ajax向php页面传值时应该如何编码?

Question

xmlHttp.open("POST","update.php", true); 
xmlHttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlHttp.send("url=" + url);
//update.php
$url = $_POST["url"];

Answer 1

中文要设定header("Content-Type:text/html;charset=GB2312");

Answer 2

update.php
==================
1.$url = iconv('gb2312','utf-8',$_GET['url']);2.echo iconv('gb2312','utf-8','我是中文');

Answer 3

foolbirdflyfirst(湖水清澈)对我的问题很明白,回答的太棒了!谢谢!