is set)
|
|
439
|
$string = utf8_fast_umlauts_to_entities($string, false);
|
|
440
|
return($string);
|
|
441
|
}
|
|
442
|
|
|
443
|
?>
|