Save ios emoticon to mysql database

I have a little problem, in fact, in one of my applications, the user can add a comment, and if he activates the keyBoard emoticon, he can insert the emoticon, but in the database he saved something like this "ŸŽðŸ¶ðŸ" and in the iphone it looks like this one , its usual :) but do you have a solution to get this emoticon in my application (encode, decode ..)?

thank.