PHP实现JavaScript的escape和unescape

function.php

function escape($str){
preg_match_all( "/[/x80-/xff].|[/x01-/x7f]+/ ",$str,$newstr);
$ar = $newstr[0];
foreach($ar as $k=> $v){
if(ord($ar[$k])> =127){
$tmpString=bin2hex(iconv( "GBK ", "ucs-2 ",$v));
if (!eregi( "WIN ",PHP_OS)){
$tmpString = substr($tmpString,2,2).substr($tmpString,0,2);
}
$reString.= "%u ".$tmpString;
} else {
$reString.= rawurlencode($v);
}
}
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 "){
if (!eregi( "WIN ",PHP_OS)){
$tmpString = "%u ".substr($v,4,2).substr($v,2,2);
}
$ar[$k] = iconv( "UCS-2 ", "GB2312 ",pack( "H4 ",substr($tmpString,-4)));
}
elseif(substr($v,0,3) == "&#x ")
$ar[$k] = iconv( "UCS-2 ", "GB2312 ",pack( "H4 ",substr($v,3,-1)));
elseif(substr($v,0,2) == "&# ") {
$ar[$k] = iconv( "UCS-2 ", "GB2312 ",pack( "n ",substr($v,2,-1)));
}
}
return join( " ",$ar);
}

document.write(unescape('<?php echo escape('测试，看看吧！');?>'));

ELSE

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("BIG5","UCS-2",$v));
}
return join("",$ar);
}

alert(unescape('$str'));

Else: http://topic.csdn.net/u/20080928/10/cde07c2d-5b07-4d98-8dfa-eb6ee7e28bad.html