php的汉字转换：Unicode(UTF8)至GBK

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
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){
  $arr=array("/&#(\w+);/iU","/((%\w\w)+)/i","/%u(\w{4,5})/iU");
  if(is_integer($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 "

不带参数(默认过滤为：&#[num];):";<br>echo "\n".$qswh->decode("&#x4E2D;&#x6587;&#x41;&#x62;&#x63;");<br>echo "\n".$qswh->decode("&#20013;&#25991;&#65;&#98;&#99;");<br>echo "\n调用内置过滤(UTF转码):".$qswh->decode("%E4%B8%AD%E6%96%87%20!%22%23%24%25%26'()*%2B%2C%2F%3A%3B%3C%3D%3E%3F%40%5B%5D%5E%60%7B%7C%7D~%25Abc",1);<br>echo "\n调用内置过滤unescape(%u[num]):".$qswh->decode("%u4E2D%u6587Abc",2);<br>echo "\n自定义过滤([x+num]):".$qswh->decode("[x4E2D][x6587][x41][x62][x63]","/\[(\w+)\]/");</p> <p>效果如下：<br>不带参数(默认过滤为：&#[num];):<br>中文Abc<br>中文Abc<br>调用内置过滤(UTF转码):中文 !"#$%&'()*+,/:;<=>?@[]^`{|}~%Abc<br>调用内置过滤unescape(%u[num]):中文Abc<br>自定义过滤([x+num]):中文Abc</p> <p><br></p></div><div class="nphpQianMsg"><div class="clear"></div></div><div class="nphpQianSheng"><span>声明：</span><div>本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系admin@php.cn</div></div></div><div class="nphpSytBox"><span>上一篇：<a class="dBlack" title="php常用特殊运算符号和函数总结" href="http://m.php.cn/zh/faq/342694.html">php常用特殊运算符号和函数总结</a></span><span>下一篇：<a class="dBlack" title="php里 的 四舍五入" href="http://m.php.cn/zh/faq/342699.html">php里 的 四舍五入</a></span></div><div class="nphpSytBox2"><div class="nphpZbktTitle"><h2>相关文章</h2><em><a href="http://m.php.cn/zh/article.html" class="bBlack"><i>查看更多</i><b></b></a></em><div class="clear"></div></div><ins class="adsbygoogle" style="display:block" data-ad-format="fluid" data-ad-layout-key="-6t+ed+2i-1n-4w" data-ad-client="ca-pub-5902227090019525" data-ad-slot="8966999616"></ins><script> (adsbygoogle = window.adsbygoogle || []).push({}); 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