PHP实现Javascript中的escape及unescape函数代码分享

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..

rush:PHP;"> 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

rush:PHP;"> PHP

function<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a>escape($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,2);
            $retrunString.="%u".$tmpString;
            $i++;
        }else{
            $retrunString.="%".dechex(ord($str[$i]));
        }
    }
    return$retrunString;
}


functio<a href="https://www.jb51.cc/tag/nes/" target="_blank" class="keywords">nes</a>cape($str)
{
    preg_match_all("/[\x80-\xff].|[\x01-\x7f]+/",$str,$r);
    $ar=$r[0];
    foreach($<a href="https://www.jb51.cc/tag/ara/" target="_blank" class="keywords">ara</a>s$k=>$v)
    {
        if(ord($v[0])<128)
            $ar[$k]=rawurlencode($v);
        else
            $ar[$k]="%u".bin2hex(iconv("UTF-8","UCS-2",$v));
    }
    returnjoin("",$ar);
}

function<a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a>u<a href="https://www.jb51.cc/tag/nes/" target="_blank" class="keywords">nes</a>cape($source)
{
    $decodedStr="";
    $pos=0;
    $len=strlen($source);

    while($pos<$len)
    {
        $charAt=substr($source,$pos,1);
        if($charAt=='%')
        {
            $pos++;
            $charAt=substr($source,1);
            if($charAt=='u')
            {
                // we got a unicode character 
                $pos++;
                $unicodeHexVal=substr($source,4);
                $unicode=hexdec($unicodeHexVal);
                $entity="&#".$unicode.';';
                $decodedStr.=utf8_encode($entity);
                $pos+=4;
            }else{
                // we have an escaped ascii character 
                $hexVal=substr($source,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",$r);
    $ar=$r[0];
    #print_r($ar);
    foreach($aras$k=>$v)
    {
        if(substr($v,2)=="%u")
            $ar[$k]=iconv("UCS-2","UTF-8",pack("H4",substr($v,-4)));
        elseif(substr($v,3)=="&#x")
            $ar[$k]=iconv("UCS-2",3,-1)));
        elseif(substr($v,2)=="&#")
        {
            //echo substr($v,-1)."";
            $ar[$k]=iconv("UCS-2",pack("n",-1)));
        }
    }
    returnjoin("",$ar);
}

?>