这个类相当好用.作用么,php做json传递gbk字符,比如中文,日文,韩文神马的unicode最合适不过了..
<?php
classcoding
{
//模仿javascript的escape和unescape函数的功能
functionunescape($str)
{
$text=preg_replace_callback("/%u[0-9a-za-z]{4}/",array(
&$this,
'toutf8'
),$str);
returnmb_convert_encoding($text,"gb2312","utf-8");
}
functiontoutf8($ar)
{
foreach($aras$val){
$val=intval(substr($val,2),16);
if($val<0x7f){// 0000-007f
$c.=chr($val);
}elseif($val<0x800){// 0080-0800
$c.=chr(0xc0|($val/64));
$c.=chr(0x80|($val%64));
}else{// 0800-ffff
$c.=chr(0xe0|(($val/64)/64));
$c.=chr(0x80|(($val/64)%64));
$c.=chr(0x80|($val%64));
}
}
return$c;
}
functionescape($string,$encoding='gb2312')
{
$return='';
for($x=0;$x<mb_strlen($string,$encoding);$x++){
$str=mb_substr($string,$x,1,$encoding);
if(strlen($str)>1){// 多字节字符
$return.='%u'.strtoupper(bin2hex(mb_convert_encoding($str,'ucs-2',$encoding)));
}else{
$return.='%'.strtoupper(bin2hex($str));
}
}
return$return;
}
functiongb2utf8($string,$encoding='utf-8',$from_encode='gb2312')
{
returnmb_convert_encoding($string,$encoding,$from_encode);
}
}
?>
google code 上找到的另外一个类似脚本
<?php
functionphpescape($str)
{
$sublen=strlen($str);
$retrunstring="";
for($i=0;$i<$sublen;$i++)
{
if(ord($str[$i])>=127)
{
$tmpstring=bin2hex(iconv("gbk","ucs-2",substr($str,$i,2)));
$tmpstring=substr($tmpstring,2,2).substr($tmpstring,0,2);
$retrunstring.="%u".$tmpstring;
$i++;
}else{
$retrunstring.="%".dechex(ord($str[$i]));
}
}
return$retrunstring;
}
functionescape($str)
{
preg_match_all("/[x80-xff].|[x01-x7f]+/",$str,$r);
$ar=$r[0];
foreach($aras$k=>$v)
{
if(ord($v[0])<128)
$ar[$k]=rawurlencode($v);
else
$ar[$k]="%u".bin2hex(iconv("utf-8","ucs-2",$v));
}
returnjoin("",$ar);
}
functionphpunescape($source)
{
$decodedstr="";
$pos=0;
$len=strlen($source);
while($pos<$len)
{
$charat=substr($source,$pos,1);
if($charat=='%')
{
$pos++;
$charat=substr($source,$pos,1);
if($charat=='u')
{
// we got a unicode character
$pos++;
$unicodehexval=substr($source,$pos,4);
$unicode=hexdec($unicodehexval);
$entity="&#".$unicode.';';
$decodedstr.=utf8_encode($entity);
$pos+=4;
}else{
// we have an escaped ascii character
$hexval=substr($source,$pos,2);
$decodedstr.=chr(hexdec($hexval));
$pos+=2;
}
}else{
$decodedstr.=$charat;
$pos++;
}
}
return$decodedstr;
}
functionunescape($str)
{
$str=rawurldecode($str);
preg_match_all("/(?:%u.{4})|&#x.{4};|&#d+;|.+/u",$str,$r);
$ar=$r[0];
#print_r($ar);
foreach($aras$k=>$v)
{
if(substr($v,0,2)=="%u")
$ar[$k]=iconv("ucs-2","utf-8",pack("h4",substr($v,-4)));
elseif(substr($v,0,3)=="&#x")
$ar[$k]=iconv("ucs-2","utf-8",pack("h4",substr($v,3,-1)));
elseif(substr($v,0,2)=="&#")
{
//echo substr($v,2,-1)."";
$ar[$k]=iconv("ucs-2","utf-8",pack("n",substr($v,2,-1)));
}
}
returnjoin("",$ar);
}
?>
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