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

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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

$str=mb_substr($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);

}

}

?>

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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);

}

?>