二种escape unescape在php写法

*/

function phpescape($str){
$sublen=strlen($str);
$restring="";
for ($i=0;$i<$sublen;$i++){
if(ord($str[$i])>=127){
$tmps教程tring=bin2hex(iconv("utf-8","ucs-2",substr($str,$i,2)));

if (!eregi("win",php_os)){
$tmpstring=substr($tmpstring,2,2).substr($tmpstring,0,2);
}
$restring.="%u".$tmpstring;
$i++;
} else {
$restring.="%".dechex(ord($str[$i]));
}
}
return $restring;
}

function unescape($str) {
$str = rawurldecode($str);
preg_match_all("/%u.{4}|&#x.{4};|&#d+;|.+/u",$str,$r);
$ar = $r[0];
foreach($ar as $k=>$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) == "&#") {
$ar[$k] = iconv("ucs-2","utf-8",pack("n",substr($v,2,-1)));
}
}
return join("",$ar);
}

function escape($str) {
preg_match_all("/[x80-xff].|[x01-x7f]+/",$str,$r);
$ar = $r[0];
foreach($ar as $k=>$v) {
if(ord($v[0]) < 128)
$ar[$k] = rawurlencode($v);
else
$ar[$k] = "%u".bin2hex(iconv("gb2312","ucs-2",$v));
}
return join("",$ar);
}

function unescape($str) {
$str = rawurldecode($str);
preg_match_all("/(?:%u.{4})|.+/",$str,$r);
$ar = $r[0];
foreach($ar as $k=>$v) {
if(substr($v,0,2) == "%u" && strlen($v) == 6)
$ar[$k] = iconv("ucs-2","gb2312",pack("h4",substr($v,-4)));
}
return join("",$ar);
}