mirror of
https://gitee.com/ShopeX/OMS
synced 2026-03-23 02:45:33 +08:00
150 lines
4.6 KiB
PHP
150 lines
4.6 KiB
PHP
<?php
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/**
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* Copyright © ShopeX （http://www.shopex.cn）. All rights reserved.
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* See LICENSE file for license details.
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*/
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class base_charset_default implements base_charset_interface
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{
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function local2utf($strFrom,$charset='zh') {
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return $this->utfconvert($strFrom,$charset,false);
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}
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function utf2local($strFrom,$charset='zh') {
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return $this->utfconvert($strFrom,$charset,true);
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}
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function utfconvert($strFrom,$charset,$isfromUtf=false){
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if (!trim($strFrom)) return $strFrom;
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$fileGBU = fopen(dirname(__FILE__).'/default/'.($isfromUtf?'utf2'.$charset:$charset.'2utf').'.dat', "rb");
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$strBuf = fread($fileGBU, 2);
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$intCount = ord($strBuf[0]) + 256 * ord($strBuf[1]);
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$strRet = "";
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$intLen = strlen($strFrom);
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for ($i = 0; $i < $intLen; $i++) {
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if (ord($strFrom[$i]) > 127) {
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$strCurr = substr($strFrom, $i, $isfromUtf?3:2);
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if($isfromUtf){
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$intGB = $this->utf82u($strCurr);
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}else{
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$intGB = hexdec(bin2hex($strCurr));
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}
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$intStart = 1;
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$intEnd = $intCount;
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while ($intStart < $intEnd - 1) {
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$intMid = floor(($intStart + $intEnd) / 2);
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$intOffset = 2 + 4 * ($intMid - 1);
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fseek($fileGBU, $intOffset);
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$strBuf = fread($fileGBU, 2);
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$intCode = ord($strBuf[0]) + 256 * ord($strBuf[1]);
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if ($intGB == $intCode) {
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$intStart = $intMid;
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break;
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}
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if ($intGB > $intCode) $intStart = $intMid;
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else $intEnd = $intMid;
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}
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$intOffset = 2 + 4 * ($intStart - 1);
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fseek($fileGBU, $intOffset);
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$strBuf = fread($fileGBU, 2);
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$intCode = ord($strBuf[0]) + 256 * ord($strBuf[1]);
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if ($intGB == $intCode) {
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$strBuf = fread($fileGBU, 2);
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if($isfromUtf){
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$strRet .= $strBuf[1].$strBuf[0];
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}else{
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$intCodeU = ord($strBuf[0]) + 256 * ord($strBuf[1]);
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$strRet .= $this->u2utf8($intCodeU);
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}
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} else {
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$strRet .= "??";
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}
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$i+=$isfromUtf?2:1;
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} else {
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$strRet .= $strFrom[$i];
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}
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}
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fclose($fileGBU);
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return $strRet;
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}
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function u2utf8($c) {
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$str='';
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if ($c < 0x80) {
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$str.=$c;
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}
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else if ($c < 0x800) {
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$str.=chr(0xC0 | $c>>6);
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$str.=chr(0x80 | $c & 0x3F);
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}
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else if ($c < 0x10000) {
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$str.=chr(0xE0 | $c>>12);
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$str.=chr(0x80 | $c>>6 & 0x3F);
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$str.=chr(0x80 | $c & 0x3F);
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}
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else if ($c < 0x200000) {
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$str.=chr(0xF0 | $c>>18);
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$str.=chr(0x80 | $c>>12 & 0x3F);
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$str.=chr(0x80 | $c>>6 & 0x3F);
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$str.=chr(0x80 | $c & 0x3F);
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}
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return $str;
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}
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function utf82u($Char){
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switch(strlen($Char)){
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case 1:
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return ord($Char);
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case 2:
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$OutStr=(ord($Char[0])&0x3f)<<6;
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$OutStr+=ord($Char[1])&0x3f;
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return $OutStr;
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case 3:
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$OutStr=(ord($Char[0])&0x1f)<<12;
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$OutStr+=(ord($Char[1])&0x3f)<<6;
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$OutStr+=ord($Char[2])&0x3f;
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return $OutStr;
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case 4:
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$OutStr=(ord($Char[0])&0x0f)<<18;
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$OutStr+=(ord($Char[1])&0x3f)<<12;
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$OutStr+=(ord($Char[2])&0x3f)<<6;
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$OutStr+=ord($Char[3])&0x3f;
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return $OutStr;
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}
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}
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/**
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* 替换utf-8字符集的bomtou
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* @param string 传入待处理的字符串
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* @return mixed 待处理的字符串或者false
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*/
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public function replace_utf8bom($str)
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{
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if(substr($str,0,3)=="\xEF\xBB\xBF"){
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$str = substr($str,3);
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return $str;
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}else{
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return false;
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}
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}
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/**
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* 判断是否是utf-8字符集
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* @param string 传入字符串
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* @return boolean true or false
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*/
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public function is_utf8($word)
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{
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if(substr($word,0,3)=="\xEF\xBB\xBF"){
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return true;
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}elseif(mb_detect_encoding($word) == 'UTF-8'){
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return true;
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}else{
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return false;
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}
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}
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}//End Class
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