php エスケープ URL エンコード_PHP チュートリアル

functionscape($str) {
preg_match_all("/[x80-xff].|[x01- x7f]+/" ,$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);