秋水无恨 GBK Unicode UTF8 汉字 转换

PHP的汉字转换一直是比较麻烦的事

该类内置了四个过滤"&#[dec];","&#x[hex];","%u[hex]","utf8转换"
方便用户的使用，同时也可自定义过滤进行自己喜欢的操作

qswhU.php 从这里下载
idea.com/user/qswh/qswhU.zip">http://www.blueidea.com/user/qswh/qswhU.zip

class qswhU{
 var $qswhData;
 function qswhU($filename="qswhU.php"){
 $this->qswhData=file($filename);
 }
 
 function decode($str,$pattern=0){
 $arr=array("/&#(w+);/iU","/((%ww)+)/i","/%u(w{4,5})/iU");
 if(is_integer($pattern)){
 if($pattern>=count($arr))die("Invalid Function");
 $pattern=$arr[$pattern];
 }
 return preg_replace_callback($pattern,array($this,"u2gb"),$str);
 }
 
 function u2gb($arr){
 /******(qiushuiwuhen 2002-8-15)******/
 $ret="";$str=$arr[1];
 if(preg_match_all("/%w{2}/",$str,$matches)){
 for($i=0;$i $chr1=hexdec(substr($matches[0][$i],1));
 $arr=array("f0","e0","c0","0");
 for($j=0;$jhexdec($arr[$j]))break;
 $chr=hexdec(substr($matches[0][$i],1))-hexdec($arr[$j]);
 while(++$j $str=dechex($chr);
 if(strlen($str)==4){
 $p=hexdec(substr($str,0,2))-0x4d;
 $q=hexdec(substr($str,2))*4;
 $ret.=chr(hexdec(substr($this->qswhData[$p],$q,2)));
 $ret.=chr(hexdec(substr($this->qswhData[$p],$q+2,2)));
 }else
 $ret.=chr(hexdec($str));
 }
 }
 else{ 
 if(strtolower($str[0])=="x")
 $str=substr($str,1);
 else
 if(strlen($str)!=4)$str=dechex($str);
 
 if(strlen($str)==4){
 $p=hexdec(substr($str,0,2))-0x4d;
 $q=hexdec(substr($str,2))*4;
 $ret.=chr(hexdec(substr($this->qswhData[$p],$q,2)));
 $ret.=chr(hexdec(substr($this->qswhData[$p],$q+2,2)));
 }else
 $ret.=chr(hexdec($str));
 }
 return $ret;
 }
 
 
} 

使用范例

$qswh=new qswhU("qswhU.php");//如果文件名是qswhU.php,可省参数
echo "