php实现JS的encodeURI和decodeURI

<script language="javascript"> 

var a = encodeURI("电影");      

alert(a);

var b = decodeURI(a);

alert(b)

</script>

<?php

$a = urlencode(iconv("gb2312", "UTF-8", "电影")); //等同于javascript encodeURI("电影");

echo $a;

$b = iconv("utf-8","gb2312",urldecode("%E7%94%B5%E5%BD%B1")); //等同于javascript decodeURI("%E7%94%B5%E5%BD%B1");

echo $b;

?>