Uploading custom filetype to MySQL database

Hiya all,

I've made a custom save file using a BinaryWriter and its various Write() methods. I now want to upload this to a MySQL database as a blob/mediumblob using a WWWForm.

I know how to upload files to a database via Unity, but how would I upload a file like this without its binary data changing when I download it again?

This is my theory ... do you think this would work?

1) Download the local file and use Convert.ToBase64String to convert bytes to string.

//Some code omitted
WWW download = new WWW(localfile);
string fileAsString  = System.Convert.ToBase64String(download.bytes);

2) Send this string to a PHP script on my server using a WWWForm.

WWWForm form = new WWWForm();
form.AddField("filedata", fileAsString);
WWW w = new WWW("http://www.mysite.com/script.php", form);

3) In the PHP script I'll insert the string into my database as a mediumblob with no encoding.

$filedata = $_POST["filedata"];
$query = "INSERT INTO myTable (file) VALUES ('$filedata');";
$sqlResult = @mysql_query($query) or die("Could not connect to database");

Will any of this change the underlying binary data?

Regards, Joel.