将utf8数据保存到latin-swedish_ci MySQL

It seems that this question gets asked a lot, but I didn't find an answer that fits my setup and doen't ask me to convert my database.

Setup

I work in PHP, my db is latin_swedish_ci and the charset in the is utf-8.

I found a way to convert the db text to utf-8 using an homemade function that uses a mix of stripslashes() and utf8_encode(). I call it fxUnescape().

I also uses fxEscape() for MySQL purposes. It uses addslashes() and utf8_decode().

Problem

So here is my problem. When data is sent by a form, using fxEscape() breaks the accents and save them as ? in the database.

What do I do wrong?

p.s. To make things worse, Ihave a mix of iso-8859-1 and utf-8 encoded php files.

my posted data

Array
(
    [com_titre_billing] => m
    [com_prenom_billing] => Jean-SÃ©bastien
    [com_nom_billing] => Proulx
    [pay_iso_billing] => CA
    [com_infolettre] => 1
    [btn_enregistrer] => Enregistrer
)

NEVERMIND: found the problem, there was an extra utf8_encode in the code