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..

<?phpclasscoding{  //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);    } ?>