JSON解码问题

当我用Ajax发布文本时,如下所示:

var text = encodeURIComponent(transtext);

$text=$_POST['text']

似乎PHP会自动解码编码的字符串。有什么办法可以避免这种情况吗?

{"1":"\\"sdfsdfsdf" as&das&d ","2":"asdasd"}

我必须把字符串编码在里面,这样我才能把它贴出来json.strigify文件不编码(&P):

{"1":"%22asdasd%5C%22asdasd%22asdasd%26asdasd","2":"asdasd"}

POST={"1":""sdfsdfsdf" as&das&d ","2":"asdasd"}