如何在javascript / jquery中打印unicode表情符号

Question

I'm creating a chat room using Javascript/jQuery, PHP and Websockets. I want to support Unicode emoticons. I have a DIV with emoticons and, when user click in one of them, the emoticon is inserted in an input box. Simple.

User press "enter" and the text is sent to PHP. But PHP can't understand the emoticon (shows "??"), so I did a function in Javascript to convert to \uXXXX format (4-bytes) before submit to PHP.

Example:

1) User submits "test

Answer 1

Found a solution, thanks to @cegfault idea.

Sending the string to JSON.parse function, it will show the emoticons correctly. But I had to escape the string to JSON format.

$('#chat').append(JSON.parse('"'+d+'"'));

Another way, not so secure, is the same idea but using eval() function, between quotes too.